In Hampstead, period homes are defined by their original sash windows—but when they start sticking, letting in draughts or showing signs of rot, the problem goes beyond comfort. It becomes a question of cost, compliance and preserving your property’s character. At Hampstead Sash Window Repairs, we help homeowners make the right call—restoring what matters, improving performance and avoiding costly mistakes in conservation areas.
Hampstead and nearby areas (NW3, NW6, N6, NW11) fall under Conservation Area protection. This means you cannot freely replace sash windows without considering heritage regulations.
Planning officers treat original sash windows as part of a building’s character, especially on visible elevations.
In 2025, repairing sash windows is more cost-effective than replacement. Data from the Energy Saving Trust supports upgrading existing windows rather than replacing them.
Typical work includes:
Costs:
Repairs can be 40–60% cheaper than replacement, while full replacement in conservation areas can reach £10,000–£25,000+ per property due to compliance and bespoke work.
Old sash windows often cause heat loss, leading to higher energy bills.
However, full replacement isn’t the only solution.
Specialist upgrades can:
Options include:
With the right approach, you can improve performance without risking planning issues.
Poor decisions or unqualified work can lead to serious consequences:
Non-compliant replacements—especially uPVC—can result in costly reversals and long-term damage to property value.
Phone : 07351 774 880
Email:info@hampsteadsashwindowrepairs.co.uk
Address:15 Bigwood Court, Bigwood Road, London NW11 6SS
How much does sash window repair cost in Hampstead?
Typically £150–£800 per window, depending on damage, materials and level of restoration.
Do I need planning permission for repairs?
Usually not for repairs. Yes if you change design, materials or appearance.
How long does restoration take?
Around 1–3 days per window, depending on condition.
Can I draught-proof sash windows without changing their look?
Yes. Modern systems improve insulation while preserving original appearance.
What happens if I ignore repairs?
You risk rot, higher bills, security issues and possible legal complications.
Can old sash windows be energy efficient?
Yes. Slimline glazing and secondary systems significantly improve efficiency.
We recommend ‘Hampstead Glass & Glazing’ at 45 Hampstead High St, NW3.
Yes! We secure properties with professional boarding-up solutions
Yes! We work with insurers to assist with claims.