Sample report. The plot and its designations are real data for a house plot; the address is withheld and every project figure and answer is an invented example to show how the report works.
HomePlanningCheck Project Report
Sample house (address withheld)
Plot of about 351 m² (HM Land Registry outline) in North Hertfordshire District Council.
Produced 18 October 2026. Rules as at 18 October 2026: The Town and Country Planning (General Permitted Development) (England) Order 2015 (SI 2015/596), as amended, revised text valid from 27 August 2026. Data as at 18 October 2026. Fees from 1 April 2026.
What this report is, and what it is not
A screening of the permitted development rules in the Order against the figures you gave and the open data we hold for your plot. It is not a planning decision and not a Lawful Development Certificate. Every result is conditional on your figures and answers. We check the datasets listed in this report; where a council does not publish a dataset we say so. We never check: conditions on earlier planning permissions, restrictive covenants in your title, whether past works were lawful, Building Regulations, or party wall matters. For certainty, apply to the council for a Lawful Development Certificate.
Summary
Prior approval route
Lawful Development Certificate strongly recommended
Rule by ruleLikely permitted development, on the facts you gave and the data we hold
Lawful Development Certificate strongly recommended
Rule by ruleNeeds planning permission on the figures given
Planning application route
Rule by ruleYour plot
About 351 m² inside the outline. Shaded: land within 2 m of the outline, where lower limits apply (eaves of 3 m for extensions, 2.5 m height for outbuildings). The outline is indicative, not the legal boundary.
What we found on your plot
Each check is tested against your plot outline, not a postcode point.
- Evidence grade Acomplete government data, or a fixed rule in the Order
- Evidence grade Bdata published by the council (or a national compilation)
- Evidence grade Cyour answer
- Evidence grade Dunknown, not published or not public
Conservation area
Article 2(3) land
North Hertfordshire District Council does not publish its own conservation area data to the national planning data service. The national compilation shows none here, but it is incomplete. Check the council's conservation area map.
Source: Council records and Historic England's compilation, via planning.data.gov.uk.
Article 4 direction
Can remove rights
North Hertfordshire District Council does not publish its Article 4 directions to the national planning data service, so we could not check them. Check the council's list of Article 4 directions.
Source: Council records via planning.data.gov.uk.
Listed building
Consent and exclusions
No list entry sits on or within 10 m of your plot. Buildings and structures in the grounds of a listed building can be listed too (curtilage listing), which no dataset shows.
Source: Historic England's National Heritage List for England, via planning.data.gov.uk.
National Park
Article 2(3) land
Your plot is not in a National Park on this national dataset.
Source: National Park boundaries (ONS), via planning.data.gov.uk.
The Broads
Article 2(3) land
Your plot is not in the Broads.
Source: National Park boundaries (ONS), via planning.data.gov.uk.
National Landscape (Area of Outstanding Natural Beauty)
Article 2(3) land
Your plot is not in a National Landscape (Area of Outstanding Natural Beauty) on this national dataset.
Source: Natural England, via planning.data.gov.uk.
World Heritage Site
Article 2(3) land
Your plot is not in a World Heritage Site on this national dataset.
Source: Historic England, via planning.data.gov.uk.
Site of Special Scientific Interest
No larger home extension or Class AA
Your plot is not in a Site of Special Scientific Interest on this national dataset.
Source: Natural England, via planning.data.gov.uk.
Tree Preservation Orders
Protected trees
North Hertfordshire District Council does not publish its Tree Preservation Orders to the national planning data service, so we could not check them. Ask the council before cutting back or building near large trees.
Source: Council records via planning.data.gov.uk.
World Heritage Site buffer zone
Information only
Your plot is not in a World Heritage Site buffer zone on this national dataset.
Source: Historic England, via planning.data.gov.uk.
Special Area of Conservation
Habitats Regulations (rare for homes)
Your plot is not in a Special Area of Conservation on this national dataset.
