Planning drawings, building regulations, loft conversions, house extensions and mansards — delivered across Merton by MCIAT chartered technologists with deep knowledge of Merton Council's policies.
Merton puts 2,258 of its 3,320 householder applications on the map, 68.0% of the borough, at an 88.2% approval rate on decided cases. Twenty-five of its 243 groups are listed without a pin, and Merton shows how blunt that test is: Hillcross Avenue, the busiest name at 43 applications, spreads 462 metres — barely past the 400-metre line, and quite possibly one long road rather than two sharing a name. South Park Road, at 26, is the busiest the map places without that doubt. Merton also loses more records to coordinates outside Greater London than any other borough mapped here: 89. Source: Greater London Authority Planning London Datahub, householder planning applications, retrieved 3 September 2026. Contains public sector information licensed under the Open Government Licence v3.0.
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Merton approved 88.9% of the householder applications it decided in the three years to March 2026 and refused 278 of 2,494. It withdrew just 3.7% before decision and issued only 156 lawful development certificates — a strikingly low count that pushes more Merton work through a full application.
| Measure | Merton | London |
|---|---|---|
| Householder approval rate | 88.9% | 83.0% |
| Householder decisions made | 2,494 | 77,680 |
| Decided inside eight weeks | 91.4% | — |
| Lawful development certificates issued | 156 | — |
| Applications withdrawn before decision | 3.7% | 7.4% |
| Rear dormer applications in the Datahub | 1,900 | 85% approved |
| Householder appeals allowed after refusal | 36.5% of 211 | 40.8% of 13,067 |
Sources: rows one to five and seven from MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026, and Planning Inspectorate casework decided 2016–2026. Row six from the Planning London Datahub, retrieved 15 August 2026 — phrase-matched descriptions, comparable within Merton only. Open Government Licence v3.0.
Services available in MertonA construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...
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Chartered structural engineer calculations for every residential intervention in Merton — steel beams, lintels, pad foundations, wall re...
Measured surveys across Merton — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...
End-to-end Party Wall Act 1996 service for Merton — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Merton property,...


Housing stock: Victorian villas in Wimbledon; Edwardian terraces in Tooting and Colliers Wood; 1930s semi-detached in Morden and Raynes Park; post-war flats in Mitcham.
Character: Wimbledon is heavily conservation-controlled; outer Merton (Morden, Mitcham) is permissive.
Notable conservation areas: Wimbledon Village, John Innes, Mitcham Cricket Green, Wimbledon Common

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...
Every loft type across every Merton roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...
Merton's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...
Turn your unused Merton garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...
Full architectural technology service for basement digs and cellar conversions in Merton — structural underpinning design, waterproofing...
Chartered structural engineer calculations for every residential intervention in Merton — steel beams, lintels, pad foundations, wall re...
Measured surveys across Merton — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...
End-to-end Party Wall Act 1996 service for Merton — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Merton property,...
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Every Merton postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. Merton fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | A drawing package in Wimbledon / Colliers Wood may land with Merton Council or Wandsworth Council — SW19 crosses the boundary, and the SW19 policies map decides it street by street. |
| SW20 | Raynes Park | Victorian villas, Edwardian terraces | SW20 covers Raynes Park only; Merton Council handles the drawing package, and Raynes Park case officers apply the SW20 conservation-area map. |
| SM4 | Morden | 1930s semi-detached, post-war flats | SM4 covers Morden only; Merton Council handles the drawing package, and Morden case officers apply the SM4 conservation-area map. |
| CR4 | Mitcham | 1930s semi-detached, post-war estates | Mitcham sits wholly inside CR4, so Merton Council validates every drawing package submitted from an CR4 address. |
| SW16 | Streatham / Norbury | Edwardian terraces, post-war flats | SW16 straddles a boundary: Streatham / Norbury addresses fall to Lambeth Council or Wandsworth Council or Merton Council or Croydon Council, so confirm which authority validates the drawing package before submitting SW16 drawings. |
| SW17 | Tooting / Earlsfield | Edwardian terraces | SW17 straddles a boundary: Tooting / Earlsfield addresses fall to Wandsworth Council or Merton Council, so confirm which authority validates the drawing package before submitting SW17 drawings. |
Roof pitch, wall build-up and plot depth change every few Merton streets, and each one changes what a drawing package can achieve at that address.
Merton conservation designations: there are 28 across Merton Council, Wimbledon Common, Wimbledon Village, John Innes among them. Designation costs a Merton owner the permitted-development route: a drawing package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Wimbledon Common is the Merton designation that most often changes a drawing package design.
Merton permitted development status: there is no borough-wide direction from Merton Council, so a drawing package at a SW19 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Merton sale to argue it later.
Merton housing stock: 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. Read that before choosing a drawing package route in Merton — construction, not postcode, sets what is achievable. Merton Council charges £548 for a householder application and has 8 weeks to determine it.
Sources for this Merton 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.
Over the 12 quarters from 2023 Q2 to 2026 Q1, Merton decided 2,494 householder planning applications and approved 88.9% of them — 5.9 percentage points above the London average of 83%. That places Merton 8th of 32 London boroughs on householder approval rate. These are decisions the council reported to MHCLG, not our own sample.
| Measure | Merton | Context |
|---|---|---|
| Householder applications decided | 2,494 | 77,680 across London |
| Householder approval rate | 88.9% | 83% London average |
| Decided within 8 weeks | 91.4% | 19th fastest of 32 boroughs |
| Took longer than 13 weeks | 0.3% | the applications that overran the statutory target |
| Minor dwellings approval rate | 62.3% | new-build and conversion schemes under 10 units |
| All application types | 85.5% | across 3,611 decisions |
| Certificates of lawfulness issued | 156 | confirmations that work was permitted development |
Speed matters as much as the odds. Merton decided 91.4% of householder applications inside the eight-week statutory period and let 0.3% run past thirteen weeks. A drawing package that is complete and correctly described at validation is the part of that timeline you control; the rest belongs to the council's caseload.
Source: MHCLG District Planning Application Statistics (PS1 and PS2), 2023 Q2 to 2026 Q1, published quarterly by the Ministry of Housing, Communities and Local Government. Counts are decisions made in the window, not applications submitted. Contains public sector information licensed under the Open Government Licence v3.0.
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Get my free quote →We've delivered architectural drawings across every part of Merton. Each neighbourhood has its own conservation context and dominant housing stock — click through for area-specific guidance.