Biodiversity Net Gain going mandatory under the Environment Act 2021 wasn't a regulatory trend. It was a structural shift — one that embedded non-discretionary demand for environmental consultancy services into every significant planning application in England, effectively overnight.
The mandatory 10% biodiversity net gain requirement means that developers cannot progress planning applications without engaging qualified environmental professionals to deliver baseline habitat assessments and management plans. That demand is not cyclical. It doesn't depend on market conditions or interest rate cycles or planning policy appetite. It is a legal requirement that applies to hundreds of thousands of planning applications each year, and the supply of qualified practitioners to service it has not come close to keeping pace.
Private equity has noticed. Environmental services has become one of the more actively acquired categories in the UK lower mid-market over the past three years, attracting both trade consolidators and institutional capital that recognises the combination of regulatory-driven demand, pricing power, and structural barriers to entry. But the macro attractiveness doesn't confer equally on every business in the sector. Understanding what buyers are actually paying for — and what gets discounted or missed — matters whether you're building, considering a sale, or advising businesses in the space.
Non-discretionary demand is only valuable if the business is positioned to capture it
The BNG requirement creates demand. It doesn't automatically route that demand to any particular firm.
The businesses that have captured the most durable share of this demand are those that moved early — establishing the accreditations, methodologies, and client relationships that put them inside the planning process rather than chasing individual project opportunities. Framework agreements with local authorities, Homes England, National Highways, and major infrastructure clients are genuinely valuable assets in this market. They represent visible forward pipeline with limited re-solicitation risk, which is exactly what institutional buyers want to see when they're modelling the acquisition case.
Businesses that don't have framework coverage — that compete for individual projects through open procurement — are more exposed to volume volatility and pricing pressure, even in a strong demand environment. The consultancy with three framework agreements covering 60% of its revenue is a fundamentally different business to one with the same top line but project-by-project dependency, even if the headline numbers look similar.
Framework agreements aren't just commercial relationships — they're evidence of credibility and track record in a sector where reputation travels quickly and qualification thresholds genuinely filter out weaker operators.
Net zero commitments from large corporates, local authorities, and infrastructure owners are creating a parallel dynamic to BNG. Scope 3 reporting requirements, decarbonisation advisory, and climate adaptation planning are all generating specialist demand that wasn't present five years ago. The UK's statutory net zero target by 2050 under the Climate Change Act means this is a regulatory pipeline with a multi-decade horizon — not a short cycle that a buyer needs to worry about timing.
What institutional capital is actually buying — and what it consistently misses
PE investment in environmental consultancy is not primarily a bet on any individual firm's reputation or team. It's a bet on the regulatory framework being durable — on the view that environmental compliance obligations are structurally embedded into economic activity and will only deepen over time as UK climate and biodiversity targets tighten further.
Individual businesses are the vehicle for accessing that exposure. Which means what buyers are really paying for is the quality of the access — the frameworks, the accreditations, the client relationships, the technical reputation — rather than any particular revenue multiple on its own terms.
What many generalist buyers systematically underestimate is how different the operational model of an environmental consultancy looks from the inside. The workforce economics are not like professional services in other sectors. Qualified ecologists, environmental scientists, and chartered planners with BNG competency take years to develop, cannot be hired quickly into a scaling business, and move jobs at rates that are significantly higher than in comparable sectors. A business that looks attractive on revenue and margin can become significantly more complex to operate if the workforce model is fragile.
The revenue split between public and private sector clients is also frequently underweighted in initial analysis. Environmental consultancies with high public sector revenue concentration — local authorities, government agencies, publicly funded infrastructure — carry a different risk profile to those serving private developers, in terms of both payment timing and procurement cycle risk. Neither is inherently better, but the implications for deal structure and working capital are real and worth understanding in detail before committing to a valuation.
The workforce question that acquirers probe hardest — and founders answer least well
In almost every management meeting we've been part of or advised on in this sector, the talent question is where the conversation gets most interesting — and where the founder is most likely to be caught unprepared.
Buyers know that the primary constraint on growth in environmental consultancy is not demand — it's the ability to hire and retain qualified people fast enough to service it. That means the quality of the firm's talent pipeline, its reputation as an employer in the ecology and environmental science community, and its graduate training infrastructure are not peripheral considerations. They're central to the acquisition case.
The businesses that handle this question well have invested deliberately in building that pipeline. They have graduate programmes that are recognised and respected in the sector. They can point to ecologists who joined as graduates and are now project leads. They have retention rates they're comfortable being transparent about. These are the businesses that attract the highest quality of institutional interest, because a buyer can see a path to scaling the workforce in line with the revenue opportunity.
In a sector where demand materially exceeds supply, the constraint on growth is talent. An acquirer who doesn't understand that going in will discover it the expensive way post-completion.
Not every business in this sector benefits from the tailwind equally
The regulatory tailwind is real. But it's worth being honest about who it serves.
Businesses that are overly concentrated on a single regulatory requirement — BNG specifically — are carrying a concentration risk that deserves acknowledgement. Policy can evolve, implementation timelines can shift, and the competitive landscape will change as more entrants recognise the opportunity and build the credentials to pursue it. The firms that have built breadth — across BNG, net zero advisory, environmental impact assessment, water quality, habitat management — are more resilient than those that have moved quickly into one emerging area without developing adjacent capability.
Geographic concentration matters too. A business operating primarily in one region of England carries different risk than one with national coverage, particularly as framework agreements and local authority relationships are inherently geographic. The most resilient businesses have built deliberately across regulatory requirements, client sectors, and geography — not because they were thinking about their exit multiple, but because it makes for a genuinely better business.
At Eranos, we work with environmental consultancy owners who are thinking about their strategic options — whether that's preparing for a sale process, understanding what an acquirer would actually see if they looked at the business today, or thinking about how to build the kind of business that achieves the outcome they want on their terms. If you're in that position, we're worth a conversation.
Published by Eranos ·