Sash Windows in Clapham

Clapham's Timber Window Specialists

Clapham is celebrated for its handsome Georgian and early Victorian architecture, particularly around Clapham Old Town and the streets radiating from Clapham Common. The grand stucco-fronted houses on The Pavement and North Side feature tall sash windows with slim glazing bars, while the Victorian terraces of Clapham South and Abbeville Village display classic bay windows with original timber frames. At Prime Sash Windows, we manufacture bespoke timber sash windows that honour Clapham's heritage while delivering modern thermal and acoustic performance.

Clapham contains several Conservation Areas managed by Lambeth Council, including Clapham Old Town, Abbeville Road, and Clapham High Street. Window replacements must closely replicate the original detailing — particularly the slim Georgian bar profiles and traditional horned sash design common to Clapham's Georgian stock. We work closely with Lambeth's planning department to ensure full compliance.

Why Clapham 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 Clapham

Clapham'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 Clapham 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 Clapham

We serve all areas of Clapham including Clapham Common North Side, The Pavement, Abbeville Road, Old Town, Crescent Lane, Grafton Square, and the streets surrounding Clapham Common. We also cover neighbouring areas including Battersea, Brixton, Balham, Stockwell, Kennington, and Wandsworth. Our workshop location allows prompt service throughout the SW4, SW8, SW9, SW11, and SW12 postcodes.