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Architectural drawings · Lewisham

Architectural drawings in Forest Hill

Fixed-fee planning, building regulations, loft, extension and mansard drawings for properties in Forest Hill (SE23). MCIAT chartered. 30% below typical London architect rates.

Forest Hill at a glance

Borough
Lewisham
Postcodes
SE23
Dominant stock
Victorian villas, Edwardian terraces
Local landmarks
Horniman Museum
Article 4 in force
No
Conservation areas in borough
30
Architectural design tools and technical drawings — architectural drawings in Lewisham
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MCIAT chartered drawings for planning, building regs, lofts and extensions — fixed fees 30% below typical London architects. Tell us what you need and we’ll reply the same working day.

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  • Fixed fees from £840

Local context

Why Forest Hill needs a specialist

Forest Hill is Victorian villas, Edwardian terraces. The streetscape is dominated by victorian villas, edwardian terraces, which means design decisions — roofscape, rear glazing, side returns, mansards — must respect the period rhythm of the row. Lewisham planning (Lewisham Council) decides applications here. Most permitted development rights apply normally in Lewisham for residential extensions.

Services in Forest Hill

Frequently asked in Forest Hill

Forest Hill planning questions

Do I need planning permission for an extension in Forest Hill?

Forest Hill sits within Lewisham, so applications are decided by Lewisham Council. Most single-storey rear extensions and side-returns on terraced or semi-detached homes in Forest Hill fall under Permitted Development — up to 3m deep (attached) or 4m (detached), under 4m high. Flats, listed buildings and conservation areas always require full planning. Article 4 status here: No. We check eligibility free at the site visit.

What's the dominant housing stock in Forest Hill?

Forest Hill is characterised by Victorian villas, Edwardian terraces. The dominant stock is Victorian villas, Edwardian terraces. We've drawn extensions and lofts for every period represented here — Victorian rear additions, Edwardian side returns, 1930s wrap-arounds, and contemporary infill where the streetscape allows.

How long does a planning application take in Forest Hill?

Lewisham Council statutory determination is 8 weeks for householder applications. Validation typically adds 1–2 weeks. From your first call to a decision, expect 12–14 weeks total: 1 week measured survey, 2 weeks design, 1–2 weeks validation, 8 weeks determination. We've achieved a 98% first-time approval rate across Lewisham.

How much does a loft conversion cost in Forest Hill?

Loft conversion drawings in Forest Hill start at £1,225 for planning + building regs combined. Construction cost (separate from drawings) is £45,000–£75,000 for a standard rear dormer on a Victorian or Edwardian terrace, £65,000–£95,000 for a hip-to-gable plus dormer. We quote drawings as a fixed fee — no hourly creep.

Are there conservation areas in Forest Hill?

Lewisham has 30 designated conservation areas. Nearest to Forest Hill: Blackheath. In a conservation area, full planning is required for most external work (including roof additions, rendering, replacement windows). We prepare a Heritage Statement covering the conservation area's character appraisal.

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Other neighbourhoods we cover

Postcodes covering Forest Hill

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Which postcode districts around Forest Hill do we cover for drawing package work?

Every Forest Hill postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. Forest Hill fees below are the statutory England rates for 2026, not drawing package estimates.

PostcodeAreaDominant stockWhat it means for a drawing package
SE23Forest Hill / Honor OakVictorian villas, Edwardian terracesA drawing package at an SE23 address in Forest Hill / Honor Oak is determined by Lewisham Council under its own Local Plan policies for Forest Hill / Honor Oak.
SE4BrockleyVictorian and Edwardian terracesNeighbouring Brockley, where drawing package work is handled by the same Lewisham Council case officers.
SE23Honor OakVictorian villas, Edwardian terracesNeighbouring Honor Oak, where drawing package work is handled by the same Lewisham Council case officers.
SE13LewishamVictorian terraces, post-war flatsNeighbouring Lewisham, where drawing package work is handled by the same Lewisham Council case officers.
SE3BlackheathGeorgian villas, Victorian terracesNeighbouring Blackheath, where drawing package work is handled by the same Lewisham Council case officers.
SE6Catford1930s semi-detached, post-war flatsNeighbouring Catford, where drawing package work is handled by the same Lewisham Council case officers.
SE8DeptfordGeorgian terraces, post-war estates, new-buildNeighbouring Deptford, where drawing package work is handled by the same Lewisham Council case officers.
SE13Hither GreenEdwardian terraces, 1930s semi-detachedNeighbouring Hither Green, where drawing package work is handled by the same Lewisham Council case officers.
SE26SydenhamVictorian villas, Edwardian terracesNeighbouring Sydenham, where drawing package work is handled by the same Lewisham Council case officers.

How does a drawing package differ street by street across Forest Hill?

Roof pitch, wall build-up and plot depth change every few Forest Hill streets, and each one changes what a drawing package can achieve at that address.

Does Forest Hill planning policy restrict a drawing package?

Conservation areas covering Forest Hill: Lewisham Council runs 30, and Deptford High Street, Forest Hill, Hither Green are the ones Forest Hill owners meet most. A drawing package inside a Forest Hill conservation area loses permitted development, so the Forest Hill submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Hither Green a drawing package is judged on the street elevation first.

Article 4 and your Forest Hill drawing package: Lewisham Council has made no borough-wide direction, so permitted development for a drawing package in Forest Hill generally survives outside Forest Hill conservation areas and listed curtilages. A Lawful Development Certificate at £129 is how a SE23 owner records that a drawing package was lawful.

What Forest Hill is built from: Victorian and Edwardian terraces across Brockley, Honor Oak, Forest Hill; 1930s semi-detached in Catford and Hither Green; post-war mixed in Deptford. Generally permissive planning compared to central boroughs; loft conversions and side-return extensions routinely approved under PD. That mix decides the drawing package route in Forest Hill more than the postcode does. Our fixed fee for architectural drawings in Forest Hill starts at £840, against £1,750 for the Complete package that carries a Forest Hill scheme through Lewisham Council planning and building regulations together.

Which neighbouring authorities border Forest Hill?

Sources for this Forest Hill drawing package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.

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