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The Landowner's Guide to BNG Income

BNG has created a new revenue stream for landowners. Here's how to turn your land into a habitat bank — from baseline survey through registration, unit sales, and 30-year management.

The opportunity

Biodiversity Net Gain has created a new tradeable commodity: biodiversity units. Developers who cannot deliver their full 10% uplift on-site must purchase off-site units from landowners who have created or enhanced habitat on their land.

Off-site biodiversity units currently sell for £20,000–£35,000+ per unit on the private market, depending on habitat type, location, and market conditions. For landowners with suitable land — particularly farmland, degraded land, or land near areas with high developer demand — this represents a significant income opportunity.

As of early 2026, the market has 197 registered gain sites covering ~7,000 hectares. But with 202 of 309 LPAs still having no registered habitat banks, there are major geographic supply gaps — representing opportunities for new entrants.

Key consideration: Creating a habitat bank is a 30-year commitment. You are legally obligated to manage and maintain the habitats for at least three decades. Unit pricing must be sufficient to cover the costs of creation, monitoring, and 30 years of management — not just a one-off payment.

Two pathways: habitat banking vs bespoke creation

Habitat banking

Build units in advance of sales

You begin habitat creation before securing a buyer. You build up a stock of biodiversity units that can be sold to developers as demand arises. This is the speculative route — you invest upfront and sell later, but you have a ready-to-go product when buyers come calling.

Bespoke creation

Create habitat to meet a specific development

You agree to create specific habitats to meet the requirements of a particular development, upon agreeing the sale of biodiversity units. This is the lower-risk route — you know your buyer before you invest — but it requires you to create habitats tailored to the developer's needs.

Both pathways follow the same core process, though the sequence differs slightly. The habitat banking route is more common among professional operators and provides greater flexibility.

The process step by step

1
Baseline survey & optioneering
6–16 weeks

Engage an ecologist to carry out a baseline habitat survey. This determines what habitats are currently present on your land and in what condition.

Then decide what habitats you want to create or enhance. You can enter your baseline habitats and planned enhancements into the off-site tab of the biodiversity metric to get an estimate of your biodiversity unit output.

Key considerations:

  • What habitats can your land realistically support? Soil type, hydrology, aspect, and location all matter.
  • What habitats are in demand locally? Check which trading tiers developers in your area need.
  • Higher-distinctiveness habitats generate more units per hectare but are harder to establish and may take longer to reach target condition (reducing the temporal multiplier).
  • Consider creating a mix of habitat types to appeal to the widest range of buyers.
  • Align with your Local Nature Recovery Strategy where possible — this boosts the strategic significance multiplier.
2
Legally securing the land
8–24 weeks

Before your site can be registered, the land must be legally secured for at least 30 years of habitat management. You have two options:

  • Conservation covenant — a private agreement with a designated responsible body (such as a Wildlife Trust or RSK Wilding). Often faster and more flexible.
  • Section 106 agreement — a planning obligation with your Local Planning Authority. More established but can be slower.

As part of this process, you must also agree a Habitat Management and Monitoring Plan (HMMP) with the responsible body or LPA. This sets out exactly how you will create, manage, and monitor the habitats over 30 years.

Cost tip: Responsible body fees vary significantly. Shop around — consider their geographic coverage, expertise in your habitat types, monitoring approach, and total cost over 30 years. See our Responsible Bodies Directory.

3
Registration
4–12 weeks

With the legal agreement in place, apply to register your land on the national Biodiversity Gain Sites Register, maintained by Natural England.

  • Natural England will assess your application against eligibility criteria
  • Once approved, your site will appear on the public register — making it visible to developers and brokers searching for off-site units
  • Registration does not commit you to selling units immediately — you can register and sell later
  • Habitat creation can begin as soon as the land is legally secured, even before registration is complete
Start early: Habitat creation can begin as soon as the legal agreement is signed — even before your site is registered. Earlier creation improves your temporal multiplier in the metric, meaning your units are worth more. Habitat banking (creating in advance of sales) takes advantage of this.
4
Selling biodiversity units
Ongoing

Once registered, you can begin selling biodiversity units to developers. Key considerations:

  • Developers will want to purchase units from specific habitat types that match their losses (in line with trading rules)
  • Units generated depend on the location of the development relative to your site (same LPA preferred, same NCA next) and habitat creation timings
  • Pricing must cover all costs: habitat creation, monitoring, and 30 years of management
  • You can sell to developers directly, through brokers, or through habitat bank operators
  • Be precautionary — sell only the units you are confident you can deliver. As the site matures and certainty increases, additional units can be sold
5
Recording allocations
Per transaction

When you sell units to a development, the allocation must be recorded on the register. Either you or the developer can do this (with your consent).

