House Extension Drawings in Blackheath |

No Article 4 Direction covers Lewisham, which keeps the Blackheath permitted-development route open on unlisted houses. The prevailing character of Blackheath — Georgian and Victorian villas around the heath — sets what Lewisham Council will accept near All Saints Church and what it will resist. Inside the Hither Green boundary — one of 30 such designations in Lewisham — a Blackheath scheme normally goes straight to a full Lewisham Council application rather than relying on permitted development. We establish it for the SE3 address before any drawing begins.

Article 4 coverage across SE3 is confirmed before we quote, not after. The georgian villas in Blackheath decides the depth before policy does. The borough policy layer over every SE3 address is set out on Lewisham planning. The Blackheath survey then carries into planning permission in Blackheath if the project runs on to construction.

Validation alone costs London Borough of Lewisham one to two weeks even when the Blackheath pack is complete, and that queue — not the determination — is where most SE3 delay starts. The first visit to Blackheath is a measured survey — every room, every opening, every level change recorded on site.

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.

An officer report on the SE3 case is written after the consultation closes. A Blackheath pack that misses a scale bar is a pack London Borough of Lewisham will reject — ours do not.

Most Blackheath refusals trace back to overlooking, not to size. Drainage runs and manhole positions on the SE3 plot are picked up on the day.

Serve SE3 party wall notices before work starts, not after. Once consent is granted, building regulations drawings follows for the SE3 property.

Blackheath is characterised by georgian villas, victorian terraces, concentrated across SE3 in the Blackheath / Kidbrooke area. On Blackheath plots, structure follows the georgian villas that is already there. On SE3 plots specifically, georgian rear elevations here are usually the listed or locally listed face of the building, so a glazed link and a lightweight rear addition tend to fare better than a full-width box. For a Blackheath owner it decides the structural spec. Massing on a Blackheath scheme is argued against the All Saints Church street rhythm.

A SE3 dig turns on engineering more than on policy. A Blackheath survey done once feeds loft conversion drawings for SE3 properties and architectural drawings later.

What the Blackheath drawing pack contains

No add-ons later — the Blackheath scope is set out here.

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

Streets and landmarks we survey around Blackheath

• Westcombe Park — frontages visible from the highway, so Hither Green materials detail governs the Westcombe Park elevation.
• Slade Green — side returns where the 45-degree amenity test decides how far a Slade Green extension goes.
• Greenwich Park — gardens deep enough for the 8 weeks householder route on a Greenwich Park plot.
• Watling Street — frontages visible from the highway, so Hither Green materials detail governs the Watling Street elevation.
• Shooters Hill — front-to-back level changes that drive the Shooters Hill section drawings.
• All Saints Church — the surrounding georgian villas takes its scale from it.
• Blackheath — Lewisham Council weighs SE3 sightlines to it in the character assessment.
• Blackheath High School — the surrounding georgian villas takes its scale from it.
• Catholic Church — it fixes the local datum a Blackheath roof extension is judged against.
• Blackheath Proprietary School — sightlines from here are part of the Lewisham Council character assessment.
• Putney Heath — schemes in view of it attract closer officer scrutiny.

Getting to a Blackheath survey

Surveyors travel to SE3 addresses from the studio; the nearest stations are Blackheath, London Victoria, Charing Cross, Cannon Street. Appointments are booked in Blackheath on weekdays and Saturdays, and the measured survey of a standard georgian villas takes two to three hours.

Where Blackheath sits

Blackheath lies 6.4 miles (10.3 km) southeast of Charing Cross, on Ordnance Survey grid reference TQ395765, inside the Lewisham North parliamentary constituency. Lewisham Council checks the Blackheath location plan against that reference before registering it. Source.

Practical detail for a Blackheath submission: Blackheath and London Victoria and Charing Cross and Cannon Street put Blackheath within easy reach; SE3 addresses are written to LONDON; dialling code 020; Grade I listed building sit within the Blackheath setting and are listed. Site plans are drawn to the address as Lewisham Council holds it.

Blackheath postcode coverage

We draw SE3 (Blackheath / Kidbrooke), shared with Blackheath (Greenwich), Kidbrooke addresses, and Lewisham Council validates each on the address itself.

Streets and stations in Blackheath

Our SE3 caseload covers Westcombe Park, Slade Green, Greenwich Park, Watling Street and Shooters Hill. most Blackheath sites are within walking distance of Blackheath or London Victoria or Charing Cross. and Grade I listed building is listed, which pulls neighbouring SE3 proposals into a setting assessment.

Areas we cover around Blackheath

Borough (SE1), Camberwell (SE5), Peckham (SE15), Dulwich Village (SE21), East Dulwich (SE22), Rotherhithe (SE16) are all within the same Lewisham policy area as Blackheath.

The variables on a SE3 job are structural: party walls, floor levels, and whether the Hither Green designation adds a heritage statement.

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.

Those statutory fees go to London Borough of Lewisham on submission. London planning approval-rate dataset · Lewisham planning · the London house extension drawings pillar page · house extension drawings in Borough.

We are architectural technologists, MCIAT chartered, and every Blackheath set carries that accountability. On a marginal Blackheath plot we would rather spend on Lewisham Council pre-application advice than lose 8 weeks to a refusal on a SE3 address.

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.

Tell us the SE3 address and what you want to build; the rest we handle. This Blackheath page was reviewed in August 2026.