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RICS surveying support for party walls, licence to alter, conservation-area works & neighbour mattersWe've completed house refurbishments across Marylebone High Street, Montagu Square, Bryanston Square, Dorset Square - Georgian Townhouses, Portman Estate Terraces, Mansion Flats where listed-building consent, conservation detailing and structural sequencing need handling properly with Westminster.
Many Marylebone houses sit within the Marylebone Conservation Area, and a proportion are Grade II or Grade II* listed. Our in-house RIBA Chartered Architects handle Listed Building Consent applications with Westminster directly, specify heritage-appropriate materials (lime plaster, timber sash repair, period-correct paint schemes), and coordinate the build so protected features survive the project intact. Projects typically run 16–32 weeks depending on structural scope and approvals.
Elegant village feel with Georgian architecture, Marylebone High Street boutiques, and Regent's Park proximity. Howard de Walden Estate properties. Westminster conservation area. A full refurbishment in Marylebone typically involves stripping the property back to its structural shell, upgrading mechanical and electrical services, reconfiguring layouts, and finishing to the highest standard — all while preserving and restoring original period features.
Our Marylebone refurbishment projects are managed through a single point of contact, coordinating architects, structural engineers, M&E specialists, and specialist subcontractors. We work within Westminster's planning and building control requirements to deliver on time and on budget.
Marylebone is one of London’s most complete Georgian quarters, and refurbishing here is governed less by design ambition than by who holds the freehold. It belongs to the City of Westminster, largely inside the Marylebone Conservation Area, and its terraces sit on the Portman and Howard de Walden estates. Designated in 1967 and later extended, the Portman Estate Conservation Area protects the late-18th and early-19th-century grid that spread from Portman Square through Manchester Square to Baker Street.
That estate structure defines the consent stack. Portman and Howard de Walden houses are refurbished under a programme agreed with Westminster and the estate freeholder, so a clear consent strategy comes first. The Georgian townhouses on the great squares, the estate terraces and the substantial mansion flats are largely listed and leasehold — Montagu Square and Bryanston Square hold elegant brick runs, Dorset Square a Regency set-piece, and Marylebone High Street the mansion flats and conversions above the shops.
The borough figure the council uses runs £90,000–£475,000 net of VAT, from a lighter refurbishment near the lower bound to a full back-to-brick job at £275,000–£475,000. Freeholder approvals, mansion-flat acoustic upgrades, sash and facade decisions and party-wall coordination then shape where a particular Marylebone project lands.
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. The Portman Estate Conservation Area was first designated in 1967 to cover the late 18th and early 19th century residential area developed by the Portman Estate, and was extended in 1979 to include parts of Seymour Place and Marylebone Road and in 1990 to include Portman Square; Portman Square was laid out in 1764 and the estate's characteristic 18th century grid extended to Manchester Square (1776) and Baker Street (completed c. 1800). The Marylebone Village Area of Special Archaeological Priority lies largely within the Harley Street Conservation Area around the north end of Marylebone High Street, and the strategic view from Primrose Hill to the Palace of Westminster cuts through the conservation area from Park Crescent to Oxford Street.
Sources: Westminster City Council, Harley Street conservation area mini guide (May 2004) (2026); Westminster City Council, Portman Estate conservation area mini guide (May 2004) (2026)
A full house refurbishment takes a property back to its bones and rebuilds every layer — fabric, services and finishes — in one continuous programme. Rather than patching rooms in isolation, the whole building is brought up to a single standard, so the wiring behind a new kitchen is as sound as the cabinetry in front of it. Most projects we price cover the scope below.
Six stages, each closed out before the next begins, so decisions are made on paper rather than mid-build.
Read the full house refurbishment guide for stage-by-stage detail, specification tiers and cost anatomy.
Building Regulations touch almost every element of a refurbishment — structure, electrics, heating, ventilation and fire safety all need formal sign-off, and we manage building control from submission through to the completion certificate. Where work affects a shared wall, the Party Wall etc. Act 1996 may require notice to your neighbours before structural work begins, and conservation-area or listed status can add consent steps. Our planning guide library explains the rules borough by borough.
