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Sash window specialists covering Kent, London & the South East · We’ll beat any written quote ★ 5.0 on Google · 84 reviews Mon–Fri 9am–5pm
Advanced Sash Windows logoADVANCED SASH
WINDOWS
Sash window specialists · Maidstone
01622 470019

Sash window contractors for councils, developers and property managers

Specialist subcontract sash window repair and restoration across Kent, London and the South East — single blocks or whole portfolios.

Get a free quote Call 01622 470019
★★★★★ 5.0 from 84 Google reviews We’ll beat any like-for-like written quote Insured to £5m · 10-year draught-proofing guarantee · free survey
Large Victorian red-brick institutional building with sash windows

We work as a specialist subcontractor on social housing, listed and period property schemes, handling the sash window element of a refurbishment: survey, schedule of works, repair, draught-proofing, restoration and decoration. Insured to £5m and used to working alongside main contractors and conservation officers.

  • Local authorities & housing associations — planned maintenance and void works, including listed and conservation-area stock
  • Developers & main contractors — sash packages on conversions and refurbishments, priced per window and programmed to your dates
  • Property & block management — portfolio surveys with a window-by-window schedule of works
  • Architects, surveyors & estates — condition reports and repair-versus-replace advice for schools, offices and commercial period buildings

How we price commercial work

Send a schedule of works, a tender pack or a site address and we will come back with a priced submission. If there is no schedule yet, we will survey and produce one — a numbered list of every window with its condition, the work needed and a price against it.

Email info@sashworx.co.uk or call 01622 470019.

Frequently asked questions

Do you work as a subcontractor?

Yes. A good share of our work is subcontract: sash repair and restoration packages for main contractors, developers, councils and managing agents across Kent, London and the South East.

Can you price a whole block or portfolio?

Yes. We survey window by window and give you a schedule of works with a price against each one, so you can budget a block or phase it over several years.

Are you insured for site work?

Yes — £5m public and employers’ liability.

Can you work to our programme?

Yes. We programme around other trades and agree access and sequence before we start.

Services

Draught-proofing Sash cord replacement Rotten timber repair Sticking & painted-shut sashes Double-glazed sashes Full restoration

Areas we cover

Maidstone Tunbridge Wells Canterbury Faversham Gravesend Sevenoaks Bromley Greenwich

What we bring to site

  • CSCS-carded fitters
  • £5m public and employers’ liability insurance, certificates on request
  • 10-year guarantee on draught-proofing, 1 year on all other workmanship
  • Fixed written pricing per window, so applications and variations are easy to check
  • Advanced Sash Windows Ltd, registered in England & Wales no. 11598336, trading since 2016
Warmer, quieter windows that open properly. Free survey, fixed quote — and we’ll beat any like-for-like written quote.
Get a free quote Call 01622 470019 WhatsApp us