London-based Supa has secured £21M in seed funding to buy more of the local companies that manage blocks of flats across the UK, and to develop the software those firms run on. The round combines equity, co-led by venture investors 2150 and OpenOcean, with a debt facility from a major UK lender that Supa has not named. KOMPAS VC, Actia Capital Partners and HEARTFELT also invested, and the company has not disclosed how the total splits between equity and debt.
The startup says it now looks after about 20,000 homes through seven firms it has bought, including Hunters in Sussex, south-east England, FW Block Management in Hertfordshire, just north of London, and Lamberts in London. Supa also says its revenue has grown by more than 700% since it completed its first two acquisitions in late 2025.
Calum Brannan, Supa’s co-founder and chief executive, has built property technology businesses before. Supa’s website says he and co-founder Alexis Johnson previously ran Howsy, which was sold to estate agency group Dexters in 2022. Earlier, Brannan founded No Agent, a London platform for landlords that raised money from the public through crowdfunding in 2017.
Buying Firms, Keeping Their Names
Block management firms look after the shared parts of residential buildings, from repairs and insurance to safety checks. They are usually hired by freeholders, who own the building and the land beneath it, or by companies that leaseholders set up to run their own building. Leaseholders, who own their flats for a fixed number of years, pay for the work through service charges.
Supa buys established local firms and adds its own software, while each firm keeps its name, its staff and the buildings it manages. The software schedules repairs, matches service charge payments against the accounts, keeps safety compliance records and chases contractors. Supa says the system can cut property managers’ administrative time by up to 90%, although it has not published data to support the figure.
Supa’s website says residents receive line-by-line budgets and accounts, and that contractor costs are passed on without a mark-up. The company also says it discloses every commission it receives, including on insurance, and answers residents’ questions the same day. “Everyone should know what their service charge pays for, and get an answer when they call,” Brannan said.
A Sector Facing New Rules
Government figures estimate that 4.90 million homes in England were leasehold in 2024-25, about a fifth of the country’s housing. Flats made up 69% of that total. In announcing the round, Supa pointed to rising service charges, heavier administrative workloads and slow uptake of technology in a sector where many firms employ fewer than ten people.
The rules for the sector are also tightening. In July the UK government confirmed new transparency requirements for landlords in England, including standard forms for service charge demands, annual reports for leaseholders and service charge accounts signed off by qualified professionals. Landlords will also have to disclose their arrangements with managing agents, brokers and insurers. The changes take effect in stages from 2027.
Supa is not the only startup applying AI to residential property. Lette, based in Dublin, Ireland, announced a $6.5M seed round in October for software that handles leasing and resident operations for large landlords.
Supa is pairing acquisitions with automation. The local firms keep their names and staff, while Supa’s software takes on repairs, accounts and compliance records. Its £21M round will pay for more acquisitions as landlords in England prepare for new disclosure rules from 2027.