  • The LPA will check that the development has the correct allocation before approving the developer's Biodiversity Gain Plan
  • Once the gain plan is approved, the development can commence
6
30-year management & monitoring
30 years minimum

This is the long-term commitment at the heart of BNG for landowners:

  • Manage and monitor habitats for at least 30 years in line with the HMMP
  • Report on habitat progress to the responsible body or LPA at agreed intervals
  • If targets are not being met, the HMMP should include trigger points for remedial action
  • Consider building contingency into your financial planning — insurance products are emerging that can fund replacement units if outcomes aren't achieved

Revenue estimation

How much can you earn? This depends on your land's characteristics and the habitats you create. Here's a simplified example:

Example: 10 hectare former arable fieldBaseline: 10 ha × Low distinctiveness × Poor condition = low baseline value Proposed: Mixed grassland + hedgerow + scrub creation Estimated output: ~40–60 area habitat units + hedgerow units At £25,000 per unit: £1,000,000–£1,500,000 gross revenue Less: ecology, legal, creation, 30-year management = net revenue varies significantly
Don't forget the costs. Gross unit revenue is not profit. You must fund the ecologist, legal fees, responsible body costs, habitat creation works, and 30 years of management and monitoring. A common mistake is underpricing units and finding the 30-year management obligation cannot be funded. Get professional financial advice and price units to cover the full lifecycle cost.

Pricing your units

Unit pricing should reflect:

  • Habitat creation costs — earthworks, planting, seed mixes, fencing
  • Ecology consultancy — baseline survey, metric calculation, ongoing monitoring surveys
  • Legal costs — conservation covenant or S106, responsible body fees
  • 30-year management — annual management costs over the full obligation period
  • Monitoring and reporting — regular surveys and reports to the responsible body/LPA
  • Land opportunity cost — what income the land would generate under alternative uses for 30 years
  • Contingency — budget for remedial works if targets aren't met
  • Profit margin — a reasonable return on the capital and commitment involved

Market rates for off-site units are currently £20,000–£35,000+ per unit, varying by habitat type, geographic location, and local demand. Higher-distinctiveness habitats command higher prices. Sites in LPAs with no existing supply can often charge a premium.

Working with operators and brokers

You don't have to do everything yourself. Several models exist:

  • Self-management: You handle everything — survey, legal, registration, sales, and 30-year management. Maximum control and maximum revenue, but requires significant commitment and expertise.
  • Operator partnership: A habitat bank operator (such as Environment Bank or Wild Capital) takes a lease on your land and handles everything. You receive a guaranteed income stream or land rental without the management burden.
  • Broker-assisted: You create the habitat bank but use a broker to find buyers and negotiate sales. You retain management responsibility but get help with the commercial side.
Check demand in your area: Before committing to a habitat bank, check whether there is developer demand near your land. For detailed supply and demand analytics — including which LPAs have no existing habitat banks — visit ectare.dev.

Key considerations

  • The 30-year commitment is real. The obligation runs with the land — if you sell the land, the buyer inherits the management obligation. This will affect the land's market value.
  • Interaction with other land uses. BNG land generally cannot be used for agriculture or other income-generating activities during the 30-year period. Weigh the BNG income against 30 years of alternative income.
  • Interaction with agri-environment schemes. Consider how BNG sits alongside Environmental Land Management (ELM) schemes and other public funding. Some stacking may be possible but the rules are still evolving.
  • Lender implications. If the land is mortgaged, your lender will need to understand the 30-year obligation and its impact on the land's value. See the Lender Guide.
  • Dynamic habitats. Natural England's emerging guidance supports process-led habitat creation — habitats that are allowed to shift and develop naturally, rather than being managed to a rigid specification. This can reduce management costs but requires careful HMMP design.
  • Tax implications. Take professional tax advice on the treatment of BNG unit sales, management costs, and any capital gains implications.