Garage Conversions · SE20 Anerley
Bromley controls SE20's conservation areas around Penge; SE20 is one of south-east London's most affordable period markets.
Working across the whole borough rather than just this area? See garage conversions in Bromley.
Converting a garage in Anerley reclaims it as a habitable room — home office, bedroom or kitchen-diner — on SE20's semi-detached and inter-war stock. Most garage conversions are Permitted Development, but Bromley Council expects the parking and street-scene impact considered, and Building Regulations cover insulation, damp-proofing and the new floor and walls.
Turn your unused Anerley garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulations drawings with Part L thermal compliance, structural calculations for any removed walls.
Across Penge, Anerley, Crystal Palace Park fringe in SE20, the dominant property is victorian and edwardian terraces and villas around penge and anerley, with mansion blocks and post-war pockets near the crystal palace park. That stock shapes what garage conversion drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Bromley Council judges each on design quality and neighbour impact. We survey the specific Anerley property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SE20 streetscape.
Housing stock in SE20: Victorian and Edwardian terraces and villas around Penge and Anerley, with mansion blocks and post-war pockets near the Crystal Palace park.
Within the district: Penge, Anerley, Crystal Palace Park fringe.
Streets we know in SE20: the Alexandra Cottages, the Penge High Street area, Maple Road and the Anerley streets. Each road has its own building line, boundary treatment and precedent that Bromley Council weighs when assessing a garage conversion drawings scheme.
Conservation areas: Alexandra Cottages, Penge High Street, Crystal Palace Park. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SE20: Penge West and Anerley on the Overground, plus Penge East and Kent House rail.
Property values: 294 sales completed inside SE20 last year. For scale, the whole of Bromley recorded 737 detached transactions in 2025, at a median of £910,000.
Borough character: Largest London borough by area; substantial Green Belt; conservation areas in most town centres; generally permissive elsewhere.
We check whether your Anerley garage conversion needs planning permission or qualifies as Permitted Development — most integral garages don't need planning.
Full laser-measured survey of the existing garage, plus adjacent rooms where walls are being removed.
Existing and proposed floor plans, elevations and sections at 1:50 — full council-ready specification.
Garage conversions must meet current energy-efficiency standards — upgraded insulation, glazing U-values, heating specification.
Steel beam and padstone design where garage doors are replaced with walls and windows, plus any load-bearing wall removals.
Full Plans submission to Bromley Council Building Control or an approved inspector with inspections coordinated through to completion certificate.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Victorian and Edwardian terraces and villas around Maple Road and the Anerley streets suit side-return, rear 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 Bromley's checklist.
Alexandra Cottages is a conservation area of distinctive Victorian model-housing with strong uniform character, so external changes there are tightly assessed on materials and form. We design sympathetically and submit a full application with a Heritage Statement where the designation applies.
Usually yes outside the conservation areas — a rear dormer or L-shape within the volume allowance, confirmed by a Lawful Development Certificate. Inside the Alexandra Cottages or Penge High Street designations, roof changes need full planning. We confirm which applies to your road.
The Overground link keeps demand strong.
Bromley Council charges its own statutory application fee (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every SE20 address.
For a SE20 project across Penge, Anerley, Crystal Palace Park 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 Bromley Council (8 weeks for a householder application). We carry the Anerley application through every officer query to the decision.
Anerley (SE20) sits primarily in Bromley, so applications are decided by Bromley Council. Conservation areas within SE20 include Alexandra Cottages, Penge High Street, Crystal Palace Park, 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 garage conversion drawings in Anerley — 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 Bromley Council Building Control or an approved inspector. On SE20'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. 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 SE20 homes.
Planning history and precedent stop at the borough line, so the comparable approvals nearby may sit elsewhere. See all services in SE9, SE12, SE26, BR1, BR2, BR3, BR6 and BR7.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SE20 postcode district we draw in, the stock that dominates it and the authority that validates a garage conversion there. SE20 fees below are the statutory England rates for 2026, not garage conversion estimates.
| Postcode | Area | Dominant stock | What it means for a garage conversion |
|---|---|---|---|
| SE20 | Anerley / Penge | Victorian and Edwardian terraces | SE20 straddles a boundary: Anerley / Penge addresses fall to Bromley Council or Croydon Council, so confirm which authority validates the garage conversion before submitting SE20 drawings. |
| SE20 | Penge | Victorian and Edwardian terraces | Penge sits inside SE20; garage conversion proposals here are determined by Bromley Council. |
| BR1 | Bromley / Bickley | Victorian terraces, Edwardian villas, post-war flats | Adjoining district to SE20, also inside Bromley for garage conversion purposes. |
| BR2 | Hayes / Keston | Victorian terraces, Edwardian villas, post-war flats | Adjoining district to SE20, also inside Bromley for garage conversion purposes. |
| BR3 | Beckenham | Edwardian villas, 1930s semi-detached | Adjoining district to SE20, also inside Bromley for garage conversion purposes. |
| SE19 | Upper Norwood / Crystal Palace | Victorian villas, Edwardian terraces | Adjoining district to SE20, also inside Croydon for garage conversion purposes. |
| SE25 | South Norwood / Selhurst | Victorian terraces | Adjoining district to SE20, also inside Croydon for garage conversion purposes. |
| CR0 | Croydon / Addiscombe / Shirley | Edwardian terraces, post-war flats | Adjoining district to SE20, also inside Croydon for garage conversion purposes. |
| CR2 | South Croydon | mixed stock | Adjoining district to SE20, also inside Croydon for garage conversion purposes. |
Roof pitch, wall build-up and plot depth change every few SE20 streets, and each one changes what a garage conversion can achieve at that address.
SE20 (Anerley / Penge) conservation designations: there are 48 across Bromley Council, Bickley, Bromley Town, Chislehurst among them. Designation costs a SE20 (Anerley / Penge) owner the permitted-development route: a garage conversion then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Beckenham is the SE20 (Anerley / Penge) designation that most often changes a garage conversion design.
Article 4 and your SE20 (Anerley / Penge) garage conversion: Bromley Council has made no borough-wide direction, so permitted development for a garage conversion in SE20 (Anerley / Penge) generally survives outside SE20 (Anerley / Penge) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SE20 owner records that a garage conversion was lawful.
SE20 (Anerley / Penge) 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 garage conversion route in SE20 (Anerley / Penge) — construction, not postcode, sets what is achievable. Bromley Council charges £548 for a householder application and has 8 weeks to determine it.
SE20 (Anerley / Penge) conservation designations: there are 24 across Croydon Council, Shirley Park, South Norwood, Crystal Palace among them. Designation costs a SE20 (Anerley / Penge) owner the permitted-development route: a garage conversion then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Old Coulsdon is the SE20 (Anerley / Penge) designation that most often changes a garage conversion design.
Article 4 and your SE20 (Anerley / Penge) garage conversion: Croydon Council has made no borough-wide direction, so permitted development for a garage conversion in SE20 (Anerley / Penge) generally survives outside SE20 (Anerley / Penge) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SE20 owner records that a garage conversion was lawful.
SE20 (Anerley / Penge) housing stock: Victorian villas in Upper Norwood and Crystal Palace; Edwardian terraces in Thornton Heath and Selhurst; 1930s semi-detached in Purley and Coulsdon; post-war in Croydon central. Large, mixed-density outer borough; permissive in outer areas; heritage controls in conservation pockets; major regeneration in central Croydon. Read that before choosing a garage conversion route in SE20 (Anerley / Penge) — construction, not postcode, sets what is achievable. Croydon Council charges £548 for a householder application and has 8 weeks to determine it.
Sources for this SE20 garage conversion 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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