Source: Natural England, via planning.data.gov.uk.
Special Protection Area
Habitats Regulations (rare for homes)
Your plot is not in a Special Protection Area on this national dataset.
Source: Natural England, via planning.data.gov.uk.
Scheduled monument
Scheduled monument consent
Your plot is not in a Scheduled monument on this national dataset.
Source: Historic England, via planning.data.gov.uk.
Data sources and licences
Designation data from planning.data.gov.uk under the Open Government Licence v3.0. © Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026. © Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026. © Crown copyright and database right 2026.
Plot outlines: this information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. The outlines show the indicative extent of a registered title, not its legal boundary.
Areas of special control under the Wildlife and Countryside Act 1981 s41(3), also article 2(3) land, are not checked: we found no dataset for them.
What North Hertfordshire District Council publishes to planning.data.gov.uk (snapshot 18 October 2026): conservation areas no, Article 4 directions no, Tree Preservation Orders no, listed building outlines no. Every council.
Single-storey rear extension
Prior approval routePrior approval route
4.5 m is more than 3 m but within 6 m, so it can go through the larger home extension prior approval process (A.4): notify the council before you start, with the £249 fee; neighbours get at least 21 days to comment; you may start after the council says prior approval is not needed or is given, or after 42 days with no decision.
Next step: Notify the council under the larger home extension process (A.4) before you start, with the £249 fee. For certainty on the rest of the rules, you can also apply for a Lawful Development Certificate (£274).
Drawn to scale from your figures.
Heights are measured from the ground next to the building, from the highest part where the ground slopes (art 2(2)). The roof shape is a sketch.
Rule by rule
| Rule | Limit | Yours | Result | Grade |
|---|---|---|---|---|
House, not a flat SI 2015/596 art 2(1) (definitions of "dwellinghouse", "flat" and "original") | Part 1 rights apply only to a dwellinghouse, which does not include a building containing one or more flats, or a flat in such a building | House | Passes You told us the building is a single house, not divided horizontally into separate homes. | Evidence grade C |
House not created by a permitted change of use SI 2015/596 Sch 2 Pt 1 para A.1(a) | Not permitted if the house exists as a home only because of Part 3 Class G, M, MA, N, P, PA or Q | No | Passes You told us the house was not made by a permitted development change of use. | Evidence grade C |
House not built under Part 20 SI 2015/596 Sch 2 Pt 1 para A.1(l) | Not permitted if the house was built under Part 20 (construction of new dwellinghouses) | No | Passes Part 20 homes are new homes built under permitted development since 2020, usually on top of existing blocks. Few houses fall in this group. | Evidence grade C |
No planning condition removing these rights SI 2015/596 art 3(4) (conditions on earlier permissions) | Nothing in the Order permits development contrary to a condition on an earlier planning permission | Not checked | Open A condition on an earlier permission can remove these rights. No national dataset holds these conditions, so we cannot check. Older houses are less often affected, but check the planning history. | Evidence grade D |
Existing building is lawful SI 2015/596 art 3(5) (unlawful buildings) | Permitted development does not apply in connection with a building whose construction was unlawful | No | Passes You told us no part of the house was built without a permission it needed in the last 10 years. | Evidence grade C |
No Article 4 direction removing this right SI 2015/596 art 4 (Article 4 directions) | An Article 4 direction can remove permitted development rights for an area or a single property | None in the council's published data | Passes North Hertfordshire District Council publishes its Article 4 direction areas, and none covers this plot in that data. | Evidence grade C |
