The value of place is simultaneously the most discussed and the least understood of all things. House prices used to be the leitmotiv of a million clichéd dinner parties – no more, I think – but what we mean by the value of an actual neighbourhood and what drives that value is not only little discussed. It has, until recently, barely even been studied.
Create Street’s new report, Beyond Location, tries to answer this question. We have taken advantage of new techniques for analysing values as well as the big data revolution. We have conducted a uniquely wide, data-rich analysis of every 2016 property sale in six English cities (London, Birmingham, Manchester, Leeds, Liverpool and Newcastle).
This has used open datasets to compute basic urban characteristics, such as street network connectivity, population density, amount of greenery, availability of different transport modes. The point of the analysis was not to investigate them separately, but together – and to permit city-wide conclusions and inter-city comparisons.
The findings – part predictable, part surprising – tell us much about the state of our cities. One thing they do show is that urban form really does matter in understanding value. Our models for urban form can predict up to 74 per cent of the official UK poverty index – the Index of Multiple Deprivation – and up to 54 per cent of sales values.
How do specific characteristics affect the value of a London property?
Our key findings include that more greenery is not always a good thing. The immediate presence of attractive greenery or high-quality parks can add huge value in many situations. However, at the city-wide level, the presence of more greenery can be associated with lower as well as higher value. What it is and how it is managed really matters. For example, in London, a home closer than average to a high-quality park costs, on average, 11 per cent (or £51,000) more than one that is not, holding everything else equal. However, in Liverpool, a home located closer than average to a high-quality park is worth, on average, 7 per cent (or £7,760) less.
Land use and form also matters. We found significant relationships across the six cities between urban form and deprivation and value. Areas of high population and high areas of unbuilt land – for example, high-rise estates with lots of wide-open space – are less valuable and often associated with more deprived communities. This might be partly due to the history of post-war building but, after thirty years of right to buy, most people who can afford to choose continue to avoid this type of urban pattern
Population density and deprivation in London. Click to expand.
The heritage premium is more important than the new build premium. In every city studied, proximity to a listed building was associated with more additional value than the premium associated with a newly built home. A home closer than average to a listed building in London is worth 10.3 per cent (or £49,770) more than one that isn’t, holding everything else equal. The equivalent new build premium is only £8,795.
The findings also highlight a clear difference between London and the other British cities. Accessible income is driving an urban renaissance in London out of all proportion to that visible elsewhere in the UK. Walkable street-based networks or older properties have a value premium over other neighbourhoods which far exceeds that yet visible in other cities. Proximity to a listed building is associated with nearly seven times as much value premium in London as in the other cities studied.
Finally, diversity is valuable. Areas with more diversity of house types suffer from less deprivation. Areas with a more diverse offering of transport and amenities are normally worth more, other things being equal. Above average amenity diversity is associated with additional value in all cities studied.
Property value and connectivity in Newcastle. Click to expand.
Value is a fraught term. Extra value is not always a good thing – certainly not for everyone. In globally successful cities, spiralling house prices are forcing out existing communities. There are ‘sorting effects’, where the better off out-compete the less well-off for the best places.
The ultimate aim of this study therefore is to help developers to build and planners to permit more good places by understanding human preferences more richly.
One thing is for certain though. When it comes to understanding, and predicting, economic and social value, urban form and design really matters.
Alessandro Venerandi is a researcher and urban designer at Create Streets. He has recently completed his doctorate in urban sustainability and resilience at UCL. Beyond Location is available here.