This guide focuses on the decisions that determine a Marylebone flat refurbishment: defining the work, checking property and consent constraints, setting an evidence-backed budget and planning the sequence. The detailed local service scope remains on the Marylebone flat refurbishment page.
Start with the local service context
For a flat in Marylebone, read the lease and identify the landlord or managing agent before agreeing alterations. Written consent or a Licence to Alter is required where the lease and proposed work call for it; do not assume the same requirements for every building. Check shared floors, walls, service routes and access conditions. Planning and listed-building requirements are separate checks with Westminster.
Do the Marylebone estates affect a flat refurbishment?
For a flat in Marylebone, read the lease and identify the landlord or managing agent before agreeing alterations. Written consent or a Licence to Alter is required where the lease and proposed work call for it; do not assume the same requirements for every building. Check shared floors, walls, service routes and access conditions. Planning and listed-building requirements are separate checks with Westminster.
Which conservation area is my Marylebone flat in?
Usually one of two. The Harley Street Conservation Area, designated in 1968 and later extended to Marylebone High Street, covers the Howard de Walden grid, while the Portman Estate Conservation Area, first designated in 1967, covers the Portman streets around Portman Square.
Define the work before comparing prices
Record the existing layout and services, then separate essential fabric and compliance work from layout changes, fitted joinery and finishes. For a leasehold flat, place freeholder, managing-agent and Licence-to-Alter requirements on the decision list before design is fixed.
Check the recorded local constraints
These cited records identify issues to verify for a Marylebone brief. They do not replace property-specific advice or a current consent check.
- The Harley Street Conservation Area - first designated in 1968 around Portland Place, Harley Street and Wimpole Street, and extended west to Marylebone High Street in 1981 - covers the Howard de Walden Estate's Marylebone grid, with medical uses of international renown in and around Harley Street and Marylebone High Street as its main shopping thoroughfare; it is bounded by the Regent Street, Mayfair, Portman Estate, Regent's Park and East Marylebone conservation areas.Source: Westminster City Council, Harley Street conservation area mini guide (May 2004)
- Estate terraces: Portman and Howard de Walden estate houses — works agreed with both Westminster and the freeholder under a clear consent strategy.Source: The Portman Estate — Licence to Alter FAQ
Use the approved budget ranges consistently
The approved flat range is based on a full two-bedroom refurbishment. Keep that basis visible when comparing it with a project-specific scope.
| Scope basis | Guide rate | Typical total | Programme |
|---|---|---|---|
| Full two-bedroom flat refurbishment | £900–£1,700/sqm | £60,000–£110,000 | 16–32 weeks |
These are planning ranges, not a quotation. The property survey, final scope, specification, access and consent requirements determine the project-specific cost and programme.
Build the brief in a practical order
- Confirm the measured area, retained rooms and every proposed structural or services change.
- Check the lease, freeholder and managing-agent requirements before committing to a layout.
- Confirm whether planning permission, listed-building consent or building-control approval applies.
- Price one written scope so exclusions, provisional sums and finish allowances can be compared.
- Plan access, deliveries, working hours and neighbour communication for the specific building.
Continue with the relevant local pages
Use the service owner for the full refurbishment scope, then check the linked planning and heritage material that applies to the property.
Own a period property in Marylebone? Our heritage restoration team in Marylebone works on buildings of this era — from conservation-area planning to sensitive structural repair.
*Published in the Hampstead Renovations Heritage Collection — exploring the architecture, history, and stories of London's most remarkable neighbourhoods.*