UK Housing Market Faces Crisis as Construction Costs Skyrocket

The number of new homes being built in Britain has fallen sharply, with construction output experiencing its fastest decline in six years, according to the latest S&P Global UK Construction PMI. This marks the seventeenth consecutive month of decreased activity in the sector. Annual planning consents for new homes dropped by 39% in the three years leading up to the end of 2025, while construction starts decreased by 31% over the same period.

The primary drivers behind this slowdown are a combination of falling house prices and significantly higher build costs. Property experts indicate that housebuilders are halting projects because the financial equation no longer adds up.

Rising Construction Expenses

On average, the cost to build a new home has increased by £76,000 since 2020, according to research from the Home Builders Federation (HBF). Data from the Building Cost Information Service (BCIS) shows that average building costs have risen by 50% over the past decade. In London, the cost to build a typical two-bedroom flat has surged by approximately 75% since 2016, increasing from £245,000 to around £430,000. During the same timeframe, the average value of a flat in London has risen by only about 6%.

Approximately half of this increased cost is attributed to rising material and labor expenses, while the other half is due to regulations, levies, and taxes. The severity of the situation has led to thousands of homes being halted on development sites across the capital, with construction firms going out of business or deliberately pausing work due to a weak sales market.

Regulatory and Design Burdens

Beyond inflation, a variety of factors contribute to the escalating costs. Pre-pandemic pressures including labor shortages, rising material prices, and currency depreciation following the EU referendum were intensified by global supply chain disruptions, extreme energy price inflation, and market volatility. Furthermore, regulatory changes related to fire safety and energy efficiency have added to expenses.

Housebuilders are also required to pay Community Infrastructure Levies (CIL) to local councils, which can add significantly to the cost per home. In London, these levies have been particularly high, with one development incurring nearly £90 million, adding approximately £50,000 to the cost of each home. Many boroughs are reviewing and increasing these levies, averaging an additional £16,000 per home.

New design standards in London mandate specific features such as a higher proportion of dual-aspect homes and minimum private outdoor space requirements, adding more than £20,000 to the cost of an average home. Additionally, requirements for more extensive cycle storage, even if underutilized, contribute to costs. In England, new residential buildings 18 meters or taller (typically six stories or more) now require a second staircase, further increasing expenses.

Diminished Buyer Demand

A critical issue is the declining ability and willingness of buyers to meet the prices set by housebuilders. Higher mortgage rates have significantly impacted affordability, particularly for first-time buyers. The difference in monthly payments between a 1.5% mortgage rate five years ago and the current typical 4.5% rate on a £300,000 loan over 25 years amounts to approximately £467 per month.

Despite income increases, rising inflation and frozen income tax thresholds have diminished buyers' capacity to absorb higher mortgage costs. Property investors are also purchasing fewer homes due to increased taxes and regulations, leading many to sell their existing properties. The share of new homes sold off-plan has reached its lowest proportion since 2013, with off-plan sales in London dropping from over 60% in 2014 to just 11% in 2025.

The cessation of the Help to Buy scheme, which previously supported demand for new-build flats, has also impacted the market. Between 2013 and 2021, the scheme facilitated over 375,000 home purchases, predominantly new-build flats. Since its end, new home completions have fallen by 10.2% in the two years to March 2025.

Leasehold Concerns and Market Conditions

Buyers are also deterred by nervousness surrounding leasehold properties and high service charges, which now average £2,845 annually across the UK and £3,919 in London. In a strained housing market, the value of new build homes depreciates significantly upon purchase, a factor amplified when second-hand home prices are only marginally increasing. Concerns about complex leasehold laws and substantial repair bills for apartment blocks further depress prices.

The current market conditions, characterized by reduced buyer demand and increased construction costs, have led to a substantial decline in new home construction, creating a challenging environment for both builders and prospective homeowners. The impact of rising mortgage rates, coupled with regulatory and design cost increases, has created a significant barrier to new housing development.