House Extensions and Loft Conversions in Mayfair
Suddeco designs, gets approval for and builds extensions, loft conversions and renovations across Mayfair. Designed, approved and built by one team.
Side return · indicative renderWhat gets approved in Mayfair
Real planning decisions near you, from council records.
We check Mayfair decisions from your exact address
Public planning records vary by council: for Mayfair we do not hold a district-level summary yet, so we run the check against your own address instead — it uses the same council records.
Planned around the house you have
Layouts shaped by the plot
Choose a layout that suits the plot, the structure and how you live.
Old and new join properly
Drainage, utilities and structural openings planned before they become snags.
Access kept in view
Residents, deliveries and trades all need a workable route through the site.
Start from a layout
What we build here
Nearby boroughs
What to know before building in Mayfair
Georgian and later townhouses, mansion flats and mews houses, much of it on the Grosvenor estate. Full townhouse and apartment refurbishments, mews-house renovations, listed interiors, kitchens and bathrooms.
Mayfair is a conservation area with many listed buildings; estate landlord consent and listed building consent usually come before any design is fixed. We check your exact address with Westminster City Council records before we draw anything, and price the whole job — design, approvals and build — in one estimate.
Where we work in Mayfair
Grosvenor Square, Mount Street, Berkeley Square, Shepherd Market and the mews behind them.
Postcodes: W1J, W1K and W1S
Part of Westminster.
A construction company near you in Mayfair
Looking for a construction company near you in Mayfair? Suddeco designs, gets approval for and builds extensions, lofts, renovations and new builds in Mayfair — building company, general contractor and design and build firm in one team.
Mayfair FAQs
Are you a construction company near me in Mayfair?
Yes. Suddeco works across Mayfair and every other London borough. We survey the site, draw and approve the design, and build it with our own team. Call 020 3633 8086 or book a free survey.
What construction work do you do in Mayfair?
Extensions, lofts, conversions, renovations and new builds in Mayfair, with the drawings and approvals.
What should we send for a Mayfair extension or loft?
Plans or photos, the property address, notes on access and anything awkward such as drainage or shared walls. Or start with just your address and we draw the existing house.
Is my street in a conservation area?
We check it when you enter your address, alongside permitted development and nearby decisions.
Do you build it yourselves?
Yes. Suddeco designs, handles planning and delivers the build with its own project management.