Hampstead Architecture and Planning

Kensington & Chelsea

House Refurbishment Architects in Kensington

A whole-house refurbishment lets you rethink how a Kensington home works from the front door up, rather than redecorating its existing compromises. We reorganise layout, light and circulation, renew structure, services and fabric, and coordinate the RBKC consents so townhouses, mansion flats and period terraces are delivered as one project.

Last updated

Practice leadership

Eyal Moran, Director and Lead Architect, is an ARB-registered architect, leading design judgement, planning strategy and technical coordination across client projects.

Verify on the Architects Register

The short answer

Who does house refurbishments in Kensington?

We are residential architects who design whole-house refurbishments for Kensington townhouses, mansion flats and period terraces. We reconfigure layout and circulation, renew structure and services, sensitively upgrade period and listed fabric, and coordinate the RBKC planning, conservation and listing consents — delivering the work as one coordinated contract rather than piecemeal jobs.

Planning at a glance

Kensington

Planning at a glance in Kensington
Local planning authorityRoyal Borough of Kensington and Chelsea
Conservation areaKensington Conservation Area — appraisal adopted 3 February 2017
Likely approval routeHouseholder planning application or permitted development, depending on conservation status, listing and property type — confirmed for the exact address before drawings begin
Statutory determination time8 weeks for most householder applications (13 weeks for major applications)
Typical drawing package£395–£4,950 inc. VAT, fixed fee. Find my package →

The value in refurbishing a Kensington house rarely lies in the rooms you can already see; it lies in how you move between them. Tall stucco townhouses stack living space over four, five or six storeys, and the original plan often traps daylight in the middle and leaves the lower ground dark and cut off. We start from how you actually want to live, then test what the structure and party walls allow — relocating stairs, opening the plan toward the garden, and drawing light down through the section so the whole house reads as one connected home rather than a stack of separate floors.

The single most important decision on a project this size is to treat it as one thing. A genuine whole-house scheme usually combines reconfiguration with new structure, a complete services renewal, fabric upgrades and, frequently, an extension or lower-ground works — and running those as separate trades invites clashes, abortive work and a budget that drifts. Designed and tendered as a single package, the structural, mechanical and architectural information lines up, one contractor prices a complete scope against the same drawings, and the disruption happens once rather than in repeated waves.

Period Kensington houses reward refurbishment but seldom reveal their condition until work begins. Behind handsome stucco and lath-and-plaster we regularly find tired or undersized structure, damp and timber decay, perished wiring, end-of-life heating and plumbing, asbestos in properties of certain eras, and earlier alterations that were never quite right. We commission the surveys and opening-up that expose these issues before the design is fixed and the contract is priced, so the budget reflects the real fabric of the building rather than an optimistic assumption about what the walls are hiding.

A full refurbishment is a once-in-a-generation opportunity to fix everything that is invisible but decides how a house feels and runs. With floors up and walls open, we renew wiring, heating and plumbing as one coherent system, improve insulation and airtightness within what a period and often conservation-area fabric will tolerate, design proper ventilation, and where sensible make the house ready for a future heat pump — all coordinated with Approved Document L. Doing this while the building is already open is far cheaper and less disruptive than returning to any of it later.

How a whole-house project is run matters as much as how it is designed. These schemes are too disruptive and too structurally involved to live through comfortably, so we help you weigh moving out against a phased occupation, and we plan the sequence — services strip-out, structure, first fix, finishes — so trades follow one another cleanly. We prepare a proper tender package so contractors price the same defined scope, and on work of this scale we would normally recommend a formal building contract with contract administration, so cost, changes and quality are managed against agreed terms.

Kensington sits within the Royal Borough of Kensington and Chelsea, an authority known for rigorous planning and conservation policy and for detailed basement controls. Internal reconfiguration of an unlisted house often falls outside planning control, but much of Kensington lies within conservation areas and a great many buildings are listed — and where a house is listed, internal alterations as well as external change can require listed building consent. We confirm the planning, conservation and listing position for the specific address and design the refurbishment to those standards, while being candid that no consent can be guaranteed.

Local analysis

What matters in Kensington

Kensington house refurbishments: pin triage

For house refurbishments on a Kensington pin, start with building type (Grand stucco townhouses vs Mansion flats in period blocks), ownership and Kensington & Chelsea records — not a catalogue layout.

