Loft Conversions in Mayfair, W1K
Dormer, hip-to-gable and mansard loft conversions for houses in Mayfair: a bedroom and bathroom under the roof, designed and built by one team.
Covered under one contract
- Structural design and calculations
- Planning or lawful development certificate
- New staircase, dormer and roof windows
- Insulation, fire safety and building control
- En-suite designed and fitted
- Waterproofing with guarantee for basements
Loft Conversions in Mayfair.
A loft conversion adds a bedroom and bathroom without touching the garden, and in most of Mayfair it is the most cost-effective way to gain a floor. Which type suits your house depends on the roof: Victorian and Edwardian terraces usually take a rear dormer, 1930s semis with hipped roofs need a hip-to-gable conversion to make the space usable, and in conservation areas a mansard or rooflight scheme may be the only option.
We start by measuring the roof. About 2.2 metres from the top of the joists to the ridge is needed for a comfortable room; we check this at the first visit before anything is drawn. From there our architects design the layout and the stair, our engineers design the new floor and any steelwork, and our team builds it with the house occupied throughout.
Most lofts are permitted development within the 40 or 50 cubic metre allowance, with the dormer at the rear. Flats, listed buildings and streets with Article 4 directions need a planning application, and every loft needs building regulations approval for the structure, fire escape and insulation. We manage all of it.
- Area
- Mayfair, W1K · W1J
- Council
- City of Westminster
- Housing
- Georgian townhouses, mews houses, Edwardian and inter-war mansion blocks, lateral apartments
- Transport
- Bond Street, Green Park
- Loft, on site
- 8 to 12 weeks
- Headroom needed
- About 2.2 m at the ridge
- Consent
- Often permitted development for lofts
Mayfair: the houses and the planning rules.
Mayfair is Georgian London at its grandest: the Grosvenor Estate's squares and streets, five-storey townhouses on Mount Street and South Audley Street, mews behind, and later mansion blocks and apartment buildings. Most houses are Grade II listed, the whole district is a conservation area, and the Grosvenor Estate exercises its own control over many properties.
We have fitted kitchens on South Audley Street, working with ebony veneers, Corian and Miele appliances in rooms with original cornices and shutters. Projects here are logistically demanding: restricted parking, timed deliveries, concierge buildings and neighbours who expect a quiet, tidy site.
The Mayfair Conservation Area covers the whole district.
Westminster City Council
Planning and listed building consent are decided by Westminster, with Historic England consulted on the most significant houses.
Grosvenor Estate
Where the freehold is held by the Grosvenor Estate, its own consent and design guidance apply in addition to the council's.
Basements
Westminster's basement policy limits depth and extent under gardens and requires a Basement Impact Assessment.
Approvals for loft conversions in Mayfair.
Most loft conversions are permitted development within the 40 cubic metre allowance for a terrace or 50 for other houses, with the dormer at the rear. Conservation areas, flats and front dormers need a planning application, and every loft needs building regulations approval.
Planning and listed building consent are decided by Westminster, with Historic England consulted on the most significant houses.
What loft conversions in Mayfair includes.
- Structural design and calculations
- Planning or lawful development certificate
- New staircase, dormer and roof windows
- Insulation, fire safety and building control
- En-suite designed and fitted
- Waterproofing with guarantee for basements
From site visit to handover.
- 01
Site visit & consultation
We visit, listen and measure. Brief, budget and constraints understood before any advice is given.
- 02
Design & itemised quote
Our architects and engineers draw the scheme, and from that we provide a transparent, itemised quotation for your approval.
- 03
Planning & approvals
Planning applications, building control and party wall matters handled for you.
- 04
Build, managed weekly
Our own trades, sequenced by a site manager. Progress reported every week.
- 05
Handover & aftercare
Joint snagging walk-through, documentation, and a guarantee on our workmanship.
Loft Conversions in Mayfair: your questions.
Is a loft conversion in Mayfair permitted development?
Often, provided the added volume is within 40 cubic metres for a terrace or 50 for other houses and the dormer is at the rear. Flats, listed buildings and streets with Article 4 directions need an application to the City of Westminster.
How much headroom do I need for a loft conversion?
About 2.2 metres from the top of the ceiling joists to the ridge. Victorian and Edwardian roofs usually have it; 1930s hipped roofs often need a hip-to-gable conversion to make the space usable. We measure at the first visit.
Which parts of Mayfair do you cover?
All of Mayfair and W1K · W1J, including South Audley Street, Mount Street, Grosvenor Square, Curzon Street, Hill Street, Park Lane, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Our work near Mayfair.
Other services in Mayfair.
House Refurbishment in Mayfair
Read more
Flat Refurbishment in Mayfair
Read more
House Extensions in Mayfair
Read more
Structural Alterations in Mayfair
Read more
Basement Conversions in Mayfair
Read more
Kitchen Renovation in Mayfair
Read more
Bathroom Renovation in Mayfair
Read more
Bespoke Joinery & Fitted Furniture in Mayfair
Read more
Architectural & Interior Design in Mayfair
Read more
Planning Permission & Building Regulations in Mayfair
Read moreLoft Conversions across London.
Central London
All of Central LondonNorth London
All of North LondonNorth-West London
All of North-West LondonTalk to us about a loft conversion in Mayfair.
We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.