The original house is known SI 2015/596 art 2(1) (definitions of "dwellinghouse", "flat" and "original") | Limits are measured from the original house: as it stood on 1 July 1948, or as built if later | Known | Passes You told us which parts of the house are original, so the measurements are taken from the original walls and roof. | Evidence grade C |
Half the garden rule SI 2015/596 Sch 2 Pt 1 para A.1(b) | Buildings other than the original house must not cover more than 50% of the curtilage (the plot, not counting the original house's footprint) | 11.8% (35 m² of 296 m²) | Passes About 11.8% of the plot would be covered, using the indicative Land Registry outline. That is well under half. | Evidence grade C |
Not higher than the existing roof SI 2015/596 Sch 2 Pt 1 para A.1(c) | The enlarged part must not be higher than the highest part of the existing roof | No | Passes The extension would not be higher than the highest part of the existing roof. | Evidence grade C |
Eaves not higher than the existing eaves SI 2015/596 Sch 2 Pt 1 para A.1(d) | The eaves of the enlarged part must not be higher than the eaves of the existing house | No | Passes The extension's eaves would not be higher than the existing eaves. | Evidence grade C |
Not beyond the principal elevation SI 2015/596 Sch 2 Pt 1 para A.1(e)(i) | Must not extend beyond a wall forming the principal elevation of the original house (usually the front) | No | Passes The extension stays behind the principal elevation. | Evidence grade C |
Single-storey depth beyond the rear wall SI 2015/596 Sch 2 Pt 1 para A.1(g)(i) | 4 m (detached house) or 3 m (any other house) beyond the rear wall of the original house; 8 m or 6 m through the larger home extension prior approval route, not on article 2(3) land or an SSSI | 4.5 m | Prior approval route 4.5 m is more than 3 m but within 6 m, so it can go through the larger home extension prior approval process (A.4): notify the council before you start, with the £249 fee; neighbours get at least 21 days to comment; you may start after the council says prior approval is not needed or is given, or after 42 days with no decision. | Evidence grade C |
Single-storey height SI 2015/596 Sch 2 Pt 1 para A.1(f)(ii) | A single-storey extension must not exceed 4 m in height (measured from ground level, art 2(2)) | 3.6 m | Passes Close to the limit 3.6 m is within the 4 m limit, but close to it: measure carefully. | Evidence grade C |
Eaves within 2 m of a boundary SI 2015/596 Sch 2 Pt 1 para A.1(i) | Within 2 m of the boundary of the curtilage, the eaves must not exceed 3 m | 0.3 m to boundary, eaves 2.7 m | Passes Close to the limit Eaves of 2.7 m are within the 3 m limit that applies within 2 m of a boundary. | Evidence grade C |
Totals with an existing extension SI 2015/596 Sch 2 Pt 1 para A.1(ja) | The new part together with any existing enlargement it joins must stay within limits (e) to (j) | No | Passes It does not join an existing extension. | Evidence grade C |
No verandah, balcony or raised platform SI 2015/596 Sch 2 Pt 1 para A.1(k)(i) | Must not include a verandah, balcony or raised platform (a platform more than 0.3 m high, para I) | No | Passes No verandah, balcony or raised platform. | Evidence grade C |
No microwave antenna SI 2015/596 Sch 2 Pt 1 para A.1(k)(ii) | Must not include installing, altering or replacing a microwave antenna | No | Passes No antenna. | Evidence grade C |
No chimney, flue or soil and vent pipe SI 2015/596 Sch 2 Pt 1 para A.1(k)(iii) | Must not include installing, altering or replacing a chimney, flue or soil and vent pipe | No | Passes No chimney, flue or soil and vent pipe. | Evidence grade C |
No alteration to the house's roof SI 2015/596 Sch 2 Pt 1 para A.1(k)(iv) | Must not include an alteration to any part of the roof of the house | No | Passes The existing roof is not altered (the extension's own roof is fine). | Evidence grade C |
Matching materials SI 2015/596 Sch 2 Pt 1 para A.3(a) | Exterior materials must be of a similar appearance to the existing house (conservatories excepted) | Condition to meet Use materials that look similar to the existing house. | Evidence grade A |
Open items
- No planning condition removing these rights. A condition on an earlier permission can remove these rights. No national dataset holds these conditions, so we cannot check. Older houses are less often affected, but check the planning history.
