— South West London workshop

A workshop, not
a showroom.

We're a South West London-based workshop specialising in custom-made window joinery — bespoke timber windows in Sash, Casement and Crittall styles, tailored to your project from concept to installation.

Get a quote See past work
A workshop, not<br/>a <em>showroom</em>.
Our workshop — every window made in-house

Custom window joinery, made in the UK.

We're a South West London-based workshop specialising in custom-made window joinery, tailored to meet all your needs for bespoke timber windows — Sash, Casement and Crittall.

Over the course of fifteen years, we've worked closely with leading architects, designers and builders to deliver award-winning projects. From concept to delivery we ensure excellence in every detail, with all our products proudly made in the UK — combining premium quality with competitive pricing.

…to a finished room in London
…to a finished room in London
— Our craft

Watch how a WNDW window is made.

From CNC-cut joints in the workshop to the finished sash in a London home — the process behind every window.
Filmed in our workshop and on-site across London.
15yr
Years of expertise
24/7
Concierge service
100%
Made in the UK
10yr
Workmanship guarantee
— What we believe

Five principles
we won't compromise.

Most of what makes a sash window last fifty years as opposed to fifteen happens out of sight — before a unit is painted and glass gets installed. These are the things we don't cut out.
  1. 01

    Repair before replace

    If a window can be honestly restored, we'll quote restoration even when it's a smaller invoice. Replacement is a last resort, not a default.

  2. 02

    One team, no middleman

    The surveyor who measures is the joiner who builds and the fitter who installs. No handoff means no scope drift.

  3. 03

    Engineered timber, never softwood

    Accoya as default, Sapele where listed-building consent demands period-correct grain. We don't use untreated pine, ever.

  4. 04

    Period-correct profiles

    Every sash horn, glazing bar and meeting rail is reproduced from the original section — not from a catalogue.

  5. 05

    Honest pricing

    Fixed quote after the survey. No day-rate creep, no surprise extras at handover.

— Why us

What sets us apart.

01
Quality

Our combination of cutting-edge CNC technology and skilled craftsmanship lets us achieve the highest standards. Timely delivery, uncompromised quality and attention to detail are at the core of everything we do.

02
Client service

We offer a 24/7 concierge service to ensure a seamless experience. Whether it's an urgent adjustment or a tailored solution on a tight schedule, we're always here to assist.

03
15 years' expertise

We work closely with leading architects, designers and builders to deliver award-winning projects — from concept to delivery, all proudly made in the UK.

04
Price

We know the value of our product and we're confident in the quality we deliver. Test us — let us quote your next project via our bespoke estimating system. Find a better price for an equivalent product and we'll beat it.

— Inside the workshop

Made by hand, in London

Every WNDW window is drawn, cut, assembled and painted by the same small team — no subcontracting.
Craftsman working at the bench
01 At the bench
Craftsman holding a bespoke window frame
02 Built by hand, sash by sash
Level and laser tools on joinery
03 Precision tools, period profiles
Hand-finishing a window on site
04 Hand-finished, not machine-sprayed
Bespoke plywood joinery unit in the workshop
05 Bespoke joinery in the workshop
The install team in hi-vis
06 The team on site
Craftsman shaping a timber sash rail on the moulder
07 Shaping a sash rail
CNC machine cutting a timber window component
08 Machined to the micron
— Trusted by

Heritage bodies &
conservation officers.

A short list of organisations and architectural practices we've worked with on protected and listed buildings.
  • The Landmark Trust
  • English Heritage
  • SPAB
  • Westminster City Council
  • RBKC Conservation
  • Camden CA Office
  • Donald Insall Associates
  • Purcell Architects
  • Caroe Architecture
  • Allies and Morrison
  • Squire & Partners
  • Foster + Partners (heritage div.)
— Visit the workshop

Drop in,
bring biscuits.

Open Monday to Friday, 8am – 5pm. We'll show you how a sash is actually made — from rough sawn board to a window that will still be closing smoothly in fifty years.

Get directions +44 20 8232 8585
Workshop 137b Molesey Avenue, West Molesey,
Surrey, KT8 2RY
Hours Mon–Fri 08:00–17:00
Sat by appointment
Email [email protected]