Minimum Space Standards are making the housing crisis worse

A tiny house. Image: Getty.

One of the most controversial housing and planning reforms in recent years has been the introduction of office-to-residential conversions under permitted development. And the most critiqued feature of this reform has been the relaxation of national minimum space standards for these conversions. If you’ve read an article about “rabbit hutch” flats in recent years, it’s probably been about one of these office-to-residential conversions.

However, minimum space standards have their critics. Vera Kichanova in a recent paper for the Adam Smith Institute argued that “micro-housing” is the right choice for some people. And the urban economist Alain Bertaud compares them to calorie requirements – trying to use them to address a housing shortage is like trying to “solve a famine” by passing a law that everyone must eat 2,000 calories a day, instead of simply producing more food.

After numerous changes and standards, the Nationally Described Space Standards are the current iteration. The smallest properties which can be built under these standards are 37m2 for those one-bedroom dwellings with a single bed space, and 50m2 for one-bedroom dwellings with a double bed space.

The Centre for Cities’ recent report, Making Room, highlights a problem with having a single national standard though – people consume very different amounts of space in different cities.

For example, while the average urban resident in England and Wales has 37 m2of space, Figure 1 shows residents of Blackpool have on average 45m2 and residents of Slough have 27m2. This is not necessarily a problem, as land is cheaper in Blackpool and residents of Slough can save money on their high housing costs by using their expensive space more efficiently. But it means a single national space standard has little impact in cities like Blackpool where space is plentiful, but in cities like Slough it forces homes to be built which are too large for residents to afford.

Average space per resident, 2018. Source: EPC, 2019; ONS, 2011; ONS, 2017.

However, looking at space per person just shows how people currently consume housing. It shows neither the size of new and existing houses, or whether space standards are affecting supply.

Almost all new homes are larger than the minimum standard

Using data from the Energy Performance Certificate (EPC) register to look at almost 10 million homes in cities in England and Wales, it has for the first time become possible to see how large existing and new homes actually are.

Some 4.6 per cent of new homes built since 2011 are smaller than the lowest minimum space standard (37 m2). But this is almost identical to the existing stock – 4.5 per cent of homes built before 2011 are less than 37 m2 too. Similarly, Making Room showed that new homes are on average larger than existing homes, as though the average existing urban home in England and Wales is 84.8 m2, the average new urban home is 87.1 m2. This suggests that stories of “rabbit-hutch Britain, land of the ever-shrinking home” are somewhat exaggerated.

Share of Homes Smaller than 37m2 in English and Welsh cities, 2011-19. Click to expand.

But this does vary by city. As Figure 2 shows, more than 10 per cent of new homes since 2011 were smaller than the national minimum space standard in Sheffield (11 per cent), Nottingham (11 per cent), Luton (15 per cent), Liverpool (16 per cent), Leicester (18 per cent), and Oxford (20 per cent). This might be the result of those office-to-residential conversions which are exempt from the minimum space standard in the most expensive cities, but they could also be the result of lots of new-build student accommodation, which are exempt from space standards.

By contrast, while 4 per cent of new homes in London since 2011 are smaller than the minimum space standard of 37m2, so are 7 per cent of existing homes. Given how expensive homes are in London, this suggests that there is an unmet demand in the capital for new small flats of less than 37m2 in which, for example single people could live by themselves without having share with housemates.

Space standards also mean many new houses are too big

Looking at the share of houses under 37m2 only shows how many houses are smaller than the lowest minimum space standard. In practice: there are many different standards depending on the intended occupants, including a 50 m2 space standard for one-bed properties for two people.

The impact of space standards on new supply can be shown more clearly by plotting how much space new and old houses have on a graph (a histogram). Using a similar idea to a recent paper from Nolan Grey and Salim Furth of the Mercatus Institute, the graph below shows how large new (since 2011) and existing houses are across all cities in England and Wales.

Space in new and existing dwellings in English and Welsh cities, 2011-19. Source: Domestic Energy Performance Certificate Register, 2019. Dwellings below 10 sqm and above 200m2 have been dropped for data quality reasons, and account for 0.3 per cent and 1.8 per cent of all housing stock in cities respectively.  Click to expand.

