Richmond TW9 · Conservation Area
Richmond Green Conservation Windows.
Why Richmond Green is different
The streets around Richmond Green form one of the most architecturally rich pockets in London — Maids of Honour Row, Old Palace Lane, the green itself, and the Victorian streets running off into Richmond town centre. Most of this area sits within the Central Richmond Conservation Area, designated by Richmond Council, with a high concentration of Grade II and Grade II* listings on the Georgian frontages.
Unlike Bedford Park (Article 4) or Strawberry Hill (Grade I villa with cluster of listings), most non-listed dwelling houses around Richmond Green retain Permitted Development rights for like-for-like window replacement. That makes the planning environment notably friendlier — but the conservation area context still means visible material changes, anything affecting flats, or any work to listed buildings always needs proper consent. Confirm your address with Richmond Council Planning before any work.
What's allowed, what isn't
Practical guidance for non-listed dwelling houses around Richmond Green. Listed properties always require Listed Building Consent. Flats and maisonettes always require planning permission for window changes regardless of like-for-like status.
| Specification | Front / street-visible | Side / rear elevation |
|---|---|---|
| Timber sash with secondary glazing | Normally permitted (PD) | Normally permitted |
| Heritage uPVC sash, run-through horns | Often approved on side, case-by-case on front | Routinely approved |
| Slim aluminium casement | Refused on principal frontages | Approved on rear extensions |
| Slim aluminium sliding doors | N/A on front | Routinely approved on rear |
| Smart Aluspace SR (steel-look) | Refused on Georgian frontages | Approved on rear extensions |
| Visible-from-street modern uPVC casement | Refused | Refused if visible from public realm |
| Modern thick aluminium frames front | Refused | Approved on contemporary rear extensions |
Recommended systems
Specifications consistent with Richmond Council's conservation guidance and the architectural character of the green and its surrounding streets.
| System | Best for | Approval pattern |
|---|---|---|
| Timber sliding sash (Accoya / hardwood) | Front elevations, all listed buildings | Reliable approval |
| Heritage uPVC sash with run-through horns | Side, rear, value-led replacements | Routinely approved on non-front elevations |
| Internal secondary glazing | Listed properties, acoustic upgrades | Reversible — heritage-friendly |
| Slim aluminium sliders / casement | Rear extensions, garden rooms | Routinely approved |
| Smart Aluspace SR steel-look | Contemporary rear extensions | Approved as modern intervention |
Richmond Green window prices
Fitted prices for window replacement around Richmond Green TW9, Q2 2026. All include VAT, frame, slim or standard double-glazed units, fitting, removal of old window, internal and external silicone, and FENSA self-certification (Reg 40373) where applicable.
| Specification | Application | Low | High |
|---|---|---|---|
| Heritage timber sash (Accoya, slim DGU) | Front elevation, period property | £2,400 | £3,800 |
| Heritage timber sash, standard size | Upper floors, side bays | £1,800 | £2,800 |
| uPVC Heritage sash, run-through horns | Side / rear elevations | £950 | £1,650 |
| Slim aluminium casement | Rear extension | £1,200 | £2,200 |
| Slimline aluminium sliding door | Rear, garden-facing | £4,500 | £9,000 |
| Internal secondary glazing | Listed buildings | £600 | £1,400 |
| Vacuum-glazed retrofit (existing frame) | Listed properties | £700 | £1,400 |
Frequently asked
Is Richmond Green a conservation area?
Yes — the streets surrounding Richmond Green sit within the Central Richmond Conservation Area, designated and managed by Richmond Council. The area combines Georgian terraces, Victorian additions, and 18th-century survivals around the historic green itself. Conservation area status restricts demolition, protects trees, and gives Richmond planners discretion over alterations visible from the public realm — but unlike Bedford Park or some Belgravia streets, there is not typically an Article 4 Direction blanket-removing PD rights for windows on standard dwelling houses.
Do I need planning permission for windows around Richmond Green?
For non-listed dwelling houses without an Article 4 Direction, like-for-like window replacement is normally Permitted Development under the General Permitted Development Order. However, the conservation area location means visible material changes (e.g. timber to uPVC, casement to sash) are scrutinised, and any change to a flat or maisonette always requires planning permission. Listed buildings always require Listed Building Consent. Verify your specific address with Richmond Council Planning before ordering.
Can I have uPVC windows around Richmond Green?
Heritage uPVC sash with run-through horns is often approved on side and rear elevations of non-listed properties around Richmond Green, particularly where the original timber frames are beyond economic repair. uPVC visible from the green or from a key public viewpoint is more carefully reviewed and may be refused in favour of timber. Smooth-finish modern white uPVC is rarely accepted on principal elevations.
What's allowed on rear extensions in Richmond Green?
Slim aluminium casements, slimline aluminium sliding doors, and steel-look heritage systems such as Smart Aluspace SR are routinely approved on rear extensions in the Central Richmond Conservation Area where they're not visible from the public realm. The rear extension itself may need planning permission depending on size — Richmond's householder PD limits and conservation area restrictions apply.
How much do sash windows cost around Richmond Green?
Sash window replacement around Richmond Green costs £1,800–£3,800 per window fitted in 2026, depending on size, material (engineered hardwood or Accoya for timber, heritage uPVC for value), and whether the original glazing bars and run-through horns are reinstated. Bay windows, oriels, and stained-glass top lights carry additional cost. All include slim double-glazed units and Richmond-area FENSA registration.
Are most properties around Richmond Green listed?
Many properties facing Richmond Green and the immediate surrounding streets are individually listed Grade II or II*, particularly the Georgian terraces along Maids of Honour Row, Old Palace Lane, and the streets backing onto the green. If your property is listed, Listed Building Consent is required for any window change in addition to (or instead of) planning permission. Check Historic England's National Heritage List for England against your address.
Can I install secondary glazing on a Richmond Green property?
Yes — internal secondary glazing is one of the most heritage-friendly solutions for sash windows around Richmond Green. It's reversible, doesn't alter the external appearance, and typically avoids planning or Listed Building Consent on listed properties (though always confirm with Richmond Council heritage officers before ordering). Acoustic and thermal performance is genuinely good with modern slim-frame secondary systems.
Who handles the Richmond Council planning application?
Apex Glazing surveys the property, prepares like-for-like elevation drawings, and supplies the technical specification needed for a Richmond Council householder planning or LBC application. The application itself is normally submitted by the homeowner or their planning agent through the Planning Portal. We coordinate closely with local heritage architects and submit our supporting technical drawings as part of the package.
