House Extensions and Loft Conversions in Marylebone
Suddeco designs, gets approval for and builds extensions, loft conversions and renovations across Marylebone. Designed, approved and built by one team.
Side return · indicative renderPlanned 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 Marylebone
Georgian townhouses, mansion flats and mews houses, much of it on the Portman and Howard de Walden estates. Townhouse and apartment refurbishments, mews-house renovations, kitchens, bathrooms and listed interiors.
Marylebone is largely conservation area with many listed buildings; estate landlord consent and listed building consent usually come first. 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 Marylebone
Marylebone Village, Harley Street, Portman Square and the mews.
Postcodes: W1U, W1G and NW1
Part of the borough page.
A construction company near you in Marylebone
Looking for a construction company near you in Marylebone? Suddeco designs, gets approval for and builds extensions, lofts, renovations and new builds in Marylebone — building company, general contractor and design and build firm in one team.
Marylebone FAQs
Are you a construction company near me in Marylebone?
Yes. Suddeco works across Marylebone 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 Marylebone?
Extensions, lofts, conversions, renovations and new builds in Marylebone, with the drawings and approvals.
Do you build it yourselves?
Yes. Suddeco designs, handles planning and delivers the build with its own project management.