We are a design-and-build company, not a broker of trades. Design comes from our in-house RIBA Chartered Architects, surveying support comes through our RICS-partnered sister company, and the build is delivered by teams we use project after project. Every contract is fixed-price on JCT terms and carries £10M professional indemnity and public liability cover, a 12-month defects period and a 10-year workmanship warranty. One team, one contract, one point of accountability — from the first site visit to the day we hand back your keys. Enquire before 2pm on a weekday and we will call you back the same day.
As a guide, budget £1,200–£3,500+ per square metre depending on specification — the lower end for sound houses with straightforward layouts and mid-range finishes, the upper end for structural reconfiguration and premium materials. A typical whole-house programme runs 16–32 weeks on site, and every project is priced line by line before you commit.
Estate ownership. Many Marylebone terraces are Portman or Howard de Walden estate houses, so the works are signed off by both Westminster and the freeholder under a defined consent strategy — estate consent runs alongside the planning process, and the mansion blocks bring extra freeholder and party-wall layers.
Marylebone lies in the City of Westminster, much of it within the Marylebone Conservation Area and across the Portman and Howard de Walden estates. The Harley Street Conservation Area — first designated in 1968 around Portland Place, Harley Street and Wimpole Street, and extended west in 1981 — covers the Howard de Walden grid.
Marylebone’s stock — Georgian townhouses on the great squares, estate terraces and mansion flats — is, for the most part, both leasehold and listed. Montagu Square and Bryanston Square carry fine brick terraces on the Portman Estate, Dorset Square is a leafy Regency set-piece, and the mansion flats and conversions above Marylebone High Street complete the picture.
The Westminster published band for a house renovation reads £90,000–£475,000 exclusive of VAT; a cosmetic tier is priced £90,000–£180,000 and, at the top, a back-to-brick renovation £275,000–£475,000. We price a Marylebone scheme precisely once the estate and planning route are agreed.
Costs in Marylebone are driven by freeholder approvals, mansion-flat acoustic upgrades, conservation or listed fabric, facade and sash decisions, central W1 access and storage, party walls and service renewal.
Marylebone sits in the City of Westminster, and a full refurbishment here means working with elegant Georgian terraces and mansion blocks on the Portman and Howard de Walden estates. Whole-house and whole-flat projects restore the period fabric — brickwork or stucco, sash windows, cornicing and fireplaces — while quietly bringing services, insulation and layout up to modern standards behind the protected exterior.
Because the estate streets are tightly managed and a high proportion are listed, refurbishment here runs on conservation guidance, and Listed Building Consent where it applies, as much as on Building Regulations. We sequence the restoration, structure and services as one fixed-price contract, designed from the period detail outward.
Marylebone heritage & architecture: Conservation areas · Roof developments & conservation · Listed buildings · Renovating a period terrace · Period facades · Facade planning rules
Westminster City Council · W1
Whole-property refurbishment in Marylebone frequently involves conservation-area consent — and listed-building consent where applicable — so Westminster City Council assesses external alterations, windows and structural changes alongside Building Regulations, often with party wall agreements on terraced and semi-detached homes.
Marylebone W1 sits within Marylebone's conservation areas, and Westminster applies a demanding conservation and listed-building regime, and many mansion blocks and townhouses here are listed or sit within tightly controlled estates such as the Grosvenor, Howard de Walden and Crown estates. Much of Marylebone is managed by the Howard de Walden and Portman estates. Our in-house RIBA Chartered Architects prepare and submit every application to Westminster City Council and handle pre-application discussions where early planning advice is useful.
House Refurbishment in Marylebone must satisfy Building Regulations — covering structural alterations to Part A, fire safety to Part B, thermal upgrades to Part L, and electrical and gas certification. Our in-house engineers manage Building Control from initial notice to completion certificate.
See recent Marylebone work: Home refurbishment, Marylebone. Explore our Kitchen Renovation Loft Conversions in Marylebone, or the Marylebone hub · Refurbishment Company in Marylebone.
Our in-house planning team prepares and submits every Westminster City Council application and manages building control end to end. View our planning track record →
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We survey your property, discuss your vision and provide a clear budget framework.