Kensington falls within the Royal Borough of Kensington and Chelsea, which applies notably rigorous planning and conservation policy and detailed, well-developed basement controls. Internal reconfiguration of an unlisted house often falls outside planning control, but external alterations and extensions do not, and householder applications carry a statutory eight-week determination target that a listed or basement scheme will usually exceed once the wider consents are added.

Kensington planning-data: LPA Royal Borough of Kensington and Chelsea; Kensington Conservation Area (3 February 2017). RBKC has a specifically named "Kensington Conservation Area" whose appraisal was adopted 3 February 2017 — this is the single most characteristic CA for the Kensington neighbourhood and is named here on that basis. However, the wider Kensington area is covered by several distinct conservation areas (e.g.

Kensington house refurbishments: drawing and evidence order

A useful Kensington package for Whole-house internal reconfiguration and re-planned circulation freezes measured existing drawings before proposed depth, then tests neighbour amenity in section against the real host.

Where freeholder or estate consent sits beside Kensington & Chelsea planning on Kensington multi-unit buildings, one measured model should serve both tracks so elevations and method notes do not diverge.

Sequence designations → route → survey → consent drawings → building regulations for Kensington.

Kensington house refurbishments: what delays this page’s projects

On Kensington jobs, late surprises usually come from wrong authority assumptions under Kensington & Chelsea, missing freeholder packs, incomplete elevations, or technical constraints (structure, fire, drainage, acoustics) discovered after the layout freezes.

We change the package when a Kensington check fails — different consent, more evidence, or a smaller brief — rather than forcing the first sketch through validation.

Kensington house refurbishments: delivery after principle

After planning principle or freeholder principle is clear on the Kensington pin, building regulations drawings and tender notes turn the approved envelope into construction information for building control and pricing.

Contractors pricing Kensington house refurbishments need consistent structure, fire, insulation and drainage notes; missing interfaces are how tender exclusions appear.

Renewing services through a five-storey townhouse

Replacing mechanical and electrical services across a tall Kensington townhouse is a vertical problem before it is a room-by-room one. Plant location, riser routes, soil and waste stacks, hot-water distribution to bathrooms on every floor and the position of the consumer unit all have to be resolved as a whole before finishes are chosen, because a riser decided late forces boxing-out, dropped ceilings or chases through fabric you wanted to keep.

We set the services strategy for the full section early — lower ground to attic — so the reconfigured plan and the engineering agree with each other rather than competing for the same wall. In a listed house that discipline also protects historic joinery and cornices from being sacrificed to a route that could have been planned around them.

Folding a basement or extension into the whole-house contract

Many Kensington whole-house projects also want more space, and RBKC's basement policy limits the depth and extent of below-ground development and requires supporting reports, so lower-ground feasibility has to be tested against that policy from the outset rather than assumed. Where a basement, lower-ground remodel or rear extension is part of the brief, we design it as an integral part of the refurbishment.

That means one structural scheme, one waterproofing and drainage strategy and one contractor, so the below-ground works and the house above are detailed together and the party wall processes with closely-set neighbours are handled in a single programme rather than as an afterthought once the main works are underway.

Whole-flat refurbishment in a Kensington mansion block

Refurbishing an entire mansion flat is as much a consent-and-coordination exercise as a design one. The freeholder or managing agent usually controls alterations through a Licence to Alter, and moving bathrooms and kitchens, forming structural openings, upgrading acoustic floors and maintaining fire separation between flats all sit alongside the building's own rules.

We produce the drawings and evidence that support the Licence to Alter and satisfy building control, and coordinate the acoustic, structural and fire input the block will expect, so a full flat refurbishment is approved and buildable rather than stalled part-way by a technical requirement raised late.

Thinking about a project in Kensington?

Send the address and a short description. We will confirm the likely approval route and the drawings your project needs.

Local planning

Planning & conservation context

Kensington falls within the Royal Borough of Kensington and Chelsea, which applies notably rigorous planning and conservation policy and detailed, well-developed basement controls. Internal reconfiguration of an unlisted house often falls outside planning control, but external alterations and extensions do not, and householder applications carry a statutory eight-week determination target that a listed or basement scheme will usually exceed once the wider consents are added.

Much of Kensington lies within conservation areas, where the acceptable extent of external change is judged against the area's character and RBKC's conservation-area appraisals. Where a whole-house scheme includes a lower-ground or basement element, the borough's basement policy limits its depth and extent and requires supporting reports, so that feasibility must be established against policy before the design is fixed.

