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"Granit is an award-winning, design-led, London architecture studio and interior design practice."


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Our location

Studios 18-19
16 Porteus Place

Locations we cover





Kensington and Chelsea


City of London



West Sussex


East Sussex



Opening hours

Mon 9:30am - 6:00pm

Tue 9:30am - 6:00pm

Wed 9:30am - 6:00pm

Thu 9:30am - 6:00pm

Fri 9:30am - 6:00pm

Sat Closed

Sun Closed

Our story

We are a team of design-led architects and interior designers that believe in the value of great design and how it positively impacts our lives, communities and the broader environment. We aim to deliver great design and achieve high levels of customer satisfaction, and our Net Promoter Score suggests we are achieving both. Read on to find out more:

We are Creative Architectural and Interior Designers

We pride ourselves on creative thinking and provide a unique design solution for every architectural and interior design project. Our creative vision, experience built up over 30+ years, and the relationships we have established help us to navigate the complexities of construction. We manage the details so you can stay focused on your goal of a beautiful home.

We are inspired by contextuality, people, natural light and the use of materials. We believe buildings should be beautiful, functional and sustainable.

We are Joined up Thinkers

We take a holistic approach to designing buildings, encompassing architecture, interior design, planning consents, legislation compliance and the detail to deliver coordinated construction information for every project. This management of the whole process is reinforced by our commitment to BIM and sustainable design. We believe in setting out to build what we design from the outset, so our designs are rooted in reality.

We are a Partner for the Journey

We are a RIBA Chartered Practice with the people, resources, experience and office systems in place to deliver construction projects in a professional manner. We add value at all stages of the renovation process, working closely and collaboratively with our clients and professional partners, forging long-term relationships. We never lose sight of the practical, budgetary or commercial motivations behind a project.

We have a People-First Approach

We are a team of bright, passionate individuals – ambitious, creative and determined - with the right balance of energy and experience.

Architects & Designers Project range: £100,000 - £5,000,000


Planning Application

Technical Drawings

Design Drawings


New Build

Basement Conversions

Internal Renovations

Loft Conversions



Project: Contemporary Family Home



This project is a radical transformation of a tired, detached property from three flats into a modern, beautiful family home. Our client was keen to balance contemporary design whilst maintaining as much of the character of the original house.
Maximising natural light, space and establishing a visual and physical connection were also key drivers for the design.


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Project: Award-Winning New Build House


St John's Wood, London

Previously a tired semi-detached house in a conservation area St Johns Wood, this project was about reconfiguring, extending, adding a basement and a garden room to suit multiple generations of our client's family.

This project won an International Design and Architecture Award, 2017.


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Project: Apartment Modernistion


Clapham, London

Our clients own an apartment in a mansion block overlooking Clapham Common. They wanted to modernise and bring the apartment up to date, including changing the existing small cellular spaces to create a new open-plan room, extending into the loft and creating a new master bedroom suite, and finally creating a roof terrace for some much-needed private outdoor space.


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Project: Modern Addition to a Grade II Listed Home



This previously neglected Grade II listed building – a Georgian semi-detached cottage – on the end of an eclectic terrace in an East Sussex market town has been updated to create a stunning long term home. We replaced a hitch potch of previous extensions with a modern twist and reorganised the internal layout to create a home perfect for our clients.


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Project: Family House Extension



We helped our clients to extend and refurbish this five-bedroom Victorian property in Wimbledon. It now perfectly fits the needs of their family.


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