Lawful Development Certificate strongly recommended
- 1 item is still open (see the list).
- At least one figure is within 10% or 0.3 m of a limit.
- It relies on the larger home extension route.
Other consents
- Permitted development is planning permission only. Building Regulations approval is separate and usually needed for extensions, loft conversions and some outbuildings.
- Work on or near a shared wall or boundary may need a party wall notice under the Party Wall etc. Act 1996.
- Building over or near a public sewer usually needs the water company's agreement (a build-over agreement).
- Restrictive covenants in your title deeds can forbid works that planning rules allow. Check your title register.
Garden room, shed or outbuilding
Likely permittedLikely permitted development, on the facts you gave and the data we hold
Every rule we can test passes on the figures you gave. This is a screening result, not a decision: the open items below still apply.
On the information you gave. For certainty, apply for a Lawful Development Certificate.
Next step: For certainty, apply for a Lawful Development Certificate (council fee £136, half the £272 application fee; decision due within 8 weeks). Once granted, the works are presumed lawful (TCPA 1990 s192(4)).
Within 2 m of the boundary the limit is 2.5 m whatever the roof shape.
Rule by rule
| Rule | Limit | Yours | Result | Grade |
|---|---|---|---|---|
House, not a flat SI 2015/596 art 2(1) (definitions of "dwellinghouse", "flat" and "original") | Part 1 rights apply only to a dwellinghouse, which does not include a building containing one or more flats, or a flat in such a building | House | Passes You told us the building is a single house, not divided horizontally into separate homes. | Evidence grade C |
House not created by a permitted change of use SI 2015/596 Sch 2 Pt 1 para E.1(a) | Not permitted if the house exists as a home only because of Part 3 Class G, M, MA, N, P, PA or Q | No | Passes You told us the house was not made by a permitted development change of use. | Evidence grade C |
House not built under Part 20 SI 2015/596 Sch 2 Pt 1 para E.1(k) | Not permitted if the house was built under Part 20 (construction of new dwellinghouses) | No | Passes Part 20 homes are new homes built under permitted development since 2020, usually on top of existing blocks. Few houses fall in this group. | Evidence grade C |
No planning condition removing these rights SI 2015/596 art 3(4) (conditions on earlier permissions) | Nothing in the Order permits development contrary to a condition on an earlier planning permission | Not checked | Open A condition on an earlier permission can remove these rights. No national dataset holds these conditions, so we cannot check. Older houses are less often affected, but check the planning history. | Evidence grade D |
Existing building is lawful SI 2015/596 art 3(5) (unlawful buildings) | Permitted development does not apply in connection with a building whose construction was unlawful | No | Passes You told us no part of the house was built without a permission it needed in the last 10 years. | Evidence grade C |
No Article 4 direction removing this right SI 2015/596 art 4 (Article 4 directions) | An Article 4 direction can remove permitted development rights for an area or a single property | None in the council's published data | Passes North Hertfordshire District Council publishes its Article 4 direction areas, and none covers this plot in that data. | Evidence grade C |
