Angela Rayner has unveiled an overhaul of England’s planning rules to help deliver Labour’s promise of 1.5m new homes by 2029.

The housing secretary said local housing targets, watered down by the Conservatives in 2022, would become mandatory again.

She also laid out plans to make it easier to build on low-quality green belt land that will be reclassified as “grey belt”.

Ms Rayner admitted her plans “won’t be without controversy” but changes were required to make housing more affordable.

But the Conservatives criticised the plans, adding they would force suburban areas to take more housing from urban Labour areas.

Under the plans, English councils will once again have to incorporate government-set housing targets into their long-term plans to allocate land.

Councils that previously failed to do so faced seeing their power to block new developments curbed.

But Rishi Sunak’s government downgraded them by saying they should only be advisory, in a bid to put down a rebellion of backbench Tory MPs in late 2022.

Speaking in the Commons, Ms Rayner cited it as an example of the Conservatives “caving in to anti-growth backbenchers” and putting “party before country”.

She added that new home starts were likely to drop below 200,000 this year, well below the previous government’s overall 300,000 target.

Labour also plans to change how the targets are calculated, including by ditching a 35% “uplift” for the biggest urban areas introduced by the Tories and tweaking how the formula accounts for housing affordability.

Official documents show the changes will mean councils overall will now have to plan for around 370,000 homes annually, instead of the current 305,000.

But some areas previously covered by the uplift will see their targets go down, with London’s figure dropping from just under 99,000 homes to around 80,000.

The housing secretary said the capital’s figure would still be a “huge ask” and said the previous target was “absolute nonsense”.

However, the changes were criticised by shadow housing secretary and Tory leadership hopeful Kemi Badenoch, who said it would result in more uncertainty.

She also argued it could force suburban and rural areas to take housing from Labour-held inner city areas.

Elsewhere, the government has given more details of its plan to make it easier to build on certain parts of the green belt, protected land that surrounds bigger cities.

It has said councils should look to reclassify as “grey belt” those areas that were previously developed, or make only a “limited contribution” towards goals such as protecting countryside and the special character of historic towns.

Officials said they could not say what proportion of the green belt, which covers 12% of England’s land area, would be reclassified, with the final amount depending on the choices made by local authorities.

Development in grey belt areas will be subject to new “golden rules”, including on the proportion of new homes that are classified as affordable.

Labour also plans to ditch a requirement for new homes to be beautiful, arguing it was too vague and had been interpreted differently in different areas.

The Greens called the planning shake-up a “distraction from Labour’s failure to step up and fund the real answers to the housing crisis, including large-scale investment in truly affordable, sustainable council housing.”