Why the Math Behind the 1.5 Million Housing Target Just Does Not Work

Everyone loves a big, bold political promise. When the government announced an ambitious target to build 1.5 million new homes over five years, it sounded like the radical shake-up the property market desperately needed. It averages out to 300,000 homes a year. Sounds simple on paper.

But it’s not happening. Read more on a connected issue: this related article.

The newest data from Savills drops a massive reality check on these ambitions. In the 12 months leading up to the first quarter of 2026, England managed to complete just 204,500 homes. While that’s a microscopic 1% bump from the previous quarter, it leaves an absolute chasm between political rhetoric and actual brick-and-mortar reality. If you look at what's coming down the pipeline, the outlook gets even grimmer.

We are tracking toward a massive shortfall. Savills explicitly warns that total completions over the five-year period are more likely to hit roughly 840,000. That’s a staggering 42% short of the government's headline goal. Further analysis by The Guardian highlights related views on this issue.

Understanding why this system is stalling requires looking past the political blame game and examining the actual plumbing of the UK housing sector.

The Illusion of the Planning Bottleneck

The go-to excuse for sluggish housebuilding is always the planning system. Politicians love to insist that ripping up red tape will magically unlock a wave of new developments.

It's true that the system is slow. But it isn't the only bottleneck.

Savills' data shows that around 186,000 homes gained planning consent in the year to March 2026. Yes, that is 45% below the peak we saw back in 2017. However, the real issue isn't just getting a rubber stamp from a local authority. It's what happens after permission is granted.

Right now, England has nearly 2.9 million homes sitting across 13,400 sites somewhere in the immediate planning pipeline. Roughly 6,500 of those sites already have full planning permission or a full application submitted. That represents about three and a half years of housing delivery just waiting for builders to show up.

So why aren't shovels hitting the dirt?

Because builders don't build at a loss. Private developers operate on a business model dictated by absorption rates—how fast they can sell homes without tanking local market prices. For a private volume housebuilder, throwing up 500 houses at once in a single town is financial suicide if the local buyer pool can only absorb 50 sales a year.

The Death of the Small Builder

To hit 300,000 homes a year, you need an army of builders. Instead, we have a heavily consolidated corporate oligopoly.

Look back to the late 1980s. The UK had more than 12,000 active small-and-medium-sized (SME) builders. They were the ones tackling smaller, local infill sites that big corporations don't care about. By the late 2010s, fewer than 3,000 of those smaller firms survived.

They got squeezed out by a combination of factors:

• Increasingly complex local regulations that require expensive legal and environmental consulting teams just to submit a bid.
• Section 106 demands, where councils insist on high percentages of "affordable housing" units, stripping away the razor-thin margins a family-run construction firm relies on to handle unforeseen costs.
• Squeezed development finance, with lenders refusing to fund smaller projects unless they have massive contingency buffers that make the project unviable from day one.

When a local council hikes an affordable housing quota from 25% to 50% on a small site, the big developers simply walk away and build elsewhere. The small developer, who doesn't have alternative sites, goes bust or leaves the market entirely.

Today, developers outside the top 10 largest housebuilders make up a shrinking slice of the total housing supply. We're relying on a handful of corporate giants to hit a national target, and their primary duty is to their shareholders, not the government's manifesto.

The End of Help to Buy Left a Massive Void

You can't talk about the current shortfall without talking about the demand side. The housebuilding sector is still feeling the hangover from the end of the Help to Buy scheme in March 2023.

For a decade, Help to Buy acted as an artificial life-support system for the new-build market. At its peak in 2020/2021, the scheme propped up over 55,000 sales in a single year. Over its entire lifetime, it averaged around 39,000 supported sales annually.

When that scheme vanished, it left a massive black hole. Savills expects unsupported sales to individual buyers to level out at about 100,000 per year. Historically, that represents just 10% of total housing transactions—a baseline that hasn't fundamentally shifted in 50 years.

Without a major, state-backed demand support scheme to help buyers bypass soaring mortgage rates, expecting private individuals to magically purchase an extra 100,000 new builds a year is pure fantasy.

The Build to Rent Freeze

When the private sale market slowed down, everyone pointed to Build to Rent (BtR) as the sector that would pick up the slack. For a while, it did. Corporate landlords and institutional investors bought up entire blocks of flats to rent them out.

Not anymore.

The BtR sector has slammed into a wall. Construction starts in the alternative housing sector—which includes both affordable housing and BtR—plummeted by 14% on an annual basis in early 2026. If you look deeper, BtR starts across the country have collapsed by a brutal 59% from their peak a few years ago.

The turning point was the interest rate shock. When the Bank of England hiked rates to combat inflation, the financial math for institutional investors fundamentally broke. Suddenly, borrowing money to fund massive apartment blocks didn't make sense when compared to safer yields elsewhere.

In London, the collapse is staggering. The capital saw only about 1,000 BtR starts in the year leading to Q1 2026. Compare that to the peak of 8,500 starts in 2023.

For nine consecutive quarters, more build-to-rent homes have been finished than started. The pipeline is draining fast, and the number of BtR units currently under construction has dropped 17% year-on-year. This sector isn't rescuing the government's numbers anytime soon.

What it Means for the Property Market

If you're looking for a silver lining, it depends entirely on who you are.

For renters and first-time buyers, this structural failure means the affordability crisis is locked in for the foreseeable future. There simply aren't enough roofs to meet demand. Zoopla's data shows buyer demand rising despite high interest rates, creating an intense supply-demand mismatch that keeps a floor under prices.

For property investors and well-capitalized land buyers, this shortfall creates a highly predictable environment. Property values and rental yields are heavily insulated by this chronic lack of supply.

Savills points out a unique, short-term tactical play for land developers: because local authorities are failing their Housing Delivery Tests and running out of their mandatory five-year land supplies, the planning system is forced to default to a "presumption in favor of sustainable development."

Currently, 62 local authorities have had a total lack of land supply confirmed at appeal. This opens up a highly specific window for developers to push through smart planning applications on sites that local councils would normally reject out of hand.

Bridging the Gap

If the government genuinely wants to get close to its targets, it has to stop waiting for the private market to fix a public crisis. The fastest, most direct lever available is scaling up grant funding for the Affordable Homes Programme.

Social and affordable housing units don't suffer from the same market absorption constraints as private sales. A housing association doesn't have to worry about selling homes one by one to fragile buyers over twelve months; they can fill an entire block of social rented units on day one.

Until policy focuses on expanding the workforce, rebuilding the capacity of smaller local builders, and aggressively funding state-backed affordable delivery, the 1.5 million target will remain exactly what it is today: a fiction.