Street Group Hits £200m Valuation as Hg Bets on AI-Native Lettings Stack

A Clean Bet on Vertical AI

Street Group secured a strategic growth investment from Hg, the leading investor in European and transatlantic software and services businesses, valuing the company at more than £200m. The announcement, dated 22 July 2026, was accompanied by a regulatory notice from HgCapital Trust confirming the mechanics: London-based Hg is investing £7m, with some of its institutional clients also participating in the raise through its Hg Mercury Fund. The founders are not cashing out. The founder siblings remain majority controlling shareholders in Street Group and will continue to lead the business.

Founded and led by siblings and co-CEOs Tom and Heather Staff, and headquartered in Manchester, Street has built an integrated operating system for estate and letting agents. That operating system spans its core CRM (Street.co.uk), its prospecting and lead-generation platform, Spectre, and a growing suite of AI-native products including Cortex, which allows customers to build and orchestrate their own AI agents. Street Group serves more than 4,000 estate agency offices across the UK.

What Cortex Actually Does

The Hg rationale hinges on Cortex, Street's most recent product layer. Cortex is positioned as an AI layer built on top of Street's existing CRM and marketing system, designed for estate agents, letting agents and property managers to configure and deploy AI agents across day-to-day workflows, handling enquiry responses, client communications, marketing activity, sales progression and elements of property management. The product crosses the line from assistant to executor: Street's Cortex platform completes tasks autonomously rather than assisting with them, according to co-founder Tom Staff.

With a basic cost of £149 a month, Street plans to add extra pricing tiers as the product is released. That kind of seat-based SaaS economics, layered on top of a CRM already embedded in 4,000 offices, is precisely what Hg-style software investors price for: recurring, sticky, upsell-friendly revenue attached to a mission-critical workflow. Early uptake was notable: over 300 estate agencies were onboarding the platform within weeks of launch.

Formation Data Tells a Harder Story

The deal is a genuine bright spot against a backdrop that looks more subdued at the population level. According to AI Business Dispatch analysis of Companies House data, only 3,546 new SIC 68.20 (letting and managing of own real estate) companies were incorporated in 2026-Q3, a decline of 76.2% versus the prior period. That is a sharp contraction in the formation cohort that typically seeds demand for lettings software.

On the branding side, UK IPO trademark filings in Class 37 (building and property services) totalled just 506 in 2026-Q3, down 71.1% period-on-period, per AI Business Dispatch analysis of IPO data. Across the active SIC 68.20 universe, 99.6% of companies hold no Class 37 trademark at all. A sector where new entrant flow is thinning and brand investment among smaller operators remains minimal. Street Group sits at the opposite end of that distribution: vertically integrated, IP-backed, and now institutionally capitalised.

Compliance as a Tailwind

The broader operating environment for lettings agents is genuinely difficult, and that is part of the investment thesis. AI adoption is being driven by three forces: the Renters' Rights Act 2025 increasing compliance complexity, chronic staffing shortages in the lettings sector, and tenant expectations for instant digital communication. The Alto 2026 Agency Trends Report highlights a widening gap between larger firms and independents, with nearly nine in ten larger agencies planning to adopt AI in 2026, while smaller firms risk falling behind unless take-up accelerates.

RICS issued its global practice guidance on AI in real estate valuation for public consultation in Q2 2026, with publication expected later in the year, aimed at supporting RICS Registered Valuers and regulated firms in the responsible, proportionate, and practical use of AI within property valuation practices. Regulatory frameworks catching up with practice is typically the moment institutional capital moves from cautious to committed.

What Hg Is Really Buying

The founders are clear on the direction: Heather and Tom Staff said, "We built Street to fundamentally change how estate and letting agents work, and AI is central to that mission." With this funding, Street Group plans to accelerate product innovation and deepen its AI capabilities.

Hg's track record is in scaling European SaaS businesses with dominant vertical positions, where switching costs are structural rather than contractual. At 4,000 agency offices, Street already has the kind of penetration that makes displacement expensive. Cortex adds an AI agent layer that deepens that stickiness with every workflow it absorbs.

The formation collapse in SIC 68.20 and the anaemic trademark filing rate among smaller letting operators suggest the addressable market is not expanding. It is consolidating. For a platform business selling into that consolidation, a shrinking pool of better-resourced agencies is arguably preferable to a crowded market of undercapitalised ones. That, in compressed form, is the Hg thesis.