Not within the curtilage of a listed building SI 2015/596 Sch 2 Pt 1 para E.1(g) | Not permitted within the curtilage of a listed building | Not listed | Passes On Historic England list (no entry on or within 10 m of the plot), the home and its plot are not listed. | Evidence grade A |
Incidental to the house SI 2015/596 Sch 2 Pt 1 para E | The building must be required for a purpose incidental to the enjoyment of the house (keeping pets, poultry or bees counts, para E.4) | No | Passes It is for a use incidental to enjoying the house, such as a garden room, home office, gym, shed or store. | Evidence grade C |
Half the garden rule SI 2015/596 Sch 2 Pt 1 para E.1(b) | Buildings other than the original house must not cover more than 50% of the curtilage (the plot, not counting the original house's footprint) | 6.8% (20 m² of 296 m²) | Passes About 6.8% of the plot would be covered, using the indicative Land Registry outline. That is well under half. | Evidence grade C |
Not forward of the principal elevation SI 2015/596 Sch 2 Pt 1 para E.1(c) | No part may be on land forward of a wall forming the principal elevation of the original house | No | Passes It is not in front of the principal elevation. | Evidence grade C |
Single storey SI 2015/596 Sch 2 Pt 1 para E.1(d) | The building must not have more than a single storey | Single storey | Passes It is single storey. | Evidence grade C |
Outbuilding height SI 2015/596 Sch 2 Pt 1 para E.1(e) | Height must not exceed 2.5 m within 2 m of the boundary; otherwise 4 m with a dual-pitched roof, or 3 m for any other roof | 2.5 m | Passes Close to the limit 2.5 m is within the lowest limit (2.5 m), so it passes wherever it sits in the garden. | Evidence grade C |
Eaves height SI 2015/596 Sch 2 Pt 1 para E.1(f) | The eaves must not exceed 2.5 m | 2.3 m | Passes Close to the limit 2.3 m is within the 2.5 m limit, but close to it: measure carefully. | Evidence grade C |
No verandah, balcony or raised platform SI 2015/596 Sch 2 Pt 1 para E.1(h) | Must not include a verandah, balcony or raised platform (a platform more than 0.3 m high) | No | Passes No verandah, balcony or raised platform. | Evidence grade C |
Not a separate dwelling SI 2015/596 Sch 2 Pt 1 para E.1(i) | Must not relate to a dwelling or a microwave antenna | No | Passes It will not be used as a separate home. | Evidence grade C |
Open items
- No planning condition removing these rights. A condition on an earlier permission can remove these rights. No national dataset holds these conditions, so we cannot check. Older houses are less often affected, but check the planning history.
Lawful Development Certificate strongly recommended
- 1 item is still open (see the list).
- At least one figure is within 10% or 0.3 m of a limit.
Other consents
- Permitted development is planning permission only. Building Regulations approval is separate and usually needed for extensions, loft conversions and some outbuildings.
- Work on or near a shared wall or boundary may need a party wall notice under the Party Wall etc. Act 1996.
- Building over or near a public sewer usually needs the water company's agreement (a build-over agreement).
- Restrictive covenants in your title deeds can forbid works that planning rules allow. Check your title register.
Loft conversion (dormer or hip-to-gable)
Needs permissionNeeds planning permission on the figures given
52 m³ is more than the 50 m³ limit.
Next step: A planning application is the route on these facts (council fee £548 from 1 April 2026). You can apply direct to the council or through the Planning Portal.
Detached or semi-detached house: 50 m³ (40 m³ if it is a terrace house). Counts every roof addition since the house was built (or since 1 July 1948).
