Sutton, London
Lawful Development Certificate in Sutton
In Sutton 62.9 per cent of households live in a house, so a Lawful Development Certificate is open to many owners here. We draw and submit the application from £645 including VAT, and we start by checking whether your plot is on Green Belt land or in one of Sutton's 8 conservation areas.
From £645 (VAT included)
- MCIAT chartered
- £2m PI insured
- LABC Partnered
- Fixed fees, VAT included
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Sutton's own guidance and what it means for an LDC
A certificate is decided on the Order, not on local design guidance. Even so, Sutton's Design of Residential Extensions SPD is the document its planners use when a project falls outside permitted development, so we read it alongside the Order. If a scheme sits close to a limit, knowing how the council treats the same extension as a full application helps you decide whether to trim it or to apply for permission.
The borough's development plan is the Sutton Local Plan 2016-2031, adopted in 2,018, and the Urban Design Guide SPD sits beside it. Neither changes what permitted development allows. They matter when the certificate is not available and you need the fallback.
We keep the two routes side by side from the first sketch. That way a refusal to grant a certificate does not send you back to the beginning.
Local figures for Sutton
| Measure | Value | Period | Source |
|---|---|---|---|
| Conservation areas | 8 named conservation areas published by the council | — | planning.data.gov.uk |
| Listed building entries | 209 list entries (Historic England, within the LPA boundary) | — | planning.data.gov.uk |
| Lawful development certificate applications (PS1) | 297 certificates | 2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026) | assets.publishing.service.gov.uk |
| Green Belt share of the council area | 14 % of council area covered by green-belt polygons | — | planning.data.gov.uk |
| Householder decisions | 601 decisions | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications granted | 91.8 % | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| GPDO 2015 Sch 2 Pt 1 Class A, para A.1(f)(i) | 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey | — | legislation.gov.uk |
| Class A, para A.1(f)(ii): single-storey rear extension height | 4 m | — | legislation.gov.uk |
| GPDO 2015 Sch 2 Pt 1 Class B, para B.1(d) | 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume | — | legislation.gov.uk |
| Class A, para A.1(b) | Buildings (other than the original house) may not cover more than 50% of the curtilage | — | legislation.gov.uk |
| Lawful Development Certificate: proposed use or operation | Half the normal planning fee (householder: £274) | — | ribblevalley.gov.uk |
| DMPO 2015 art 39(10)(a) | 8 weeks | — | legislation.gov.uk |
| Larger home extension prior approvals granted | 9 decisions | 2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026) | assets.publishing.service.gov.uk |
| Larger home extension prior approvals refused | 35 decisions | 2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026) | assets.publishing.service.gov.uk |
| Minor applications granted | 76.5 % | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Minor application decisions | 196 decisions | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
A blank value means the figure has not been published, not that there are none. Check your own address with the council.
Which application your project needs
The usual route for a house; flats and listed buildings follow other rules.
- A · Lawful Development Certificate decision
- 8 weeks
- B · Prior approval decision
- 42 days
- C · Householder decision
- 8 weeks
Green Belt and conservation areas in Sutton
About 14 per cent of Sutton is covered by Green Belt polygons. Householder permitted development rights still apply on Green Belt land in most cases, but the size limits are the same and every outbuilding counts towards the curtilage total.
Conservation areas are more restrictive. Sutton has 8, and inside them side extensions and rear extensions of more than one storey are outside Class A. The borough also contains 209 listed building entries, and a listed house needs listed building consent whatever a certificate says.
A postcode check is not enough because a boundary can split a single street. We plot the plot itself on the council's map and keep the printout with your file.
Extending a Sutton semi under permitted development
Semi-detached and detached houses are the usual candidates here. A single-storey rear extension is limited to 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey, and the height cap is 4 metres. Eaves close to a boundary are held down: Eaves no higher than 3 m where within 2 m of the curtilage boundary.
Lofts follow the volume rule. Under Class B you may add 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume, and a hip-to-gable or rear dormer is usually measured against it. A previous roof alteration counts, so we ask for the building control history.
Where a project combines a rear extension, a loft and an outbuilding, the curtilage limit often bites first. The rule reads: Buildings (other than the original house) may not cover more than 50% of the curtilage. We total the areas on one sheet so the answer is clear before you apply.
How many certificates Sutton handles
The government's planning returns record 297 lawful development certificate applications in Sutton in the latest year. The route is plainly in regular use here.
Householder planning decisions give a second view. Sutton decided 601 of them and granted 91.8 per cent. Those figures describe planning applications, not certificates, and say nothing about your house.
Because the certificate is decided on the Order alone, the drawings carry more weight than any argument. Each limit that applies to your project is marked on the sheet beside the dimension it tests, so the case officer can check the figures without writing back to us for clarification.
Why larger rear extensions are a different question in Sutton
Some projects need more depth than the certificate limits allow, and the record shows how Sutton treats those requests. In its latest return the council granted 9 larger home extension prior approvals and refused 35. Those are prior approvals, not certificates, but they show that the neighbour consultation step is where deeper extensions are often decided.
The difference matters for your plan. A certificate confirms a project that already sits inside the Order's limits. Prior approval lets a deeper single-storey extension go ahead after the council has considered neighbours' views. If your wish list is close to the limit, we can draw both options from one survey so you can compare them. See prior approval drawings in Sutton for how that route works.
Sutton's minor applications, which include small schemes beyond householder work, were granted at 76.5 per cent across 196 decisions. We mention it only as background for projects that outgrow both routes.
Fee, drawings and next steps
The council fee for a proposed-use certificate is set nationally: Half the normal planning fee (householder: £274), payable to Sutton. Our fee is fixed before you commit, a second chartered technologist checks every sheet, and changes the officer asks for are redrawn at no charge until approval.
If the certificate route closes, our planning drawings in Sutton take the same survey forward. Once the design is settled, building regulations drawings in Sutton cover structure and insulation.
Neighbouring boroughs follow different rules, so compare Croydon, Merton and Kingston upon Thames, or read the overview in architectural drawings in Sutton.
What you receive
Related pages
Other services in Sutton
Lawful Development Certificates nearby
Questions
Do I need a Lawful Development Certificate in Sutton?
No, it is optional. It is written proof that work is lawful, which buyers' solicitors and lenders often ask for.
Can I extend a house on Green Belt land in Sutton under permitted development?
Often yes, because householder rights mostly still apply. About 14 per cent of the borough is Green Belt, so we check the plot and the size limits before drawing.
What does an LDC cost in Sutton?
Our fee starts at £645 including VAT, fixed up front. The council's fee is separate: Half the normal planning fee (householder: £274).
How long does an LDC take in Sutton?
The statutory period is 8 weeks. We treat any date as an estimate.
Sources and dates
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- assets.publishing.service.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- assets.publishing.service.gov.uk, retrieved
- legislation.gov.uk, retrieved
- ribblevalley.gov.uk, retrieved
- legislation.gov.uk, retrieved
- sutton.gov.uk, retrieved
- sutton.gov.uk, retrieved
- nomisweb.co.uk, retrieved
- legislation.gov.uk, retrieved
- Contains public sector information licensed under the Open Government Licence v3.0.
- Contains OS data © Crown copyright and database right 2026.
- Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
- Contains Historic England data © Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026.
Tell us about your property.
We check the constraints, then send a fixed fee. Messages before 3pm get a reply the same working day.