Published on 28/04/25 & Updated on 25/06/25
With housing demand at an all-time high and greenfield development facing scrutiny, attention is shifting firmly towards brownfield land. These underused plots hold huge potential to deliver the homes and regeneration our nation urgently needs.
For developers, this raises the question: can you build on brownfield land?
The short answer is yes, though brownfield development comes with its unique challenges. Fortunately, new government proposals – and smarter tech – are making it easier for developers to identify brownfield land opportunities.
We’ll explore what brownfield land is below, including how policy is evolving to support brownfield first development, and how tools like Landstack are changing the game when it comes to sourcing brownfield sites.
Brownfield Land Defined
The term ‘brownfield land’ might seem explanatory, known as land that’s been built on before. While that’s broadly true, the actual definition is more nuanced, especially within the UK’s planning system.
According to the National Planning Policy Framework (NPPF), brownfield land is defined as ‘previously developed land’. Specifically, land that is or was occupied by a permanent structure.
However, this isn’t a catch-all definition. Several key types of land are excluded, even if they’ve seen some level of development in the past.
For example, land used for agriculture, mineral extraction, or landfill (where restoration plans have been approved) doesn’t count. Residential gardens, parks, and recreation grounds are also off the table.
Interestingly, if a site once hosted a structure, but nature has since reclaimed it, blending it back into the landscape, it might no longer qualify as a brownfield. This is a crucial point for developers. Leave a disused site too long, and it could lose its redevelopment status. You can also use the constraints layer in Landstack to view any Tree Preservation Orders.
In practice, brownfield land often includes disused offices, derelict industrial buildings, and other underutilised urban spaces. These plots can offer real potential for small to mid-sized residential developments, especially in built-up areas where space is tight.
However, brownfield isn’t limited to inner cities. Such sites can be found in towns, villages, and even within the Green Belt, though development in those areas often comes with more restrictions.
The takeaway? Brown land isn’t easily defined, not all brownfield land looks the same, and not every previously used site qualifies. If you’re considering development, it pays to do research early and understand where your land fits in the planning landscape. Our Landstack Districts page is a powerful tool to help you unlock dynamic planning data.
Embracing Brownfield-First: What’s Changing In Planning Policy?
One of the most talked-about proposals in the government’s planning shake-up is the introduction of the brownfield passport. This is a concept designed to make planning permission in urban areas faster and more accessible.
The idea is simple. If a site is previously developed and located within a town or city, the answer to development should default to ‘yes’.
The brownfield passport seeks to eliminate much of the red tape that slows down urban schemes, particularly those involving medium-density housing in well-connected areas.
Currently, the nature of the planning system means that even straightforward urban proposals can face lengthy delays or outright refusal.
This lack of certainty discourages developers and places unnecessary pressure on greenfield land at the fringes of towns and cities. It also limits the potential of our existing urban infrastructure, stifling density, suppressing housing supply, and contributing to the housing crisis.
The brownfield passport initiative won’t introduce a full zoning system (at least not yet), but it aims to shift how decisions are made by strengthening national policy in favour of brownfield development.
Key proposals under consideration include:
- Giving weight to the brownfield first principle, making it harder to refuse permission on urban sites without compelling justification.
- Allowing for greater building heights and density in strategically chosen locations, like areas near public transport or town centres.
- Aligning proposals with local design codes or existing urban form, which could limit the grounds for refusal if a development fits the area’s character.
If implemented well, these changes could act as a catalyst for brownfield-led regeneration across the country. They’re also a clear signal that the government is ready to back urban intensification, not just greenfield expansion, as part of the solution to our housing challenges.
For developers, this could mean less time battling policy and more time building homes where they’re needed most.
Want to learn more about industry-relevant policies? If so, read our guides on Class MA and Class Q opportunities for further insight.
Can You Build On Brownfield Land: The Trade-Offs
On the surface, the push to unlock brownfield land for development looks like a win-win – more homes, revitalised urban areas, and protection for the countryside. But, as with any ambitious policy shift, the reality is more complex.
While the government’s brownfield first strategy is designed to streamline planning and accelerate housebuilding, it also raises important questions about long-term quality, economic prospects, and whether the approach will deliver the scale of change that’s needed.
One of the biggest concerns is that, in trying to speed things up, the quality of development could take a hit. If brownfield approval becomes the default, there’s a risk that poor quality proposals might slip through more easily.
Fast-tracking the process could open the door to unsuitable builds that don’t meet local community expectations or the needs of future residents.
Then there’s the financial side. Brownfield sites may be plentiful on paper, but many come with a legacy of commercial or industrial use. This often means contamination, unstable ground, or outdated infrastructure.
Before a single brick is laid, developers may need to invest heavily in remediation and environmental improvements, as well as meet new biodiversity net gain (BNG) targets. These additional costs can be a major deterrent, particularly for smaller developers.
Additionally, many areas in the UK have been focusing on brownfield regeneration for years. Some of the most accessible sites have already been built on or snapped up for future development.
What’s left may require more investment and technical work, limiting the scale of any immediate impact. Doubling down on brownfield, without addressing the financial and logistical barriers, won’t magically unlock thousands of new homes.
Brownfield land offers huge potential, but it’s not a silver bullet. Careful planning, a focus on design quality, and funding support are crucial when transforming these sites into places where people actually want to live.
Getting Started: Is Your Brownfield Site Viable?
So you’ve spotted what looks like a promising brownfield plot. What next?
The first step is checking whether your chosen site appears on your local authority’s Brownfield Land Register.
Since 2018, councils in England have been required to keep a public list of previously developed sites considered suitable for housing. If your site is listed, that’s a great sign. It means the local authority already views it as a realistic candidate for residential development.
However, these registers aren’t exhaustive, so don’t worry if it’s not on there. Local authorities often rely on the public, including landowners and developers, to flag potential sites, particularly when putting new Local Plans together. This means that there may be a chance your site has flown under the radar.
Still, it’s important to investigate further. Just because land looks unused doesn’t mean it’s up for grabs.
Some plots, particularly former industrial sites, may be protected due to employment policies. A long vacant warehouse might not be a development opportunity if the local council wants to keep it for future business use.
How Landstack Can Help Developers Find Brownfield Land
Identifying viable brownfield sites can feel like finding a needle in a haystack, especially when public registers are inconsistent. That’s where our Site Finder feature comes in.
Site Finder, powered by AI, is built to take the guesswork out of land sourcing.
Rather than relying solely on public registers, Site Finder integrates multiple data layers to provide a dynamic, interactive map. You can pinpoint brownfield plots, often overlooked or underused, with just a few clicks.
Call us on 01285 706708 for more information, or browse our plans to see which one suits your needs best.