House Extension Drawings in Thornton Heath |

No Article 4 Direction covers Croydon, which keeps the Thornton Heath permitted-development route open on unlisted houses. What defines Thornton Heath is that it is Edwardian terraces, and design decisions here answer to that rather than to a pattern book. Of the 24 conservation areas Croydon designates, Shirley Park and South Norwood are the ones that most often change how a Thornton Heath project is routed. That check comes before anything else on a Thornton Heath job.

How Article 4 directions apply to your Thornton Heath street is settled at survey stage, not after submission. Everything on a Thornton Heath scheme is measured from the edwardian terraces outward. The borough policy layer over every CR7 address is set out on Croydon planning. The Thornton Heath survey then carries into loft conversion drawings in Thornton Heath if the project runs on to construction.

London Borough of Croydon takes one to two weeks to validate a Thornton Heath submission. Survey first: we measure the Thornton Heath property in person, then draw the existing plans, sections and elevations from that data.

Statutory periods: 8 weeks from validation for a householder application, 13 weeks for a major scheme, 6 weeks for prior approval with a 21 days neighbour consultation, and 5 weeks for a full plans building control submission. A party structure notice requires one month notice and two months where excavation is involved.

Amendments during the Thornton Heath determination are handled without a resubmission where possible. The Thornton Heath pack is validated against London Borough of Croydon requirements before submission.

Comments on a Thornton Heath application are visible on the London Borough of Croydon portal. Existing structure in the edwardian terraces is identified at survey, not guessed later.

Serve party wall notices early where CR7 neighbours share a flank wall — on Thornton Heath terraces they nearly always do. Once consent is granted, architectural drawings follows for the CR7 property.

Thornton Heath is characterised by edwardian terraces, concentrated across CR7 in the Thornton Heath area. CR7 construction is edwardian terraces-led, and the survey establishes what it carries. In practice on a Thornton Heath job, edwardian plots here are wider, so a wraparound picking up both the side return and the rear is normally achievable within the 4 m detached / 3 m attached limits. On Thornton Heath plots that shows up in the section drawings. Croydon Council judges massing against the established Thornton Heath rhythm — the eaves and ridge lines running past Thornton Heath station.

No borough-specific basement policy applies in Croydon, so subterranean work at a Thornton Heath address is judged on amenity, drainage and structural grounds. If the CR7 job later needs planning permission for CR7 properties or building regulations drawings, the existing drawings already carry the measurements.

What the Thornton Heath drawing pack contains

Everything a Thornton Heath submission needs is in the list below.

• existing and proposed ground-floor plans for the Thornton Heath property
• proposed rear elevation
• long section through the extension
• site and block plans
• party wall position drawing

Local landmarks that shape a Thornton Heath application

• Selhurst Park — side returns where the 45-degree amenity test decides how far a Selhurst Park extension goes.
• Pollards Hill — gardens deep enough for the 8 weeks householder route on a Pollards Hill plot.
• Thornton Heath station — proposals in its setting are drawn with the Thornton Heath context elevation.
• Croydon University Hospital — sightlines from here are part of the Croydon Council character assessment.

Getting to a Thornton Heath survey

Surveyors travel to CR7 addresses from the studio; the nearest stations are Thornton Heath, London Victoria, Selhurst, Norwood Junction. Appointments are booked in Thornton Heath on weekdays and Saturdays, and the measured survey of a standard edwardian terraces takes two to three hours.

Where Thornton Heath sits

Thornton Heath lies 7.2 miles (11.6 km) south of Charing Cross, on Ordnance Survey grid reference TQ315685, inside the Streatham and Croydon NorthCroydon West parliamentary constituency. Location and block plans for Thornton Heath start from that grid square. Source.

Practical detail for a Thornton Heath submission: transport for Thornton Heath runs through Thornton Heath and London Victoria and Selhurst and Norwood Junction; post town CROYDON; dialling code 020. Site plans are drawn to the address as Croydon Council holds it.

Thornton Heath postcode coverage

Thornton Heath work spans CR7 (Thornton Heath), which Thornton Heath holds on its own, with the CR7 boundary setting which designations bite.

Streets and stations in Thornton Heath

Work in Thornton Heath clusters around Selhurst Park and Pollards Hill. most Thornton Heath sites are within walking distance of Thornton Heath or London Victoria or Selhurst.

Areas we cover around Thornton Heath

Thornton Heath sits in a patch that also takes in Sutton (SM1), Carshalton (SM5), Cheam (SM2, SM3), Wallington (SM6), Worcester Park (KT4), Belmont (SM2), and we work all of it as far as the Merton boundary.

What changes a Thornton Heath fee is the property: edwardian terraces construction, shared walls on CR7, and whether heritage input is needed.

Statutory application fees are set by regulation, not by the council: £548 householder, £610 for a new dwelling, £274 for a lawful development certificate, £249 for prior approval.

We do not mark up the London Borough of Croydon fee — it is paid at submission. London planning approval-rate dataset · Croydon planning · the London house extension drawings pillar page · house extension drawings in Sutton.

We are architectural technologists, MCIAT chartered, and every Thornton Heath set carries that accountability. Where a Thornton Heath case is borderline — a corner plot near Thornton Heath station, a Shirley Park frontage, a flank wall hard onto a CR7 neighbour — we buy pre-application advice from Croydon Council rather than gamble the statutory 8 weeks.

Drawings are produced by chartered members of the Chartered Institute of Architectural Technologists (MCIAT), the professional body for technical design and building-regulations competence. First-time approval across our London caseload is 98%. Statutory fees shown are those in force in England in 2026 under the Town and Country Planning (Fees for Applications) Regulations. Confirm your local authority at gov.uk and submission requirements on the Planning Portal. Studio: 71–75 Shelton Street, London WC2H 9JQ.

We will tell you if a Thornton Heath project does not need us. This Thornton Heath page was reviewed in August 2026.