Party wall procedures under the Party Wall etc. Act 1996 commonly apply where structure is altered close to Kensington's shared walls and boundaries, and they run in parallel with planning and building regulations rather than replacing them. We map the likely consent and notice routes for the specific address so the programme reflects them from the outset.

Kensington's stucco townhouses, garden squares and period terraces are closely protected, and RBKC holds high expectations of design quality, so external alterations forming part of a refurbishment are designed and evidenced with conservation policy in mind.

Even where change is largely internal, work visible from the street — windows, front doors, railings and roofscape — is assessed against the conservation-area character, so those elements are handled carefully within the wider scheme.

Listing is common across Kensington, and for a listed building internal alterations as well as external change can require listed building consent. Listing must be confirmed per address, and we establish it before any refurbishment design commits to removing, moving or altering historic fabric.

Consent for internal reconfiguration of a listed house turns on the significance of what is affected, so a heritage-led approach to plan changes, joinery and services routes is usually needed rather than a purely spatial one.

For the wider local-authority picture — policies, timescales and application routes — see planning in Kensington & Chelsea.

Illustrative study — street elevation

Architecture in Kensington: FAQs

Does a whole-house refurbishment in Kensington need planning permission?

Internal reconfiguration of an unlisted Kensington house often falls outside planning control, but external alterations, extensions and any work to a listed building or affecting conservation-area character can require consent. Because much of Kensington is a conservation area and listing is common, we confirm the position for your specific address before the design is fixed.

Do I need listed building consent for internal work?

If your Kensington house is listed, yes — internal alterations such as moving walls, replacing joinery or altering historic fabric can require listed building consent, not just external changes. Listing must be confirmed per address, and we check it before any design commits to removing or altering original features.

Should I move out or live through the refurbishment?

A true whole-house refurbishment is usually too disruptive and structurally involved to live through comfortably. We help you weigh moving out against a phased occupation, and where you stay we sequence the works and isolate zones — though on Kensington townhouses a full decant is often the more practical and faster route.

Can you combine an extension or basement with the refurbishment?

Yes, and it is usually more efficient to design and build them together as one coordinated project. In Kensington, any basement is subject to RBKC's specific basement policy, which limits depth and extent and requires supporting reports, so we test lower-ground feasibility against that policy from the start.

How much does house refurbishments in Kensington cost?

Architect fees depend on the scope, the property and the consent route — a listed townhouse with a basement differs greatly from an unlisted flat. Our published packages start from a fixed fee confirmed once the scope is clear, excluding council application and consultant fees. We set out exactly what is included before you commit.

How long does a whole-house refurbishment take?

Design, approvals and construction typically run across many months, and a listed or basement-involved Kensington scheme takes longer because of consent timescales and technical coordination. Householder applications carry a statutory eight-week determination target, but listed building consent, party wall procedures and tendering all add time we programme from the outset.

Can you renew the wiring, heating and plumbing at the same time?

Yes — a full refurbishment is the ideal moment. With floors up and walls open we renew the electrics, heating and plumbing as one coordinated system, improve insulation and ventilation within what the fabric allows, and coordinate everything with building regulations, which is far cheaper than returning to services work later.

Do I need freeholder consent to refurbish a mansion flat?

Almost always. Kensington mansion flats are typically leasehold, and the freeholder or managing agent controls alterations through a Licence to Alter. We prepare the drawings and technical evidence that support that consent alongside building control, and coordinate the acoustic, fire and structural requirements the block will expect.

Will I need a party wall agreement?

Probably, if the works affect a shared wall or structure near a boundary, which is common in Kensington's closely-set terraces and mansion blocks. The Party Wall etc. Act 1996 process runs alongside planning and building control, and we flag the likely notices early so surveyor appointments do not delay the start on site.

Do you produce drawings my builder can price and build from?

Yes. We prepare building regulations and tender drawings so contractors price the same defined scope consistently and build from clear information. For a whole-house project this coordinated package is what keeps cost and quality controlled rather than left to interpretation on site.

Plan your Kensington house refurbishment

Tell us about your Kensington house or flat and how you want it to work. We will advise on the RBKC planning, conservation and listing position, the surveys worth commissioning early, and how to coordinate the refurbishment as one project — then confirm a fixed fee once the scope is clear.

Call 020 8054 8756Send Details