Sash Window Repair Hampstead | Hartwell Sash
Sash Window
Repair in
Hampstead
Period property specialists serving Hampstead, Belsize Park, Highgate and West Hampstead — repair, restoration and glazing upgrades done properly.
Scroll down to see what we doVictorian villas, Georgian terraces —
windows worth preserving
Hampstead and the surrounding NW3 postcode is one of North London's most architecturally varied and well-preserved areas. Wide streets of Victorian villas and Edwardian houses sit alongside Georgian terraces and cottages — many with original sash windows that have survived largely intact.
Around Flask Walk, Well Walk, Willow Road and the streets running up towards the Heath, original sash windows are a consistent feature — often in good structural condition but needing careful restoration after years of exposure to the elements.
Much of Hampstead sits within Conservation Areas and contains many listed buildings. Original sash windows are integral to the character of these properties — and replacement work may require consent and should be checked before proceeding.
What we do —
done properly
Every service carried out with care and precision
Draught Proofing
Cold draughts and outside noise reduced significantly — without changing the appearance of your windows. We replace staff bead and parting bead with precision brush pile seals and fit a brush seal at the meeting rail.
Sash Cord Replacement
Windows that slam shut or won't stay open — fixed properly. We replace both sash cords on both sides and rebalance both sashes as standard. One visit, done properly.
Glass Replacement
Cracked, broken or misted panes replaced carefully — preserving the original timber frame. Heritage glass available for Conservation Areas throughout Hampstead.
Timber Repair & Repainting
Rotting timber repaired, not replaced wherever possible. Hampstead's exposed position on the hill means timber windows here face more weathering than most. Paint failure, swollen frames and failing cords are common — particularly on north and west-facing elevations. We work carefully to restore rather than replace, preserving the original timber wherever possible.
Slimline Double Glazing Upgrade
Upgrade single glazing to slimline double glaze units — fitted within the existing frame, preserving the original look entirely. Better insulation, less noise, no change to the character of your property.
Full Sash Replacement
When a window is genuinely beyond saving — we supply and fit heritage timber sash windows made to match the original design of your property. Not uPVC. Timber, made properly.
"Nick replaced broken sash cords quickly and efficiently. Very tidy work — wouldn't hesitate to book again."
"Outstanding craftsmanship. You can tell this is done by someone who really cares about the work."
"Clear communication and fast work — exactly what you want. Arrived on time, left everything spotless."
Working in
Hampstead's
protected streets
Much of Hampstead sits within Conservation Areas administered by the London Borough of Camden. There are many listed buildings across Hampstead and the wider NW3 area — and any work affecting their appearance requires careful consideration.
In many cases, draught proofing, cord replacement and careful like-for-like repairs can be carried out without changing the appearance of the window. For listed buildings, flats, replacement work or properties under specific restrictions, we always recommend checking the correct consent requirements before work begins.
Free survey
in Hampstead
We visit your property, assess every window and give you an honest quote — no call-out fee, no obligation, no pressure. We aim to respond the same day.