Mulberry Business Park could be converted into more than 100 affordable homes in the coming years, according to proposals now under consideration. The scheme would see a commercial office site repurposed for residential use, adding to a growing roster of similar conversions taking place across England as local authorities and developers look to underused commercial stock to help plug the national shortfall in housing supply.
For UK property investors, this matters well beyond the fate of a single site. The conversion of office parks into homes has become one of the more reliable pressure valves for housing delivery in markets where greenfield development is constrained by planning, infrastructure cost or local opposition. Office-to-residential schemes typically move faster through the system than new-build developments on undeveloped land, because the principle of development on a brownfield, previously-commercial site is often easier to establish. Where affordable housing is specified, as appears to be the case at Mulberry Business Park, such projects also help local authorities meet statutory affordable housing targets at a time when section 106 contributions from traditional housebuilding have slowed alongside the broader market.
The economics of office conversion have shifted decisively in favour of residential use over the past several years. Hybrid working has left swathes of secondary and tertiary office stock structurally obsolete, particularly business parks on the edge of towns and cities that were never designed to compete with prime city-centre space. Commercial landlords holding this kind of asset have faced a stark choice: reposition for a shrinking pool of office occupiers, or exit into alternative use. Residential, and particularly affordable residential, has increasingly looked like the more credible path to recovering value from stranded office assets, even where the headline return is lower than a traditional commercial letting would once have delivered.
The regional dimension here is worth dwelling on. Business parks of the type described at Mulberry are a familiar feature of the commercial landscape in towns and cities across England, from the fringes of Manchester and Leeds to office campuses around Birmingham, Newcastle and Liverpool, as well as the commuter belt around London including Surrey. Many of these sites were built in the 1980s and 1990s, an era of suburban office expansion that has not aged well against modern occupier demand for energy-efficient, well-connected, amenity-rich workspace. Where such parks sit close to transport links and existing residential catchments, as is often the case, they represent precisely the kind of site that planners are now more willing to see converted, because the housing delivered can draw on established local infrastructure rather than requiring new roads, schools and utilities from scratch.
For buy-to-let landlords and institutional investors in the private rented sector, affordable housing conversions of this kind are not directly competitive in the way that market-rent new-build schemes might be, but they do matter at the margin. Every unit of affordable housing delivered through conversion is one less unit of demand pressure feeding into the open rental market, particularly in areas where affordable supply has lagged badly behind need. First-time buyers stand to benefit more directly if any shared ownership or discounted market sale element forms part of the eventual tenure mix, though that detail has not yet been confirmed for this scheme. Developers and commercial investors, meanwhile, should read this as further confirmation that the office-to-residential conversion pipeline remains an active and growing segment of the market, one that rewards those with the planning expertise and construction capability to execute change-of-use schemes efficiently.
Looking ahead over the next six to twelve months, PropertyNews expects the pace of office-to-residential conversion activity to continue building, particularly among secondary business park stock of the kind represented by Mulberry. Interest rate pressure on commercial property valuations has made holding under-let office assets increasingly unattractive, while the political and planning environment continues to favour brownfield housing delivery over greenfield alternatives. Local authorities under pressure to demonstrate progress against housing targets have every incentive to support viable conversion schemes, especially where an affordable housing component is already built into the proposal. Investors tracking this trend should watch not just the headline conversion numbers but the tenure mix, since the balance between affordable and market housing will determine how directly these schemes affect rental markets, first-time buyer supply and the wider investment case for secondary office assets elsewhere in the country.
The proposal for Mulberry Business Park is, on its own, a modest story. But it is a useful marker of a structural shift that is reshaping both the commercial and residential ends of the UK property market simultaneously. Office obsolescence is creating a steady supply of conversion opportunities precisely as the country grapples with a chronic housing shortfall, and schemes of this type, delivering affordable homes on previously commercial land, are likely to become a more common feature of the development landscape rather than an exception to it.