Rule by rule
| Rule | Limit | Yours | Result | Grade |
|---|---|---|---|---|
House, not a flat SI 2015/596 art 2(1) (definitions of "dwellinghouse", "flat" and "original") | Part 1 rights apply only to a dwellinghouse, which does not include a building containing one or more flats, or a flat in such a building | House | Passes You told us the building is a single house, not divided horizontally into separate homes. | Evidence grade C |
House not created by a permitted change of use SI 2015/596 Sch 2 Pt 1 para B.1(a) | Not permitted if the house exists as a home only because of Part 3 Class G, M, MA, N, P, PA or Q | No | Passes You told us the house was not made by a permitted development change of use. | Evidence grade C |
House not built under Part 20 SI 2015/596 Sch 2 Pt 1 para B.1(g) | Not permitted if the house was built under Part 20 (construction of new dwellinghouses) | No | Passes Part 20 homes are new homes built under permitted development since 2020, usually on top of existing blocks. Few houses fall in this group. | Evidence grade C |
No planning condition removing these rights SI 2015/596 art 3(4) (conditions on earlier permissions) | Nothing in the Order permits development contrary to a condition on an earlier planning permission | Not checked | Open A condition on an earlier permission can remove these rights. No national dataset holds these conditions, so we cannot check. Older houses are less often affected, but check the planning history. | Evidence grade D |
Existing building is lawful SI 2015/596 art 3(5) (unlawful buildings) | Permitted development does not apply in connection with a building whose construction was unlawful | No | Passes You told us no part of the house was built without a permission it needed in the last 10 years. | Evidence grade C |
No Article 4 direction removing this right SI 2015/596 art 4 (Article 4 directions) | An Article 4 direction can remove permitted development rights for an area or a single property | None in the council's published data | Passes North Hertfordshire District Council publishes its Article 4 direction areas, and none covers this plot in that data. | Evidence grade C |
The original house is known SI 2015/596 art 2(1) (definitions of "dwellinghouse", "flat" and "original") | Roof space is measured against the original roof: as it stood on 1 July 1948, or as built if later | Known | Passes You told us which parts of the house are original, so the measurements are taken from the original walls and roof. | Evidence grade C |
Not higher than the existing roof SI 2015/596 Sch 2 Pt 1 para B.1(b) | No part may be higher than the highest part of the existing roof | No | Passes It stays below the highest part of the existing roof. | Evidence grade C |
Not beyond the front roof slope facing a highway SI 2015/596 Sch 2 Pt 1 para B.1(c) | No part may extend beyond the plane of an existing roof slope that forms the principal elevation and fronts a highway | No | Passes Nothing extends beyond the front roof slope facing a highway. | Evidence grade C |
Added roof volume SI 2015/596 Sch 2 Pt 1 para B.1(d) | The resulting roof space must not exceed the original roof space by more than 40 m³ (terrace house) or 50 m³ (any other house), counting earlier roof additions | 52 m³ | Fails 52 m³ is more than the 50 m³ limit. | Evidence grade C |
No verandah, balcony or raised platform SI 2015/596 Sch 2 Pt 1 para B.1(e)(i) | Must not include a verandah, balcony or raised platform | No | Passes No verandah, balcony or raised platform. | Evidence grade C |
No chimney, flue or soil and vent pipe SI 2015/596 Sch 2 Pt 1 para B.1(e)(ii) | Must not include installing, altering or replacing a chimney, flue or soil and vent pipe | No | Passes None included. | Evidence grade C |
Not on article 2(3) land SI 2015/596 Sch 2 Pt 1 para B.1(f) | Class B is not available on article 2(3) land | No | Passes The plot is not article 2(3) land on the data we hold. | Evidence grade C |
Not already built upwards SI 2015/596 Sch 2 Pt 1 para B.1(h) | Not available if the house has been enlarged under Class AA (additional storeys) | No | Passes No storeys have been added. | Evidence grade C |
Matching materials SI 2015/596 Sch 2 Pt 1 para B.2(a) | Exterior materials must be of a similar appearance to the existing house | Condition to meet Use materials that look similar to the existing house. | Evidence grade A | |
Eaves kept and 0.2 m set back SI 2015/596 Sch 2 Pt 1 para B.2(b)(i) | The original eaves must be kept, and the enlargement set back at least 0.2 m from the eaves (measured along the roof slope), so far as practicable | No | Passes The eaves are kept and the enlargement is set back at least 0.2 m. | Evidence grade C |
Nothing beyond the outside walls SI 2015/596 Sch 2 Pt 1 para B.2(b)(ii) | No part of the enlargement may extend beyond the outside face of an external wall of the original house (minor roof details such as tiles and gutters excepted) | No | Passes Nothing extends beyond the outside walls. | Evidence grade C |
Side windows SI 2015/596 Sch 2 Pt 1 para B.2(c) | Windows in a side wall or side roof slope must be obscure-glazed and non-opening below 1.7 m above the floor | Condition to meet Any side window must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor. | Evidence grade A |
Open items
- No planning condition removing these rights. A condition on an earlier permission can remove these rights. No national dataset holds these conditions, so we cannot check. Older houses are less often affected, but check the planning history.
