Sash Windows for Listed Buildings London
Traditional sash window specialists serving all London boroughs.
✓ No Call-Out Fee
✓ 5-Year Guarantee
✓ Same-Day Response
✓ Fully Insured
Working on a Listed Building requires a specialist approach — not just technically, but in terms of understanding what is and is not permitted without consent. Hartwell Sash works regularly on Listed Buildings across London, providing repairs that meet heritage requirements without compromising the building’s character.
🏛️ What Listed Building Status Means
A Listed Building is one that has been designated as being of special architectural or historic interest. Any works that affect the character of the building require Listed Building Consent from the local authority. This includes replacement windows, changes to glass type, and alterations to the external appearance.
- Grade I — exceptional interest, most strictly controlled
- Grade II* — more than special interest
- Grade II — most common, still requires consent for alterations
- Like-for-like repairs generally acceptable without consent
- Any replacement or material change requires consent
🪟 What We Can Do Without Consent
Many essential repairs do not require Listed Building Consent — they simply need to be carried out like-for-like, using appropriate materials.
- Sash cord replacement — no consent required
- Draught proofing with brush pile beads — no consent required
- Like-for-like glass replacement with matching glass type
- Timber repairs using appropriate materials
- Repainting in matching colour and finish
Why London homeowners choose Hartwell Sash
Restore First
We never recommend replacement when repair will do the job. Your original windows are always our priority.
Period Specialists
Victorian, Georgian, Edwardian — we understand Conservation Areas and Listed Buildings across London.
5-Year Guarantee
Every job is covered by a 5-year workmanship guarantee. Fully insured and fully accountable.
Free survey today
We visit your property, assess every window and give you an honest quote — no call-out fee, no obligation, no pressure. Same-day response guaranteed.