Hidden Housing Supply: Where Are All the New Homes Going?

Why It Matters

The dwindling pool of homes available through traditional sales channels tightens competition for first‑time buyers and could accelerate a long‑term move toward renting as the dominant tenure.

Key Takeaways

• Only 10% of new homes reach open market in England 2024/25
• London sees just 2% of new builds listed for sale
• Build‑to‑rent and affordable schemes absorb majority of new supply
• Shrinking open‑market pool pressures first‑time buyers and prices
• Shift mirrors European rental‑heavy housing models

Pulse Analysis

The latest Alto report highlights a stark mismatch between construction output and market accessibility. While England delivered close to 200,000 new dwellings in 2024/25, only 21,261 were offered through estate‑agent channels that typical homebuyers use. This gap is most acute in London, where just over two percent of new builds appear on the open market, leaving prospective owners to compete for an increasingly scarce inventory. The data underscores a broader reallocation of supply toward institutional investors and social‑housing programs, fundamentally altering the traditional sales pipeline.

For buyers, the contraction of open‑market listings translates into heightened price pressure and longer search times, especially for first‑time purchasers. Build‑to‑rent (BTR) developments, which now capture a sizable slice of new construction, are often sold directly to investors rather than listed publicly, limiting transparency. Simultaneously, affordable and shared‑ownership schemes, while addressing policy goals, further siphon units away from the conventional for‑sale pool. This dynamic nudges the UK toward a housing landscape more reminiscent of France or Germany, where long‑term renting accounts for a larger share of tenure choices.

Policymakers and industry stakeholders face a choice: encourage a rebalance that restores a healthier mix of saleable homes or double down on the rental‑centric trajectory. Tools like Alto’s free mapping service provide granular insight into local availability, empowering consumers to make informed decisions. Potential interventions could include incentives for developers to allocate a minimum percentage of units to the open market, or regulatory adjustments that promote greater visibility of BTR offerings. As the sector evolves, monitoring the proportion of homes that actually reach buyers will be crucial for preserving homeownership pathways and preventing a systemic shift toward a predominantly renter‑based economy.