Sash Windows in Greenwich

Greenwich's Timber Window Specialists

Greenwich is a UNESCO World Heritage Site with an extraordinary collection of Georgian, Regency, and Victorian architecture. The streets around Greenwich Park — particularly Crooms Hill, Gloucester Circus, and the Fan Area — contain some of London's finest period townhouses with original twelve-over-twelve and six-over-six sash windows. Blackheath extends this heritage with grand Victorian and Edwardian villas. At Prime Sash Windows, we manufacture bespoke timber sash windows that honour Greenwich's heritage while delivering modern thermal and acoustic performance.

As a World Heritage Site, Greenwich has some of the strictest planning controls in London. The Royal Borough's Conservation Areas cover much of central Greenwich and Blackheath. Replacement windows must precisely replicate original proportions, glazing bar widths, meeting rail profiles, and horn details. We have completed installations in Greenwich's most sensitive locations and work closely with conservation officers to ensure compliance.

Why Greenwich Homeowners Choose Us

Every window is manufactured in our workshop near London from engineered Accoya or premium hardwood. Accoya is guaranteed for 50 years against rot and fungal decay — far outlasting uPVC, which typically degrades within 20 to 25 years and cannot be repaired.

• Slimline double glazing — 4/16/4 sealed units with warm-edge spacer bars. U-value 1.4 W/m²K. Part L compliant.
• PAS24 security — multi-point espagnolette locking on all opening sashes.
• Traditional lead weights — we never use spring balances. Smoother operation, longer lifespan.
• Any colour — over 2,000 RAL colours and the full Farrow & Ball range. Dual colour available.
• 4–5 week delivery — manufactured in our UK workshop, not imported. Standard configurations delivered in 4–5 weeks.
• FENSA registered — Building Regulations self-certification and certificate on completion.

Every window is spray-finished with premium Sikkens coatings — a multi-coat system including primer, undercoat, and topcoat for a flawless, lasting finish.

Conservation Areas in Greenwich

Greenwich's Conservation Areas require careful attention to original window details. Listed buildings and protected properties need like-for-like replacements with specific glazing bar profiles, horn details, and putty-line sightlines. We produce windows with authentic slim meeting rails, ovolo or chamfer beading profiles, and run-through horns that match original period detailing.

We handle the paperwork too. Where planning permission is required, we supply detailed drawings and specifications. For most replacements in non-listed properties, our FENSA registration means no separate Building Control application is needed.

What We Offer

• Box sash windows — traditional double-hung sash windows with cords and lead weights.
• Casement windows — flush casement and stormproof designs for Arts and Crafts and modern properties.
• Slim Georgian bars — authentic planted or run-through glazing bars.
• Arched and shaped windows — gothic, segmental, and true-arch heads.
• Secondary glazing — for Listed buildings where external changes are restricted.

How It Works

• 1. Design online — Use our 3D configurator to design and price your windows instantly.
• 2. Free survey — We visit your Greenwich property, measure precisely, and confirm the specification.
• 3. Manufacture — Your windows are built in our workshop. Typical lead time 4–5 weeks.
• 4. Installation — Our FENSA-certified fitting team installs your windows with minimal disruption.

Areas We Cover in Greenwich

We serve all areas of Greenwich including Crooms Hill, Gloucester Circus, the Fan Area, Royal Hill, Point Hill, Blackheath Village, and the streets around Greenwich Park. We also cover neighbouring areas including Blackheath, Deptford, Lewisham, Woolwich, Charlton, and Eltham. Our workshop location allows prompt service throughout the SE3, SE7, SE10, SE12, and SE18 postcodes.