Residential Architecture · London · Est. 2014

Residential Architects in London
— Extensions,
New Builds & Renovations

From considered home extensions in Chelsea to landmark new builds in Hampstead — Rosace Studio designs and delivers enduring residential architecture for London's most discerning clients.

View our work About the studio
Rosace Studio — residential architects in London, contemporary home extension
Fig. 01 — Residential Architecture · London

Rosace Studio · London

Architecture that
transforms London homes.

From pre-concept feasibility to final construction handover — our in-house architects, interior designers and builders work as one team across London's finest residential projects.

About the studio

Rosace Studio is a London-based architecture and interior design practice with over a decade of experience delivering some of the capital's most considered residential work — from carefully crafted home extensions in Kensington and Chelsea to landmark new-build residences in Hampstead and Mayfair.

Our name derives from the French rosace — the rose window. Like those intricate geometric forms assembled from countless precise elements, we believe great architecture emerges through layered precision: each decision in deliberate relationship with the whole.

We work exclusively on high-end residential projects where design quality, material excellence and spatial intelligence matter. Our in-house studio — architects, interior designers and builders — ensures that ambition is matched by delivery.

Design. Create. Transform.

Our services

What we do
in London.

From planning strategy to full construction — entirely in-house, across London.

— 01

Home
Extensions

Rear, side, wraparound and double-storey extensions across London. Permitted development to full planning applications — designed to feel integral, not added.

Explore extensions →
— 02

Loft
Conversions

Dormer, hip-to-gable, mansard and rooflight conversions for London's period terraces, conservation areas and mansion blocks.

Explore conversions →
— 03

Large Residential
Projects

New builds, substantial refurbishments and bespoke residences for London's premier boroughs — from Kensington townhouses to Hampstead villas.

Explore large projects →
— 04

Planning
Permission

Expert planning strategy, drawings and full application management across London's complex borough landscape — conservation areas, listed buildings and more.

Planning services →
— 05

Interior
Design

In-house interior designers who bring a distinctive design voice to every project — from kitchen layouts and bespoke joinery to full material specification.

Interior design →
— 06

Build &
Construction

Full in-house construction capability — structural works, building regulations, site management and final finishes. One studio, one responsibility.

Construction →

Selected work

Recent London
projects.

All projects
Cobham new-build residence — residential architects London, Rosace Studio
— 001 / 2024

Kensington Residence

Ground-up new build · Kensington

Mayfair kitchen extension — London residential architecture by Rosace Studio
— 002 / 2024

Mayfair Kitchen

Kitchen extension · Mayfair

Kingston double-storey rear extension — residential architects London, Rosace Studio
— 003 / 2024

Kingston Extension

Double-storey rear · Kingston

Why choose Rosace

A London studio built
for complex residential
briefs.

01

Full in-house capability

Architects, interior designers and builders as one team — no fragmented handoffs, no diffused accountability.

02

London planning expertise

Over a decade navigating London's boroughs, conservation areas and planning authorities — from Chelsea to Hampstead.

03

High-end residential focus

We work exclusively where design quality, material intelligence and spatial precision are non-negotiable.

04

Sketch to handover

Seven distinct project stages — pre-concept through to construction completion — all delivered from one studio.

Kingston wraparound extension — London residential architecture by Rosace Studio
10+
Years of London
residential experience

How we work

Our process.

Full process
— Stage 01

Pre-concept & Feasibility

Site appraisal and planning research before any design investment is made.

— Stage 02

Concept & Schematic

Spatial concepts developed and refined in close collaboration with the client.

— Stage 03

Planning & Approval

Full application management and authority liaison across all London boroughs.

— Stage 04

Build & Completion

Tender, structure, building regulations and in-house construction to handover.

— Client testimonials —

"Rosace transformed our Victorian terrace in Chelsea beyond what we thought possible. Their understanding of planning constraints and design quality is exceptional — they guided us through every stage with complete clarity."

S.B. — ChelseaRear extension & interior design

"The planning process for our Hampstead home would have been daunting without Rosace. They knew exactly what the council would require and delivered a scheme that sailed through approval first time."

M.H. — HampsteadLoft conversion & planning

"What sets Rosace apart is the in-house build capability. We had one point of contact from first sketch to final handover — the quality and coherence of the finished project reflects that seamlessly."

J.K. — KensingtonFull new build residential

"Our Mayfair townhouse renovation required a studio that understood conservation areas deeply and had the design language to match the brief. Rosace delivered on both counts — with remarkable attention to every detail."

A.R. — MayfairTownhouse refurbishment

Have a London project
in mind? Let's talk.

Start an enquiry View projects

Explore our services

Architecture & design
across London.

Whether you're planning a home extension in Chelsea, a loft conversion in Hampstead, or a landmark new build in Kensington — Rosace Studio has the expertise, planning knowledge and in-house delivery capability to make it happen.

Explore our service and location pages for detailed guidance on planning, permitted development, building regulations and architectural approach across London.

Home Extension Architects LondonExtensions
Loft Conversion Architects LondonConversions
Large Residential Architects LondonNew builds
Planning Permission Architects LondonPlanning
Architects in ChelseaLocation
Luxury Architects LondonPremium
New Build — Surrey & CobhamSurrey
Townhouse Extension — MayfairMayfair

— Where we work — London & the UK

Our studio works across all London boroughs and on selected residential projects throughout the UK.

Kensington & Chelsea Westminster Camden Hampstead Mayfair Belgravia Wandsworth Hammersmith & Fulham Kingston upon Thames Marylebone Islington Fulham Notting Hill Holland Park Primrose Hill Clapham Richmond Wimbledon Putney Battersea Greenwich Hackney Surrey — Cobham & Esher Surrey Hills Berkshire Hertfordshire Oxfordshire Cotswolds