Rear Dormer Loft Conversions · SE9 Eltham
Fixed-fee rear dormer drawings for Eltham, Mottingham, Eltham Park, New Eltham fringe in the SE9 postcode, drawn by an MCIAT-chartered architectural technologist and submitted to Greenwich Council. Greenwich controls the historic Progress Estate and the Eltham Palace setting; SE9 is a settled, affordable inter-war family market.
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.
A rear dormer is the workhorse loft conversion on SE9's terraces in Eltham — a box across the rear roof slope adding a double bedroom and bathroom while keeping the front roofline intact for the street. Most rear dormers near Eltham, Mottingham, Eltham Park, New Eltham fringe are Permitted Development, which we confirm with Greenwich Council via a Lawful Development Certificate.
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Eltham property, building regulations, structural steelwork and Party Wall notices, all fixed fee.
Across Eltham, Mottingham, Eltham Park, New Eltham fringe in SE9, the dominant property is inter-war semis and detached houses across eltham and mottingham, with the historic core around eltham palace and pockets of post-war estate. That stock shapes what rear dormer drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Greenwich Council judges each on design quality and neighbour impact. We survey the specific Eltham property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SE9 streetscape.
Housing stock in SE9: Inter-war semis and detached houses across Eltham and Mottingham, with the historic core around Eltham Palace and pockets of post-war estate.
Within the district: Eltham, Mottingham, Eltham Park, New Eltham fringe.
Streets we know in SE9: the Eltham Park and Progress Estate roads, Court Road, Glenesk Road and the Well Hall streets. Each road has its own building line, boundary treatment and precedent that Greenwich Council weighs when assessing a rear dormer drawings scheme.
Conservation areas: Progress Estate (Well Hall), Eltham Palace, Eltham High Street. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SE9: Eltham, Mottingham and New Eltham rail to London Bridge, Cannon Street and Victoria.
Property values: around £300,000 for a flat and £500,000-£800,000 for a house — a useful gauge of the build value an extension or loft adds in SE9.
Borough character: World Heritage Site status in Greenwich town centre adds heritage weight; outer borough areas (Eltham, Thamesmead) generally permissive.
We confirm whether your Eltham rear dormer qualifies for Permitted Development — checking volume limits (40m³ terraced, 50m³ semi/detached), Article 4, conservation area and prior extension history.
If PD applies, we obtain a Lawful Development Certificate for certainty. If not, we submit full planning with Design & Access Statement to Greenwich Council.
Full-width flat-roof rear dormer with matching materials, set in from party walls, cheeks clad to match existing roof — the design that Greenwich Council approves most readily.
Part B fire escape (protected staircase, fire doors, smoke alarms), Part K staircase, Part L insulation, Part E acoustic separation.
Steel ridge beam, purlin supports, dormer framing, floor joist upgrade — chartered engineer sign-off for Building Control.
Most rear dormers in Eltham's terraced streets trigger Section 6 Party Wall notices. We draft, serve and coordinate the process.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The inter-war semis and detached houses around Court Road and Glenesk Road suit rear, side and loft extensions, much of it within Permitted Development outside the conservation areas, confirmed with a Lawful Development Certificate. We confirm the route and draw to Greenwich's checklist.
The Progress Estate is a celebrated First World War garden-suburb conservation area with strong, uniform arts-and-crafts character, so external changes there are tightly assessed on materials, render and roofs. We design sympathetically and submit a full application with a Heritage Statement where the designation applies.
Usually yes on the inter-war semis — a hip-to-gable plus rear dormer within the volume allowance, confirmed by a Lawful Development Certificate, provided you're not in the Progress Estate or another conservation area. We check the constraints for your road and draw it for Building Control.
With SE9 houses around £500,000-£800,000, Eltham offers strong south-east London value, and a rear extension or loft adds family space worth well above the build and drawing cost. Our fixed fee keeps the professional cost predictable on these inter-war houses.
Our fixed fee for rear dormer drawings in Eltham starts at £1,225 — no hourly billing. With Eltham property at around £300,000 for a flat and £500,000-£800,000 for a house, the professional drawing fee is a small fraction of the value the work adds to SE9's inter-war semis and detached houses across eltham. Greenwich Council charges its own statutory application fee on top (currently £258 for a householder planning application, £578 for a full application). We quote the drawings as one fixed price and the free site survey covers every SE9 address.
For a SE9 project across Eltham, Mottingham, Eltham Park, New Eltham fringe, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Greenwich Council (8 weeks for a householder application). We carry the Eltham application through every officer query to the decision.
Eltham (SE9) sits primarily in Greenwich, so applications are decided by Greenwich Council. Article 4 in force in the borough: No. Conservation areas within SE9 include Progress Estate (Well Hall), Eltham Palace, Eltham High Street, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind rear dormer drawings in Eltham — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Greenwich Council Building Control or an approved inspector. On SE9's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. With Eltham (SE9) property at around £300,000 for a flat and £500,000-£800,000 for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value, while our fixed drawing fee from £1,225 keeps the professional cost predictable. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on SE9 homes.
