Westminster · SW1 · W1
House extensions in Westminster.
Additions that read as if they were always there.
Why Ushii in Westminster
Ushii delivers extension work across Westminster (SW1 · W1) with directly employed trades. Not a broker, not a list of numbers passed to whoever is free that week. The carpenters, roofers, electricians and gas engineers on your Westminster site are on our payroll, which is why programmes hold and standards stay consistent from strip out to snagging.
Westminster projects run under some of the tightest planning, security and access constraints in London. Whether the property sits on a Belgravia crescent, a Pimlico terrace or a floor in a St James's mansion block, the delivery model is the same: directly employed teams, single point of accountability, all correspondence with the council and the freeholder handled in-house.
Prime central planning departments expect measured drawings, heritage statements and a considerate constructors approach to hours, deliveries and noise. We prepare all of it before a single tool arrives on site.
The best extensions do not announce themselves. Brick coursing lines up. Ridge heights sit down. New glazing frames the garden without stealing focus from the original house. We build extensions the way conservation officers wish everyone did.
What the work covers
House Extensions for Westminster properties.
Feasibility
Planning constraints reviewed alongside your brief before drawings begin.
Coordination
Party wall, structural engineer and building control managed on your behalf.
Craft
Traditional trades and modern envelope detailing working together.
Common questions
House extensions in Westminster, answered.
How much does a extension cost in Westminster?
Cost follows scope, access and the condition of the building rather than the postcode. After a survey in Westminster we issue a fixed, itemised price so you can see exactly what each element of the extension carries. There are no provisional sums hidden in the back pages.
Do you work on belgravia stucco townhouses in Westminster?
Regularly. Belgravia stucco townhouses, St James's mansion apartments, Pimlico Regency terraces all feature in our Westminster workload, and each one is surveyed on its own terms before we price anything.
Which areas near Westminster do you cover?
We work across Belgravia, Mayfair, Knightsbridge, Pimlico, St James's and the wider London area, with a directly employed team rather than local trades brought in for the day.
Do we need planning permission?
Many rear extensions fall under permitted development. Anything on a listed building, in a conservation area or beyond PD limits will need consent. We assess this at feasibility.
How do you match old brickwork?
We take physical samples to a handmade brick supplier and dry-lay panels for you to approve before ordering.