Architects · Kensington

Architects in
Kensington

Kensington homes are worth a lot of money, which means getting the architecture right matters more than it does almost anywhere else. A good extension or basement here does not just improve your life - it adds serious value to the property. We design and build these projects properly.

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Architects Kensington - townhouse rear extension in Kensington by Rosace Studio

What We Do in Kensington

Extensions, basements and renovations for Kensington properties

The typical Kensington project starts with a Victorian or Edwardian townhouse that needs more space, more light, or both. Basement conversions are common here - many properties already have cellars that can be opened up into proper living areas. Rear extensions into gardens are another staple, especially at lower-ground level where the kitchen usually sits.

Loft conversions work well where the roof structure allows it, adding a bedroom and bathroom without changing the footprint. And full house renovations - stripping everything back and rethinking the layout from scratch - are something we do regularly on the larger Kensington townhouses.

RBKC expects high design quality, and honestly, so do the homeowners. The standard of specification in this part of London is as high as it gets. That suits us - we care about the details and we have the construction team to deliver them.

  • Rear and side extensions
  • Basement conversions
  • Loft conversions
  • Full house renovations
  • Interior design and specification
  • Planning and listed building applications

Working in RBKC

Understanding the Royal Borough

The Royal Borough of Kensington and Chelsea is one of the most architecturally scrutinised boroughs in London. Conservation areas cover almost the entire borough, and the planning team takes design quality seriously. If you submit something that feels generic or poorly considered, it will not get through.

But they do approve good design. We have found that RBKC responds well to projects that show genuine thought about materials, proportions and how the new work relates to the existing building. They want to see that you have studied the character of the street and designed something that belongs there.

We work across Kensington's distinct neighbourhoods - from the stucco terraces around South Kensington and the grand houses of Holland Park, to the colourful streets of Notting Hill, the mansion blocks of North Kensington and the mixed stock around Earl's Court. Each area has its own character and planning sensitivities, and knowing those differences matters.

As an architecture and construction studio, we manage the entire project in-house - from the initial design through planning permission and building regulations to the actual build. One team, one contract, one point of contact.

Recent Projects

Selected work in Kensington

Townhouse rear extension in Kensington
Kitchen extension in Kensington
Semi-detached kitchen extension in Kensington
View all projects

Common Questions

Architecture in Kensington - answered

Do I need planning permission for an extension in Kensington? +
RBKC is one of the most conservation-heavy boroughs in London. Most of Kensington falls within conservation areas, meaning permitted development rights are restricted and full planning permission is usually required for extensions. There is strong design scrutiny from the planning team, but extensions do get approved regularly when the approach is right. Rosace has experience working within RBKC's planning framework and knows what the borough expects.
How much does a house extension cost in Kensington? +
Kensington is a premium area with premium build costs. Expect to pay between £3,500 and £5,000 per square metre for construction. A rear extension on a typical Kensington townhouse usually costs between £150,000 and £300,000 or more, depending on size, specification and site complexity. Architectural fees are calculated separately and we provide a detailed cost estimate before any commitment.
Are basement conversions popular in Kensington? +
Very popular. Many Victorian townhouses in Kensington have existing cellars that can be converted into usable living space. RBKC has specific basement development policies that limit excavation to a single storey below the existing lowest floor and require a construction management plan to be submitted with the application. We are experienced with these requirements and manage the process from design through to construction.
Does Rosace also work in neighbouring areas? +
Yes. Alongside Kensington, we regularly work in Chelsea, Earl's Court, Shepherd's Bush, Hammersmith, Fulham and across West London. We also take projects in other London boroughs and selected locations in Surrey.

Start Your Project

Planning a project in Kensington?

Tell us about your property and what you would like to achieve. We offer a free initial consultation to discuss your brief and the planning position - no obligation.

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