From £840.
From £840.
From £1,225.
From £1,225.
From £1,575.
From £995.
From £1,950.
From £350.
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From £450.
Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.
Every SE9 postcode district we draw in, the stock that dominates it and the authority that validates a rear dormer there. SE9 fees below are the statutory England rates for 2026, not rear dormer estimates.
| Postcode | Area | Dominant stock | What it means for a rear dormer |
|---|---|---|---|
| SE9 | Eltham / Mottingham | 1930s semi-detached, post-war flats | SE9 straddles a boundary: Eltham / Mottingham addresses fall to Greenwich Council or Bromley Council, so confirm which authority validates the rear dormer before submitting SE9 drawings. |
| SE9 | Eltham | 1930s semi-detached, post-war flats | Eltham sits inside SE9; rear dormer proposals here are determined by Greenwich Council. |
| SE9 | New Eltham | 1930s semi-detached | New Eltham sits inside SE9; rear dormer proposals here are determined by Greenwich Council. |
| SE2 | Abbey Wood | mixed stock | Adjoining district to SE9, also inside Greenwich for rear dormer purposes. |
| SE3 | Blackheath / Kidbrooke | Georgian villas, Victorian terraces | Adjoining district to SE9, also inside Greenwich for rear dormer purposes. |
| SE7 | Charlton | Victorian villas, 1930s semi-detached | Adjoining district to SE9, also inside Greenwich for rear dormer purposes. |
| SE20 | Anerley / Penge | Victorian and Edwardian terraces | Adjoining district to SE9, also inside Bromley for rear dormer purposes. |
| BR1 | Bromley / Bickley | Victorian terraces, Edwardian villas, post-war flats | Adjoining district to SE9, also inside Bromley for rear dormer purposes. |
| BR2 | Hayes / Keston | Victorian terraces, Edwardian villas, post-war flats | Adjoining district to SE9, also inside Bromley for rear dormer purposes. |
| BR3 | Beckenham | Edwardian villas, 1930s semi-detached | Adjoining district to SE9, also inside Bromley for rear dormer purposes. |
Roof pitch, wall build-up and plot depth change every few SE9 streets, and each one changes what a rear dormer can achieve at that address.
Conservation areas covering SE9 (Eltham / Mottingham): Greenwich Council runs 20, and Charlton, Eltham Park, Greenwich Town Centre (World Heritage Site) are the ones SE9 (Eltham / Mottingham) owners meet most. A rear dormer inside a SE9 (Eltham / Mottingham) conservation area loses permitted development, so the SE9 (Eltham / Mottingham) submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Eltham Park a rear dormer is judged on the street elevation first.
SE9 (Eltham / Mottingham) permitted development status: there is no borough-wide direction from Greenwich Council, so a rear dormer at a SE9 address is normally still permitted development. We certify that with a £129 Lawful Development Certificate rather than leaving a SE9 (Eltham / Mottingham) sale to argue it later.
SE9 (Eltham / Mottingham) housing stock: Georgian in Greenwich town centre; Victorian terraces in East Greenwich, Charlton; inter-war semi-detached in Eltham; new-build along the riverside. World Heritage Site status in Greenwich town centre adds heritage weight; outer borough areas (Eltham, Thamesmead) generally permissive. Read that before choosing a rear dormer route in SE9 (Eltham / Mottingham) — construction, not postcode, sets what is achievable. Rear dormers in SE9 (Eltham / Mottingham) start at £1,225 on a fixed fee, or £1,750 for the Complete package covering both Greenwich Council submissions.
Conservation areas covering SE9 (Eltham / Mottingham): Bromley Council runs 48, and Chislehurst, Beckenham, Keston are the ones SE9 (Eltham / Mottingham) owners meet most. A rear dormer inside a SE9 (Eltham / Mottingham) conservation area loses permitted development, so the SE9 (Eltham / Mottingham) submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Chislehurst a rear dormer is judged on the street elevation first.
SE9 (Eltham / Mottingham) permitted development status: there is no borough-wide direction from Bromley Council, so a rear dormer at a SE9 address is normally still permitted development. We certify that with a £129 Lawful Development Certificate rather than leaving a SE9 (Eltham / Mottingham) sale to argue it later.
SE9 (Eltham / Mottingham) housing stock: Large 1930s detached and semi-detached in Chislehurst and Bickley; Edwardian in Beckenham; Victorian in Bromley town; Metropolitan Green Belt covers significant rural-fringe land. Largest London borough by area; substantial Green Belt; conservation areas in most town centres; generally permissive elsewhere. Read that before choosing a rear dormer route in SE9 (Eltham / Mottingham) — construction, not postcode, sets what is achievable. Rear dormers in SE9 (Eltham / Mottingham) start at £1,225 on a fixed fee, or £1,750 for the Complete package covering both Bromley Council submissions.
Sources for this SE9 rear dormer 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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