Windows & doors in East Hertfordshire: Planning Permission Guide
A guide to replacing windows and doors in East Hertfordshire — when you need planning permission and typical costs.
Based on 26 decided applications in East Hertfordshire over 12 months (25 granted, 1 refused).
East Hertfordshire has 42 conservation areas — extensive heritage coverage restricting external alterations across many streets. Over 5,000 listed buildings recorded across the borough. Green Belt land covers parts of the borough.
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5 nearest comparables & refusal reasons for your address.
Get my report — £9See a sample →Recent windows & doors decisions in East Hertfordshire
The 5 most recent decided applications. Addresses redacted to postcode area.
Proposed internal and external alterations, including replacement of windows and external insulation
Erection of rear balcony at first floor level; removal of a window and replacement with a new door to provide access to the balcony.
Installation of two storey rear bay window extension and patio doors to side, alteration of side window.
Proposed first floor window to front elevation
Black cladding to first floor front gable and white upvc window replacements to all windows
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 East of 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–£1,300.
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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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