Sash Windows in Kensington

Kensington's Timber Window Specialists

Kensington is home to some of London's finest period architecture. The white stucco-fronted terraces of Holland Park, the grand Victorian mansions along Palace Gardens Terrace, and the elegant Italianate villas of Kensington Square demand windows of the highest calibre. At Prime Sash Windows, we manufacture bespoke timber sash windows that match the exacting standards Kensington properties require.

The Royal Borough of Kensington and Chelsea maintains strict planning controls across its many Conservation Areas — including the De Vere, Kensington Square, Kensington Court, and Ladbroke Conservation Areas. Window replacements in these zones must replicate original profiles, proportions, and detailing. Our craftsmen produce authentic slim meeting rails, period-correct glazing bar profiles, and traditional horn details that satisfy RBKC heritage officers.

Why Kensington Homeowners Choose Us

Every window is manufactured from engineered Accoya or premium hardwood — guaranteed for 50 years against rot and fungal decay. We use traditional construction methods: mortise-and-tenon joints, lead counterweights, and hand-fitted draught seals.

• Slimline double glazing — 4/16/4 sealed units, U-value 1.4 W/m²K. Part L compliant.
• PAS24 security — multi-point espagnolette locking on all opening sashes.
• Traditional lead weights — smoother operation, longer lifespan than spring balances.
• Any colour — 2,000+ RAL colours, full Farrow & Ball range. Dual colour available.
• FENSA registered — Building Regulations self-certification on completion.

Every window is spray-finished with premium Sikkens coatings for a flawless, lasting finish.

Listed Buildings & Conservation Areas

Many Kensington properties are Grade II or Grade II* listed. We produce windows that meet English Heritage and Historic England requirements — replicating original timber sections, glazing patterns, and decorative mouldings. Where planning permission is required, we supply detailed drawings and heritage statements. For non-listed properties, our FENSA registration means no separate Building Control application is needed.

Areas We Cover in Kensington

We serve all areas of Kensington including Kensington High Street, Holland Park, Kensington Palace, Earl's Court, Olympia, Notting Hill Gate, and surrounding streets. We also cover South Kensington, Knightsbridge, Chelsea, Shepherd's Bush, and Hammersmith. Prompt service throughout the W8, W11, W14, SW5, and SW7 postcodes.