Theoretically, these graphs should show a completely smooth curve, with very few tiny and huge houses, and the size of most houses somewhere around the middle. We almost see that in the distribution of existing homes, aside from a particular concentration of houses at around 47m2.

But with the supply of new housing, we see a much less smooth pattern. Instead, there is bunching at particular points. This bunching implies that not enough smaller homes are being built, if we accept the theory above that people’s demand for space is “smooth”. For instance, somebody wanting to rent a new 40 m2 property would have to be much luckier or search much longer and harder than if they accepted a far more common new 50 m2 property in their city, which would either cost them more or require them to share with a housemate.

There appears to be bunching in the supply of new homes across cities at around 50, 70, and 85 m2. These each match the space standards at 50 m2 for one-bedroom flats for two people, 70 m2 for both two-bedroom houses for three people and two-bedroom flats for four people, and 85 m2 for three-bedroom houses for four people. Although the link with space standards cannot be proven, if they were changing developer behaviour then you would expect to see bunching at these points.

This bunching can be seen even more clearly if we focus again on London in Figure 4. Rather than a single curve, there is a twin peaks effect, with the supply of new homes concentrated at the 50 and the 70 m2 mark, which align with the space standards described above. There is much less supply of new homes between these two points than we might expect in theory and compared to London’s existing housing stock.

Space in new and existing dwellings in London, 2011-19. Source: Domestic Energy Performance Certificate Register, 2019. Dwellings below 10 sqm and above 200 sqm have been dropped for data quality reasons, and account for 0.3 per cent and 1.8 per cent of all housing stock in cities respectively.

The minimum space standards also appear to limit the supply of housing in London. Although 17 per cent of new homes in London are below the two-person, one-bedroom space standard of 50m2 (which differs from the one-person standard of 37 m2), so are 23 per cent of existing homes in the capital.

This means there is a particular undersupply of small flats in London below this 50 m2 standard, which would be particularly suitable for single adults to live on their own and be self-reliant. Instead, such adults are forced to live like students and share with housemates well into their thirties in crumbling old Edwardian houses, while still consuming a small amount of space per person due to London’s high land values.

Space standards make the housing crisis worse and should be abolished

Not only do space standards force people to share, they also reduce the supply of dwellings by reducing the total number of units. Imagine a new apartment building which has 5,000 m2 of residential space which is under a strict minimum space standard of 50 m2 per flat, or 100 one-bed flats. If, to do some simple arithmetic, that 5,000 m2 could be provided as 30m2 flats (without changing the space needed for utilities or access), the same building could provide over 166 new, more affordable homes for people.

Some might respond to this saying it is wrong for people to live in small houses. But is it? Philosophically, what right do others have to insist that people should buy more housing than they actually want? Houses smaller than the current minimum space standards are the right choice for some people, and they should be allowed to live how they want, even in 8-9 m2 houses.

Other people live in houses which are currently too small for them and their families. But they already know this, and forcing new homes to be larger than they can afford does not solve the problem these families face. The right approach to improve housing conditions for these families is through redistribution and the welfare state to boost their purchasing power, such as through increasing housing benefit as Shelter have called for.

If anything, building more small homes is part of how policy can help make larger family homes more affordable. If it is common for many single adults to be forced to share large houses with each other, they will easily be outbid two-earner adult households when renting. If more small homes can be built for singles and couples, this will reduce the pressure on larger homes and free them up for families.

Contrary to the popular view, the problem isn’t that new houses in Britain are too small – it’s that many are far too big. Space standards should be abolished or at least substantially relaxed, not just to help solve the housing crisis, but to allow people to choose to live independently and with dignity.

Anthony Breach is an economic analyst at the Centre for Cities, on whose blog this post first appeared.


Here’s how we plant 2 billion more trees in the UK

A tree in Northallerton, North Yorkshire. Image: Getty.

The UK’s official climate advisor, the Committee on Climate Change (CCC), recently published a report outlining how to reduce the 12 per cent of greenhouse gas emissions that come from land use by two thirds by 2050. Alongside recommending cutting meat and dairy consumption by 20 per cent, the report calls for the annual creation of up to 50,000 hectares of broadleaf and conifer woodland for the next three decades. This would increase forest cover from 13 per cent to at least 17 per cent – a level not seen in Britain since before the Norman invasion.

