The UK's Single Family Housing (SFH) sector has entered a new phase of growth and maturity, as operational stock surpasses 26,000 homes, and portfolio transactions become an increasingly important feature of the market, according to Knight Frank's latest Single Family Housing Report 2026.
There are now 26,407 operational SFH homes across the UK, with stock having more than tripled since 2020. A further 12,378 homes are currently under construction, supporting continued growth across the sector.
However, despite a growing development pipeline, delivery remains modest relative to underlying demand, which is creating significant opportunities for further institutional investment and portfolio growth.
In 2025, 31% of capital invested into SFH was spent on operational portfolios, up from less than 10% the previous year. This reflects growing investor interest in stabilised, income-producing assets as the market matures.
Lizzie Breckner, Head of Build to Rent Research at Knight Frank, said, "The SFH sector has evolved rapidly over the past five years. What was once viewed as an emerging part of the living sectors market is now establishing itself as a core institutional asset class.
“Yet, while we've seen significant growth in investment and delivery, supply still isn't keeping pace with demand.
"Structural shifts in tenure patterns mean households are renting for longer, creating a deeper pool of renters, particularly in the 35+ age cohort, who are seeking space and stability. With rental housing still in short supply, this continues to create opportunities for investors.”
The persistent shortage of rental housing continues to support rental growth across the UK, particularly for houses. Over the past five years, house rents have increased by 32%, compared with 21% for flats.
Since 2020, more than £7 billion has been invested into UK SFH, with investment accelerating sharply over the past 18 months. In 2025, SFH accounted for 55% of all Build to Rent (BTR) investment, overtaking multifamily housing for the first time.
In the report, Knight Frank notes that the relationship between institutional investors and housebuilders continues to be important. The firm's survey of 40 SME and volume housebuilders found that 60% view sales to institutional SFH investors as a necessity in current market conditions, while 33% say such transactions now form part of their long-term strategy.
Jack Hutchinson, Partner in Residential Investment at Knight Frank, said, "Housebuilders are increasingly recognising the role institutional capital can play in supporting delivery. These partnerships not only help developers maintain delivery targets but also provide investors with a scalable route into the market.
"That dynamic is attracting a greater range of capital, from established UK and North American markets to new entrants from Europe and APAC. Investors are increasingly drawn to the sector's strong fundamentals, growth potential and ability to build scale.
“As confidence in the sector continues to grow, we're seeing investors take a longer-term view of the opportunity and commit to increasingly ambitious expansion plans.”
Since 2020, 35% of investment into the sector has come from overseas capital, with investors from North America, Europe and Asia Pacific joining UK institutions, insurers and pension funds in targeting the asset class.
However, investor ambitions continue to outpace the sector's current scale. Across eight of the major market participants active today, ownership ambitions now exceed 55,000 homes, compared with around 13,000 currently owned, highlighting growing confidence in the long-term opportunity presented by the sector.
