Fixed-fee planning, building regulations, loft, extension and mansard drawings for properties in Deptford (SE8). MCIAT chartered. 30% below typical London architect rates.
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.
Deptford is Georgian fragments, regenerating quarter. The streetscape is dominated by georgian terraces, post-war estates, new-build, 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.
From £840. Planning permission drawings delivered by an MCIAT chartered team.
From £840. Building regulations drawings delivered by an MCIAT chartered team.
From £1,225. Loft conversion drawings delivered by an MCIAT chartered team.
From £1,225. House extension drawings delivered by an MCIAT chartered team.
From £1,575. Mansard roof extensions delivered by an MCIAT chartered team.
From £995. Garage conversion drawings delivered by an MCIAT chartered team.
From £1,950. Basement conversion drawings delivered by an MCIAT chartered team.
From £350. Structural calculations delivered by an MCIAT chartered team.
From £540. Measured building survey delivered by an MCIAT chartered team.
From £450. Party wall services delivered by an MCIAT chartered team.
From £1,225. Rear dormer drawings delivered by an MCIAT chartered team.
Deptford 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 Deptford 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.
Deptford is characterised by Georgian fragments, regenerating quarter. The dominant stock is Georgian terraces, post-war estates, new-build. 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.
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.
Loft conversion drawings in Deptford 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.
Lewisham has 30 designated conservation areas. Nearest to Deptford: 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.
Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.
Every Deptford postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. Deptford fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| SE8 | Deptford | Georgian terraces, post-war estates, new-build | Deptford sits wholly inside SE8, so Lewisham Council validates every drawing package submitted from an SE8 address. |
| SE4 | Brockley | Victorian and Edwardian terraces | Neighbouring Brockley, where drawing package work is handled by the same Lewisham Council case officers. |
| SE23 | Forest Hill | Victorian villas, Edwardian terraces | Neighbouring Forest Hill, where drawing package work is handled by the same Lewisham Council case officers. |
| SE23 | Honor Oak | Victorian villas, Edwardian terraces | Neighbouring Honor Oak, where drawing package work is handled by the same Lewisham Council case officers. |
| SE13 | Lewisham | Victorian terraces, post-war flats | Neighbouring Lewisham, where drawing package work is handled by the same Lewisham Council case officers. |
| SE3 | Blackheath | Georgian villas, Victorian terraces | Neighbouring Blackheath, where drawing package work is handled by the same Lewisham Council case officers. |
| SE6 | Catford | 1930s semi-detached, post-war flats | Neighbouring Catford, where drawing package work is handled by the same Lewisham Council case officers. |
| SE13 | Hither Green | Edwardian terraces, 1930s semi-detached | Neighbouring Hither Green, where drawing package work is handled by the same Lewisham Council case officers. |
| SE26 | Sydenham | Victorian villas, Edwardian terraces | Neighbouring Sydenham, where drawing package work is handled by the same Lewisham Council case officers. |
Roof pitch, wall build-up and plot depth change every few Deptford streets, and each one changes what a drawing package can achieve at that address.
Conservation areas covering Deptford: Lewisham Council runs 30, and Blackheath, Deptford High Street, Forest Hill are the ones Deptford owners meet most. A drawing package inside a Deptford conservation area loses permitted development, so the Deptford submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Deptford High Street a drawing package is judged on the street elevation first.
Deptford permitted development status: there is no borough-wide direction from Lewisham Council, so a drawing package at a SE8 address is normally still permitted development. We certify that with a £129 Lawful Development Certificate rather than leaving a Deptford sale to argue it later.
The building fabric around Deptford: 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. A drawing package in Deptford is scoped against that stock first. Our Deptford fixed fee starts at £840; the £1,750 Complete package runs the Deptford scheme through Lewisham Council planning and building control in one go.
Sources for this Deptford 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.
Fixed fee. MCIAT chartered. 98% first-time approval rate.
Start free quoteOr contact us about your project firstBefore you commit, it is worth understanding fixed fees, 30% below London architects and seeing why work with us. You can find your service to find the right fit, or set up your account to track your project. When you are ready, get a quote for your project — most homeowners have a fee in minutes — or contact us and a chartered technologist will be in touch.