Windows & doors in Canterbury: Planning Permission Guide
A guide to replacing windows and doors in Canterbury — when you need planning permission and typical costs.
Based on 42 decided applications in Canterbury over 12 months (38 granted, 4 refused).
Canterbury includes or borders the Kent Downs AONB, the Canterbury Cathedral, St. Augustine's Abbey and St. Martin's Church World Heritage Site — properties in or near those areas are on Article 1(5) land where permitted-development rights are restricted. Canterbury has 98 conservation areas — extensive heritage coverage restricting external alterations across many streets. 463 Article 4 directions are in force — pre-application advice strongly recommended before any external work. 3,760 listed buildings recorded.
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5 nearest comparables & refusal reasons for your address.
Get my report — £9See a sample →Recent windows & doors decisions in Canterbury
The 5 most recent decided applications. Addresses redacted to postcode area.
Replacement rear door and windows from timber to uPVC.
Replacement of all windows from timber to UPVC.
Replacement of windows from timber to UPVC to front elevation.
Replacement window to first-floor front elevation from timber to uPVC with double glazing.
Replacement of roof, doors and windows to glazed link with associated rainwater goods, new veranda, insertion of stove flue and cowl into…
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 South East England
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 £450–£1,400.
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.
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Run our free 2-minute check to see whether your project likely qualifies as permitted development in Canterbury. For personalised approval odds and nearby comparables, get the £9 report.
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