Reforestation at that rate would mean creating roughly the area of the city of Leeds every year for the next three decades. At typical stocking densities of 1,500 stems per hectare, the ambition is to establish some 2.25 billion additional trees. Given that the UK, as with most of Europe, is in the grip of ash dieback, a disease likely to prove fatal for many millions of native ash trees, the scale of the challenge is massive.

On a crowded and intensively farmed island like Britain, unlocking a million and a half hectares of land will be no mean feat. But it’s not impossible – and is an unprecedented opportunity not only to tackle the climate crisis but also the biodiversity crisis that is every bit as detrimental to our wellbeing.

Trees and farms

One million and a half hectares is just 6 per cent of the mainland UK’s land area. To give some sense of perspective on this, 696,000 hectares of “temporary grassland” were registered in 2019. So if land supply is not the problem, what is? Often it’s cultural inertia. Farmers are firmly rooted to the land and perhaps understandably reluctant to stop producing food and instead become foresters. But the choice need not be so binary.

The intensification of agriculture has caused catastrophic declines in many species throughout the UK by reducing vast wooded areas and thousands of miles of hedgerows to small pockets of vegetation, isolating populations and making them more vulnerable to extinction.

Integrating trees with the farmed landscape delivers multiple benefits for farms and the environment. Reforestation doesn’t have to mean a return to the ecologically and culturally inappropriate single-species blocks of non-native conifers, which were planted en masse in the 1970s and 1980s. Incentivised under tax breaks to secure a domestic timber supply, many of the resulting plantations were located in places difficult or in some cases impossible to actually harvest.

Productive farmland needn’t be converted to woodland. Instead, that 4 per cent of land could be found by scattering trees more widely. After all, more trees on farmland is good for business. They prevent soil erosion and the run-off of pollutants, provide shade and shelter for livestock, a useful source of renewable fuel and year-round forage for pollinating insects.

The first tranche of tree planting could involve new hedgerows full of large trees, preferably with wide headlands of permanently untilled soils, providing further wildlife refuge.

Natural regeneration

Where appropriate, new woody habitats can be created simply by stopping how the land is currently used, such as by removing livestock. This process can be helped by scattering seeds in areas where seed sources are low. But patience is a virtue. If people can learn to tolerate less clipped and manicured landscapes, nature can run its own course.

A focus on deliberate tree planting also raises uncomfortable truths. Most trees are planted with an accompanying stake to keep them upright and a plastic shelter that protects the sapling from grazing damage. All too often, these shelters aren’t retrieved. Left to the elements, they break down into ever smaller pieces, and can be swept into rivers and eventually the ocean, where they threaten marine wildlife. Two billion tree shelters is a lot of plastic.

The main reason for using tree shelters at all is because the deer population in the UK is so high that in many places, it is all but impossible to establish new trees. This also has serious implications for existing woodland, which is prevented from naturally regenerating. In time, these trees will age and die, threatening the loss of the woodland itself. Climate change, pests and pathogens and the lack of a coordinated, centrally supported approach to deer management means the outlook for the UK’s existing treescape is uncertain at best.

An ecologically joined-up solution would be to reintroduce the natural predators of deer, such as lynx, wolves, and bears. Whether rewilding should get that far in the UK is still the subject of debate. Before that, perhaps the focus should be on providing the necessary habitat, rich in native trees.

A positive response would be to implement the balanced recommendations, made almost a decade ago in a government review, of creating more new habitat, improving what’s already there, and finding ways to link it together. Bigger, better, and more connected habitats.

But the UK is losing trees at increasing rates and not just through diseases. The recent removal of Victorian-era street trees in Sheffield and many other towns and cities is another issue to contend with. As the climate warms, increasing urban temperatures will mean cities need shade from street trees more than ever.

Trees aren’t the environmental panacea that the politicians might have people believe – even if they do make for great photo opportunities – but we do need more of them. Efforts to expand tree cover are underway across the world and the UK will benefit from contributing its share. Hitting the right balance – some commercial forestry, lots of new native woodland and millions of scattered trees – will be key to maximising the benefits they bring.

Nick Atkinson, Senior Lecturer in Ecology & Conservation, Nottingham Trent University.

This article is republished from The Conversation under a Creative Commons license. Read the original article.