Garage Conversions · SW20 Raynes Park
Fixed-fee garage conversion drawings for Raynes Park, West Wimbledon, Cottenham Park, Motspur Park fringe in the SW20 postcode, drawn by an MCIAT-chartered architectural technologist and submitted to Merton Council. Merton applies suburban householder control across SW20, with a conservation pocket around Cottenham Park; a settled 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.
Converting a garage in Raynes Park reclaims it as a habitable room — home office, bedroom or kitchen-diner — on SW20's semi-detached and inter-war stock. Most garage conversions are Permitted Development, but Merton 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 Raynes Park 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, all fixed fee.
Across Raynes Park, West Wimbledon, Cottenham Park, Motspur Park fringe in SW20, the dominant property is inter-war and edwardian semis and detached houses around raynes park and west wimbledon, with larger houses toward wimbledon common. 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 Merton Council judges each on design quality and neighbour impact. We survey the specific Raynes Park property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SW20 streetscape.
Housing stock in SW20: Inter-war and Edwardian semis and detached houses around Raynes Park and West Wimbledon, with larger houses toward Wimbledon Common.
Within the district: Raynes Park, West Wimbledon, Cottenham Park, Motspur Park fringe.
Streets we know in SW20: the Cottenham Park roads, Coombe Lane, Grand Drive and the West Barnes streets. Each road has its own building line, boundary treatment and precedent that Merton Council weighs when assessing a garage conversion drawings scheme.
Conservation areas: Cottenham Park, Wimbledon West Side fringe. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SW20: Raynes Park and Motspur Park rail to Waterloo, plus Wimbledon nearby for the District line and tram.
Property values: around £400,000 for a flat and £800,000-£1.3m for a house — a useful gauge of the build value an extension or loft adds in SW20.
Borough character: Wimbledon is heavily conservation-controlled; outer Merton (Morden, Mitcham) is permissive.
We check whether your Raynes Park 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 Merton 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 inter-war and Edwardian semis and detached houses around Cottenham Park and Grand Drive suit rear, side and double-storey extensions plus loft conversions, much of it within Permitted Development outside the conservation area, confirmed with a Lawful Development Certificate. We confirm the route and draw to Merton's checklist.
Often, on the wider semi and detached plots around Coombe Lane — a two-storey side or rear extension, subject to Merton's design and neighbour-amenity policy on side-space and daylight. We design within those limits and produce the planning and Building Regulations drawings together.
Usually yes on the semis — a hip-to-gable plus rear dormer within the volume allowance, confirmed by a Lawful Development Certificate, provided you're not in the Cottenham Park conservation area. We check the constraints for your road and draw it for Building Control.
With SW20 houses around £800,000-£1.3m and direct rail links to Waterloo, a rear extension or loft adds family space worth comfortably above the build and drawing cost. SW20 is a sought-after family suburb, and our fixed fee keeps the professional cost predictable.
Our fixed fee for garage conversion drawings in Raynes Park starts at £995 — no hourly billing. With Raynes Park property at around £400,000 for a flat and £800,000-£1.3m for a house, the professional drawing fee is a small fraction of the value the work adds to SW20's inter-war and edwardian semis and detached houses. Merton 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 SW20 address.
For a SW20 project across Raynes Park, West Wimbledon, Cottenham Park, Motspur 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 Merton Council (8 weeks for a householder application). We carry the Raynes Park application through every officer query to the decision.
Raynes Park (SW20) sits primarily in Merton, so applications are decided by Merton Council. Article 4 in force in the borough: No. Conservation areas within SW20 include Cottenham Park, Wimbledon West Side fringe, 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 Raynes Park — 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 Merton Council Building Control or an approved inspector. On SW20'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 Raynes Park (SW20) property at around £400,000 for a flat and £800,000-£1.3m 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 £995 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 SW20 homes.
From £840.
From £840.
From £1,225.
From £1,225.
From £1,575.
From £1,950.
From £350.
From £540.
From £450.
From £1,225.
Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.
Every SW20 postcode district we draw in, the stock that dominates it and the authority that validates a garage conversion there. SW20 fees below are the statutory England rates for 2026, not garage conversion estimates.
| Postcode | Area | Dominant stock | What it means for a garage conversion |
|---|---|---|---|
| SW20 | Raynes Park | Victorian villas, Edwardian terraces | SW20 covers Raynes Park only; Merton Council handles the garage conversion, and Raynes Park case officers apply the SW20 conservation-area map. |
| SW20 | Wimbledon | Victorian villas, Edwardian terraces | Wimbledon sits inside SW20; garage conversion proposals here are determined by Merton Council. |
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | Adjoining district to SW20, also inside Merton for garage conversion purposes. |
| SM4 | Morden | 1930s semi-detached, post-war flats | Adjoining district to SW20, also inside Merton for garage conversion purposes. |
| CR4 | Mitcham | 1930s semi-detached, post-war estates | Adjoining district to SW20, also inside Merton for garage conversion purposes. |
Roof pitch, wall build-up and plot depth change every few SW20 streets, and each one changes what a garage conversion can achieve at that address.
SW20 (Raynes Park) conservation designations: there are 28 across Merton Council, Wimbledon Village, John Innes, Mitcham Cricket Green among them. Designation costs a SW20 (Raynes Park) owner the permitted-development route: a garage conversion then needs a £258 householder application over 8 weeks, in place of the £120 prior approval route that takes 6 weeks. Wimbledon Village is the SW20 (Raynes Park) designation that most often changes a garage conversion design.
Article 4 and your SW20 (Raynes Park) garage conversion: Merton Council has made no borough-wide direction, so permitted development for a garage conversion in SW20 (Raynes Park) generally survives outside SW20 (Raynes Park) conservation areas and listed curtilages. A Lawful Development Certificate at £129 is how a SW20 owner records that a garage conversion was lawful.
What SW20 (Raynes Park) is built from: Victorian villas in Wimbledon; Edwardian terraces in Tooting and Colliers Wood; 1930s semi-detached in Morden and Raynes Park; post-war flats in Mitcham. Wimbledon is heavily conservation-controlled; outer Merton (Morden, Mitcham) is permissive. That mix decides the garage conversion route in SW20 (Raynes Park) more than the postcode does. Our fixed fee for garage conversions in SW20 (Raynes Park) starts at £995, against £1,750 for the Complete package that carries a SW20 (Raynes Park) scheme through Merton Council planning and building regulations together.
Sources for this SW20 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.
Free fixed quote in 60 seconds. From £995. MCIAT chartered.
Get my free quote →Or 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.
