Julia Park urges the prime minister not to throw away one of his biggest achievements as mayor of London

Julia Park

Dear Prime Minister,

As Mayor of London you did a great deal to improve the quality of London’s new housing. Through the London Housing Design Guide you brought in a total of 75 housing standards. Despite some early resistance the guide soon proved universally popular, even with developers. Forward looking, but achievable in practice, it has been emulated by many local authorities here and elsewhere in the world.

Arguably, your greatest legacy was the introduction of internal space standards. Dubbed the “Parker Boris Standards” (after the famous Parker Morris of the 1960s), your version was not just better; it was the first space standard to apply to all tenures.

Your pledge to “end hobbit homes” soon became legendary, though you may remember that you took some convincing to reduce the minimum size for a single-person home from 50sq m to 37sq m. Give (or more accurately, take) that 13sq m climb-down, in 2015, your standard was adopted across the country as the Nationally Described Space Standard (NDSS).

Regrettably, ministers lacked your confidence. Rather than make it mandatory, it was left to local authorities to justify adoption, creating what your predecessor recently referred to as “a postcode lottery”.

You also set ambitious targets for carbon reduction (remember “lean, clean and green”?), brought in the Lifetime Homes Standard (helping hundreds of thousands of older and disabled people remain more independent) and introduced a simple standard for daylight (requiring every habitable room to have a window equivalent to at least 20% of its floor area).

You even required dedicated play space in every development for 10 or more children, insisted that every new home should have some private open space (at least a balcony of 5sq m) and much more besides. There was almost no stopping you.

It was all going swimmingly until 2013, when Permitted Development Rights (PDR), allowing office buildings to be converted to housing without requiring normal planning permission, were introduced. It meant that none of your 75 standards could be applied to these developments, even in London. If there were any lingering doubts about the need to protect basic attributes, they soon evaporated.

>> Also read: BD’s news story about the campaign to end permitted development

>> Also read: A new low in office-to-residential conversions


Six years and at least 42,000 homes later (experts believe the real number is nearer 70,000), we have thousands of tiny, inaccessible new homes with no outdoor space. Single room “studios” of 13sq m are not uncommon and one of just 8.3sq m has also come to light. If you deduct 2.5sq m for a small shower/toilet cubicle, the “13sq m home” reduces to 10.5sq m (considerably smaller than the 12sq m you required for a double bedroom) and the “8.3sq m home”, to 5.8sq m (well below the 8sq m you required for a child’s bedroom).

These rooms are not just used for sleeping, though. They are also where their hapless occupants, (including families) sit, cook, eat, study, play, exercise, socialise, bathe and store everything they possess.

As our report shows, some of these homes have no windows either. This shed on an industrial estate in Watford, has Prior Approval to become 15 flats. Seven of them (including six in the roof with crawling height only at the edges) will have no daylight at all. Here is the building, viewed from the front:

Wellstones, Watford

Wellstones, Watford

We imagine that you are as concerned about this as we are. It must be very distressing to see your standards tossed aside as though they no longer matter.

>> Also read: Another council clamps down on permitted development


The homes created under PDR may just about be fit for hobbits but they are certainly not fit for human habitation – as defined under the new Homes (Fitness for Human Habitation) Act 2018.

As prime minister, this must be of grave concern to you.

We would therefore like to invite you to be among the first to sign our petition to end PDR.

Yours sincerely,

Julia Park, Levitt Bernstein