Hartstone Holdings

The complete toolkit for serious UK property investors.

Underwrite deals, check HMO compliance, estimate refurb costs and find tradesmen — all in one workspace, for £1/month.

Explore the tools

Jump straight into any workflow.

Model BTL, BRRR, mortgage and cash purchases in one place.

Estimate refurb costs room-by-room with current UK rates.

Find live deals matched to your investment criteria.

Curated property opportunities ready to underwrite.

Project long-term cashflow, equity and yield trajectories.

Check floorplans against UK HMO licensing rules.

Trusted contractors for refurbs, BTL and HMO conversions.

Fractionalise property equity for syndicated investment.