Planning application
- A planning application is the route on these facts (council fee £548 from 1 April 2026). You can apply direct to the council or through the Planning Portal.
Other consents
- Permitted development is planning permission only. Building Regulations approval is separate and usually needed for extensions, loft conversions and some outbuildings.
- Work on or near a shared wall or boundary may need a party wall notice under the Party Wall etc. Act 1996.
- Restrictive covenants in your title deeds can forbid works that planning rules allow. Check your title register.
Planning history
Applications recorded on your plot, and larger housing permissions within 150 m that may be the estate permission for your home. Check each decision notice for conditions removing permitted development rights.
On your plot (2)
Variation of condition 2 of planning permission 20/02024/FPH granted 19/10/2020 - Minor amendment to dimensions of side addition together with internal layout revision. Amendments to external window and door apertures. Enhancement of front elevation features (as shown on plan 02A).
Reference withheld. Address withheld in this sample. Conditional Permission, decided 4 May 2022. PlanIt
Two storey side and part two storey, part single storey rear extension following demolition of existing single storey rear extension
Reference withheld. Address withheld in this sample. Conditional Permission, decided 19 October 2020. PlanIt
Larger housing permissions within 150 m (0)
None found.
173 other applications within 150 m are not listed. Planning history from PlanIt (planit.org.uk), which gathers council planning registers. Follow the links to the council's own record. Retrieved 18 October 2026.
Lawful Development Certificates and your council
- A certificate for proposed works is decided under the Town and Country Planning Act 1990 s192. If it is granted, the works are presumed lawful, unless the facts change before you start (s192(4)).
- Council fee: half the planning application fee, so £274 for an extension or roof works and £136 for an outbuilding, fence or driveway, from 1 April 2026 (GOV.UK fees). The Planning Portal adds a service charge on online applications with a fee over £100; you can also apply direct to the council.
- The application needs the form, a plan identifying the land to a stated scale with North shown, and evidence for the facts you state (DMPO 2015 art 39). The council should decide within 8 weeks of a valid application.
- Knowingly or recklessly making a false or misleading statement in an application is an offence (TCPA 1990 s194), and the council can revoke a certificate obtained that way (s193(7)). State only facts you can stand behind.
- Your council: North Hertfordshire District Council, www.north-herts.gov.uk. Check its website for its planning register, Article 4 list and any paid permitted development enquiry service.
Your answers (evidence grade C)
| Any part of the building divided horizontally into separate homes | No |
| House type | Semi-detached |
| Built | 1 July 1948 to 1990 |
| Conservation area (your check of the council's map) | Not in one |
| Article 4 (your check of the council's list) | None covers the home |
| Condition removing permitted development rights | Not checked |
| Converted from another use under permitted development | No |
| Work built without a needed permission in the last 10 years | No |
| Know which parts are original | Yes |
| Storeys already added | No |
| Ground area of the original house | 55 m² |
| Ground already covered by later buildings | 8 m² |
| Width of the original house | 6.5 m |
| Outline is only your home and garden | Yes |
| Your measurement of the plot | Not given (outline area about 351 m² used, indicative) |
| Cost over about £20,000 or sale within 10 years | Yes |
Rule set: The Town and Country Planning (General Permitted Development) (England) Order 2015 (SI 2015/596), as amended, revised text valid from 27 August 2026 (checked 18 October 2026). The GOV.UK householder technical guidance was last updated 10 September 2019 and predates Class AA, so these rules come from the Order itself.
Plot outlines: this information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. The outlines show the indicative extent of a registered title, not its legal boundary.
HomePlanningCheck is independent and not connected to any council or government body. Anyone can apply for a Lawful Development Certificate direct to their council or through the Planning Portal.