Architects of the possible

Every site has a problem. We think that’s where the interesting work begins.

Platform 5 is an award-winning architecture practice in London, designing sustainable homes, housing and mixed-use developments for private clients and developers looking to unlock the full potential of a challenging site.

We unlock hidden potential.

Difficult sites often lead to the most interesting architecture. Flood risk. Tight access. Listed neighbours. Planning constraints. Complex briefs.

We combine imagination, technical rigour and a deep understanding of planning and construction to turn constraints into opportunities. We have a strong track record of securing planning permission on difficult and sensitive sites.

A cozy indoor dining area with a large wooden table surrounded by chairs, visible through an open glass door from a small outdoor patio with brick and concrete walls, lush greenery, and wooden benches.

We design around people.

Good architecture should feel effortless to live in. It should bring in light, frame views, create calm and make everyday life feel better.

Whether we’re designing a bespoke home or a multi-home development, our work begins with how people live now and how they want to live in the future.

Two people riding bicycles past a brick building with an archway and large windows, on a sunny day with clear blue sky.

We make complexity feel clear.

Architecture involves thousands of decisions.

We guide clients through the process with clarity and confidence, using workshops, drawings, models, visualisations and virtual reality to make ideas easier to understand before they are built.

A detailed architectural model of a multi-level house showing interior layouts, with the lower level in a hot tub design, the middle level with rooms and open spaces, and the upper level as a rooftop with a pool, all on a wooden base with trees.
“Their combination of design talent, genuine care, and sheer persistence when things got difficult is rare. We couldn’t have got here without them.”
— Jonathan, Client for Hennerton Backwater

Toynbee Hall

Retained façades and a tight urban grain, this scheme of 63 homes and a new civic building that funds the charity's work on its own site.

Backwater

A multi award-winning holiday home on the Norfolk Broads, raised on piles above the flood level.

The Highway

25 homes and commercial space, bridging a Victorian sewer to unlock a plot that’s laid vacant for decades.

NW10

A triangular plot with a history of refusals turned into a sculptural North London home.

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Keep what's good. Add what's missing. At Book Tower House in Hampstead, the owners wanted to keep the Arts and Crafts details they'd inherited, not paper over them. So the contemporary work sits alongside, clearly of its own time. To the rear, a si
Would you want to sink into a bath here? At @backwater_norfolk on the Norfolk Broads, a large window sits right at the end of the tub, framing the reeds and water beyond. A tranquil view out into the Broads, and the sense of bathing almost in the la
Some houses need to be understood before they can be transformed. At Dynevor Road, a tired Victorian terrace has been reworked from front to back. Original bay windows restored, external solid brick walls lined with insulating lime plaster. A darken

Let’s talk about your project

Bring us the unusual brief. The awkward site. The project that needs a different way of thinking. That’s where possibility starts.

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