About Strom Series
Strom Series is three homes by Magnus Ström. They are fully designed and built on site, at a fixed price, in nine to twelve months. This is why they exist, what they are and how we work.
Why Strom Series exists
A house designed for a single client takes three to five years from plot to moving in. The architect draws, the engineer calculates, and electrics, plumbing, ventilation and acoustics are each designed separately before it all has to fit together. Every decision along the way can move both the schedule and the price. You get the price when the design work is done, and the final cost when the house is finished.
Houses designed for everyone have the opposite problem: they have to suit as many people as possible, and the architecture comes last.
Strom Series sits between the two. Magnus Ström has designed three homes with the same care as the houses he draws for one client at a time, and the design work is done in advance — once, by him and Ola Mattisson together. That is why we can tell you what the house costs and when it will be ready before we sign the contract.
Three homes, ready to build
Strom 01 and Strom 02 on one level, Strom 03 on two. Two to five bedrooms, 126 to 224 m² of living area. Each home is complete as it is — a kitchen from our joinery workshop, bathrooms, a fireplace, underfloor heating, lighting — and every material and system is chosen by Magnus Ström.
Whatever you add has a fixed price, and you see the total as you customise the house, before you talk to anyone. Nine months to build the single-storey homes, twelve for Strom 03, counted from approved building permit and completed groundworks.
One counterpart, one contract, one responsibility.
One contract: a fixed-price turnkey agreement under ABS 18, the Swedish standard for building a house for a private client. The construction documents are our own, and what Magnus Ström drew is what gets built. Ola Mattisson is your counterpart from the first call until you move in; coordinating architect and builder is our work. You pay as the house is built, and the last ten per cent only when an independent inspector has approved it.
The founders
Magnus Ström — Co-founder
Magnus Ström is a Swedish architect with a practice in England. He designs one house at a time for clients around the world, and Strom 01, Strom 02 and Strom 03 are his homes.
Ola Mattisson — Co-founder
Ola Mattisson is a property developer who has built architect-designed houses in some of Stockholm's most sought-after areas since 2008 — one won Nacka Municipality's architecture award, voted for by residents, another made the cover of Residence. He and Magnus Ström have worked together for ten years and built several houses together.
Ström Architects
Magnus Ström founded Ström Architects in 2010. The practice has built in the UK, Sweden, Spain, the USA and the Caribbean, and has twice won House of the Year at the British Homes Awards and twice an international Architizer Award. In 2026 the practice received an RSAW Welsh Architecture Award for Porthmadog House and House of the Year at the LOOP Design Awards for Barcelona House.
Visit Ström Architects →Magnus Ström in
We start with the plot.
Tell us about your plot, or the one you're looking for. We'll get in touch to talk about which of the homes suits it.