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 63 decided applications in Merton over 12 months (62 granted, 1 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.
Recent windows & doors decisions in Merton
The 5 most recent decided applications. Addresses redacted to postcode area.
Alteration to 2x windows and panelling at Flat 2, Brook House, 1 Prince's Road SW19 8RQ.
New signage and entrance doors to shop front, and high level, replacement projecting signs
PROPOSED UPGRADING OF 77 x. FLAT ENTRANCE DOORS TO ACHIEVE EQUIVALENCE OF FD30S FIRE RATING. PROPOSED WORKS TO THE DOORS INCLUDE: - REP…
RECONFIGURATION OF LISTED BUILDING, NEW PROPOSED HERITAGE DOUBLE DOORS INTO COURTYARD FROM LIVING AREA TO REPLACE EXISTING WINDOW, AND 4…
ADVERT CONSENT FOR 1 X FASCIA SIGN AND VINYL WINDOW GRAPHICS.
These are borough-wide. See the 5 nearest to your address.
Check your address freePermitted 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
Typically excludes
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
Just want a quick yes/no for your windows & doors?
Run our free 2-minute check to see whether your project likely qualifies as permitted development in Merton — your address, your constraints, your council's own recent decisions.
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