
Westminster · Prime residential
Luxury construction & refurbishment in Westminster.
Refurbishment and fit-out across Westminster's garden squares, mansion blocks and Whitehall-adjacent addresses.
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Delivering in Westminster
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.
Ushii is a London construction house working with private clients, family offices and developers across Westminster and the surrounding prime postcodes. Every project is delivered by our own directly employed teams under a single point of accountability from first survey to final handover.
Properties we work on
What we build in Westminster.
Where our teams focus
Westminster disciplines.
Whole-house refurbishment
Structure, services, joinery and finish across Grade II listed and locally listed properties, cleared through Westminster City Council.
Mansion apartment fit-out
Lateral fit-out in St James's, Victoria and Pimlico blocks, delivered under freeholder consents and porter-managed access.
Security-sensitive works
Vetted crews, controlled site records and coordinated access for properties with private or public-figure security requirements.
Listed and conservation work
Correct materials, correct detailing and a conservation officer relationship that gets consents moved on time.

Services available in Westminster
Every discipline, under one team.
Answers
What Westminster clients ask.

Do you work on properties with active security requirements?
Yes. We DBS-check the site team, keep a controlled site manifest, brief the security detail before mobilisation and reduce the number of trades on site at any one time when needed.
How do you handle Westminster City Council planning?
Our project managers deal with the council directly, submit clean applications and respond to conservation officer queries within days rather than weeks.
Do you deliver in St James's mansion blocks?
Regularly. Freeholder consents, lift bookings, protection of common parts and neighbour communication are handled by us, not the client.
Do I need planning permission for an extension in Westminster?
Westminster applies strict noise and working-hours conditions, and a construction management plan is usually required before work starts on anything substantial. We confirm the position for your specific address before any design work begins, including whether the property sits inside a conservation area or carries an Article 4 direction.
Which council covers Westminster?
Westminster is covered by Westminster City Council. Over three quarters of the borough is conservation area, and the areas around St James's, Pimlico and Marylebone carry some of the tightest controls in London.
How long does a project in Westminster usually take?
Four to nine months for an apartment, eight to fourteen for a whole house.
What kind of properties do you work on in Westminster?
Georgian terraces, purpose-built mansion blocks, stucco squares and mixed-use buildings with commercial ground floors. Our Westminster work is mainly refurbishment of period houses and apartments, structural alterations, roof and parapet repair, and commercial to residential conversions.
Do you use subcontractors on Westminster projects?
No. Every trade on site is directly employed by Ushii, so the people who price your Westminster project are the people who build it.
Services in Westminster
Explore a specific trade in Westminster.
Local guide
Building in Westminster: renovation, planning and getting it right
Housing stock, council planning policy, realistic programmes and the site logistics behind a Westminster project.
Read the guide →
Also delivering in