AI Startup Build Raises $8.5M for Agentic Real Estate

Jan de Vries · 2026-06-30

A British-American AI company called Build just raised $8.5 million in Seed funding. They help governments, developers, and investors speed up critical infrastructure projects. The money will go toward expanding their engineering teams, boosting R&D, and growing their footprint in North America and Europe. Index Ventures led the round. Other investors included Pebblebed, Puzzle Ventures, and Tiny.vc. A bunch of big-name angels also joined in, like OpenAI's CFO Sarah Friar and Blackstone's CTO John Stecher. That's a pretty strong vote of confidence from some serious players. ### What Build Actually Does Build's platform automates complex infrastructure workflows. Think site sourcing, technical due diligence, power assessment, and early design. They claim it helps customers cut project timelines by more than 95%. That's not a typo - ninety-five percent. The system pulls data from over 1,600 sources. It's already been used on more than 100 projects across 15 countries. Clients include governments, Fortune 500 companies, and big real estate groups like Tishman Speyer. Instead of evaluating things one at a time, Build looks at planning, environmental, power, and political constraints all at once. That parallel approach helps teams spot risks earlier and focus on the best opportunities. ### The Team Behind It Build was founded in 2024 by James Stirrat-Ellis and Ben McClusky. James is an architect who worked on projects like Singapore's Changi Airport T5. Ben is an AI researcher. They saw how slow, fragmented workflows were delaying critical projects by weeks or months. James, the CEO, puts it this way: "The industries shaping the physical world have spent decades trapped in process instead of creativity. By removing that operational burden, we can help teams move faster, make better decisions and deliver better infrastructure." ### Why This Matters Now Demand for AI infrastructure, power, and industrial capacity is growing faster than supply. That's putting pressure on governments and developers everywhere. But here's the problem - many consulting and engineering firms don't have the profit margins to invest heavily in AI. Martin Mignot, a partner at Index Ventures, explains: "Build represents a new generation of AI companies focused on delivering actual work rather than simply improving software workflows. James and Ben have combined deep technical capability with real operational understanding of how critical infrastructure gets built." ### The Bigger Funding Picture Build's round is part of a bigger trend in 2026. EU-Startups has tracked lots of investment into AI tools for real estate, construction, infrastructure inspection, and industrial engineering. Here are some comparable rounds: - Scope (London) raised $19.8 million for industrial inspection workflows - Orbital (London) raised $57.5 million for AI-powered real estate law - Qflow (London) raised $2.6 million for construction data integration - Davis (Paris) raised $5.3 million for automated architectural generation - GoCanopy (Paris) raised $2.4 million for institutional real estate investors - ScyAI (Zurich) raised $2.3 million for real estate risk intelligence - Conmeet (Germany) raised $1.5 million for construction workflows - SPREAD AI (Berlin) raised $28.7 million for industrial engineering intelligence All these rounds together add up to about $120.2 million in adjacent funding. Throw in Build's $8.5 million and you're looking at roughly $128.7 million. UK companies are especially prominent in this space, with Scope, Orbital, and Qflow all based in London. ### What's Next for Build Build combines AI talent with domain experts who actually understand infrastructure. That mix seems to be working. They've already got customers in 15 countries and are scaling fast. With this new funding, they're planning to deepen their presence in North America and Europe while continuing to build out their technology. The infrastructure challenge is global, and Build is positioning itself as a key player in solving it. They're not just tweaking existing workflows - they're rethinking how critical projects get done from the ground up. And with investors like Index Ventures and angels from OpenAI and Blackstone backing them, they've got the resources to make a real impact.