Planning Permission & Building Regulations in Mayfair, W1K
Planning applications, lawful development certificates, listed building consent, building control and party wall matters for properties in Mayfair, prepared and managed by our own team.
Covered under one contract
- Planning applications and lawful development certificates
- Listed building and conservation area consent
- Building regulations, full plans or building notice
- Structural calculations
- Party wall notices
- Licence to alter for flats
Planning Permission & Building Regulations in Mayfair.
Whether a project in Mayfair needs planning permission, and how difficult that permission is to obtain, depends on the property: whether it is in a conservation area, whether it is listed, whether it is a flat with a freeholder, and whether the council has removed permitted development rights on the street. We check all of this at the first visit and tell you the route before any drawings are made.
We then prepare and submit whatever is needed to the City of Westminster: a householder application, a lawful development certificate for permitted development, listed building consent with a heritage statement, or prior approval for a larger extension. Building regulations are handled through an approved inspector or the council's building control, and party wall notices are served where a neighbour's structure is affected.
Because our architects prepare the drawings and our team builds from them, there is no handover between designer, agent and builder. One team is responsible for getting the approval and for building what was approved.
- 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
- Householder application
- 8 weeks from validation
- Listed building consent
- 8 weeks, longer with Historic England
- Lawful development certificate
- 8 weeks
- Party wall notice
- 1 or 2 months before works
- Building control
- Inspections to completion certificate
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 planning permission and building regulations in Mayfair.
We confirm the approvals route at the site visit, prepare the drawings to the council's validation standard and manage each application through to decision, including building control inspections and party wall notices.
Planning and listed building consent are decided by Westminster, with Historic England consulted on the most significant houses.
What planning permission and building regulations in Mayfair includes.
- Planning applications and lawful development certificates
- Listed building and conservation area consent
- Building regulations, full plans or building notice
- Structural calculations
- Party wall notices
- Licence to alter for flats
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.
Planning Permission & Building Regulations in Mayfair: your questions.
Who decides planning applications in Mayfair?
The City of Westminster. Householder applications are normally decided within eight weeks of validation; listed building consent runs to the same timescale unless Historic England is consulted.
Do I need planning permission in Mayfair?
It depends on the property and the proposal. Permitted development covers many rear extensions and lofts, but not in flats, listed buildings or where Article 4 directions apply. We confirm the route 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.

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Basement Conversions in Mayfair
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Read morePlanning Permission & Building Regulations across London.
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We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.

