
City of Westminster · London
Aluminium Bi-Fold Doors in Westminster
Space is precious in Westminster, so our aluminium bi-fold doors work hardest where it counts — opening mews houses onto courtyards, connecting garden flats to their patios and dissolving the wall between roof terraces and living space across Belgravia, Marylebone and Pimlico.
- FENSA
- Which?
- CERTASS
- TrustMark
Bi-fold doors made for Westminster homes
Westminster's homes rarely have sprawling gardens, which makes a well-designed bi-fold even more valuable. Here the openings we transform are courtyards behind Belgravia mews houses, the patios and lightwells of Pimlico garden flats, and the roof terraces of Marylebone and Maida Vale mansion flats. In every case, the slim aluminium frames and expansive glass make a modest outdoor space feel like a genuine extension of the room.
Given the density of listed and conservation-area housing, we focus these installations on rear and internal elevations where change is far less sensitive. Thermally broken profiles, laminated glass and multi-point locking bring modern warmth and security to homes whose front windows must stay untouched.
Neighbourhoods & postcodes we cover

Why aluminium
Slim frames, wide spans, year-round warmth
Thermally broken aluminium is strong enough for the wide openings Westminster homes are known for, yet slim enough to keep sightlines minimal and glass maximised. Low-E double glazing, weather-rated thresholds and multi-point locking mean the doors look after comfort and security as well as light.
Bi-folds in Westminster
How Westminster homeowners use bi-fold doors
Every set is designed around the way Westminster homes are built and lived in.
Belgravia mews courtyards
Two- and three-panel bi-folds open the rear of mews houses onto private courtyards, bringing light deep into the plan.
Roof-terrace mansion flats
Slim bi-folds create a seamless link between a top-floor living room and a Marylebone or Maida Vale roof terrace.
Garden-flat patios
Pimlico and Bayswater lower-ground flats gain a bright, patio-facing kitchen or living space with a full-width set.
Maximum light
expansive glass and slim sightlines open the room to the garden
A-rated warmth
thermally broken frames and low-E glass for year-round comfort
Since 1973
family-run, FENSA-registered and fully guaranteed
Recent local work
Bi-fold projects across Westminster
A snapshot of the kind of homes we help across the borough.
Belgravia, SW1
Three-panel courtyard bi-fold to a mews house, finished in matt black
Marylebone, W1
Slim bi-fold opening a top-floor flat onto a Portland-stone roof terrace
Pimlico, SW1
Full-width set connecting a garden-flat kitchen to its rear patio
Also in Westminster
Period windows to keep warm and quiet?
Many Westminster homes sit in conservation areas or are listed. Our discreet, reversible secondary glazing cuts heat loss and noise while keeping your original windows exactly as they are.
How it works
From first call to aftercare
- 01
Free Westminster survey
A specialist surveyor visits, measures the opening and advises on configuration, threshold and structural needs.
- 02
Design
We design your bi-fold around the opening — panel count, stacking direction, finish and glazing to suit the room.
- 03
Manufacture
Every set is made to measure in thermally broken aluminium to your exact dimensions and chosen RAL colour.
- 04
Installation
Our own fitters install and adjust the doors for a smooth, secure and weathertight finish.
- 05
Aftercare
Your installation is fully guaranteed, with friendly local aftercare whenever you need it.
FAQs
Bi-fold doors in Westminster — your questions answered
More London boroughs
Bi-fold doors across London
Ready to open up your Westminster home?
Book a free, no-obligation quote today. Friendly advice, honest pricing and no pushy sales.