Windows & doors in Merton: Planning Permission Guide
A guide to replacing windows and doors in Merton — when you need planning permission and typical costs.
Based on 70 decided applications in Merton over 12 months (68 granted, 2 refused).
Merton has conservation areas including Wimbledon Village, Wimbledon Common, Mitcham Cricket Green, and Cannizaro Park. Listed buildings cluster around Wimbledon Common and Merton Abbey Mills. Wimbledon Common is Metropolitan Common Land with its own byelaws near the edges. Article 4 Directions cover parts of Wimbledon Village. The borough has a mix of affluent Edwardian housing around Wimbledon and Victorian terrace stock in Mitcham and Colliers Wood.
Personalised odds
5 nearest comparables & refusal reasons for your address.
Get my report — £9See a sample →Recent windows & doors decisions in Merton
The 5 most recent decided applications. Addresses redacted to postcode area.
APPLICATION FOR VARIATION OF CONDITION 2 (APPROVED PLANS), 3 (MATERIALS), AND 4 (OBSCURED GLAZING) AND REMOVAL OF CONDITION 6 (SITE DRAIN…
ALTERATIONS TO THE EXISTING DOORS, WINDOWS AND OPENINGS, INCLUDING NEW REPLACEMENT DOORS, NEW WINDOWS TO EXISTING OPENINGS, THE LOWERING …
APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF REMOVING OF THE EXISTING STORE DOOR AND REPLACING IT WITH AN INSULATED FA…
APPLICATION FOR VARIATION OF CONDITIONS 2 (APPROVED PLANS) AND 13 ATTACHED TO LBM PLANNING PERMISSION 20/P1275 RELATING TO THE ERECTIO…
APPLICATION FOR DISCHARGE OF CONDITION 23 (WATER MAIN), CONDITION 30 (GREEN ROOF DETAILS), CONDITION 31 (ECOLOGY), CONDITION 33 (EAHP), C…
These are borough-wide. See the 5 nearest to your address.
Get my report — £9Permitted Development Rules
Replacing or adding windows/doors may need planning permission in conservation areas or for listed buildings.
Replacing windows and doors like-for-like generally doesn't need planning permission. However, in conservation areas or listed buildings, changes to the appearance of windows and doors may require consent.
Typical Costs in London
Window and door costs depend on the number of openings, material choice, and style.
Typical total
Typically includes
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Highly variable depending on number of windows, material (UPVC vs timber vs aluminium), and style. Per-window costs typically £500–£1,500.
Get a personalised cost estimate based on your actual windows & doors dimensions.
Get my estimateWhich Professionals Do You Need?
Window replacements rarely need professional services. Suppliers typically handle measurement, manufacture, and installation.
This project is unlikely to need specialist professional services beyond a competent builder.
This type of project does not typically require architectural services.
This guidance is based on a typical semi-detached house with no special constraints. Listed buildings, conservation areas, and attached properties may require additional professional input.
Find out exactly which professionals you need for your windows & doors.
Get personalised guidanceConservation Areas & Listed Buildings
In conservation areas, changing window materials (e.g. timber to UPVC) or styles may need planning permission. Listed buildings always need Listed Building Consent for any window or door changes.
Properties in conservation areas often have reduced permitted development rights. Some project types (like side extensions) lose PD rights entirely. An Article 4 Direction can remove additional PD rights.
Listed buildings (Grade I, II*, or II) have no permitted development rights at all. Any external alteration requires Listed Building Consent in addition to any planning permission. An architect experienced in heritage work is essential.
Check if your property is in a conservation area or has other planning constraints.
Check my propertyFrequently Asked Questions
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Run our free 2-minute check to see whether your project likely qualifies as permitted development in Merton. For personalised approval odds and nearby comparables, get the £9 report.
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