Guidance

Sell biodiversity units as a land manager

StepsHow youto cansell takebiodiversity ifunits you want to selldevelopers making off-site biodiversitygains: unitsexplore tothe developers.market, register a gain site and record allocations.

Applies to England

AsThis adraft landguidance manager,explains youwhat couldwill be:apply when BNG becomes mandatory. We will continue to update this guidance.

  • a‘Land landownermanager’ refers to these different roles across the biodiversity net gain (BNG) guidance: 

    • landowner 
    • afarmer 

    • estate farmer

      owner 
    • habitat bank operator 
    • anfacilities, property or estate owner

      manager 
    • land agent 
    • aland localadvisor  

    • planning authority

      using land they own 
    • developer using land they own  

    Why you may choose to sell off-site biodiversity units  

    Under mandatory BNG legislation, developers must deliver a habitatbiodiversity banknet operatorgain of 10%.   

    If developers cannot achieve BNG on their own sites, they will have to make off-site gains by using off-site biodiversity units. Off-site means outside the red line boundary of the development that has planning permission requiring BNG.   

    You can sell biodiversity units to developers on:  

    • land you own 
    • a landowner’s land with their permission 

    For the purposes of BNG, biodiversity is measured in standardised biodiversity units.  

    Your land will contain a facilities,number propertyof orbiodiversity estateunits, managerdepending on factors like its:   

    • size   
    • quality   
    • location    

    aIn landorder agentto sell units, you will need to follow various steps, including: 

    • using the statutory biodiversity metric to prove the accurate calculation of how many units your habitats could generate 
    • registering your units as a landbiodiversity advisorgain site on a national public register 

    • recording on the register the allocation of the off-site gains to a developer, who will use it to achieve their BNG  

    How

    Selling in the BNG market is a choice for land managers. It is a potential source of revenue and could fund nature recovery work on your land.  You may, for instance, choose to generate and sell biodiversity units

    alongside farming, creating income from land that may otherwise be unsuitable for food production.

    You

    Obligations canand options when you sell biodiversity units for off-site biodiversitygain 

    Obligations 

    Once units:created, off-site units must be maintained for at least 30 years. 

    • The land manager is legally responsible for creating or enhancing habitat, and managing that habitat for at least 30 years to aachieve developerthe target condition. 

      The details of your obligations will depend on: 

      • which option you choose for selling your units 
      • what you agree in the legal agreement and habitat management and monitoring plan (HMMP) you make when you legally secure your units 

      Options for selling biodiversity units 

      There are 3 main ways you can sell to developments looking for off-site biodiversity units. Make an informed decision based on what is best for the land owner. 

      1. Sell biodiversity units independently 

      You’ll need to take full responsibility for following all the steps in partnershipthis guidance. 

      2.  Work with yourone or more partners  

      You can team up with a local authoritynon-governmental organisation (NGO) or other land managers. Depending on how many people you work with, you may be able to create large habitat banks. You would then sell biodiversity units as a group. As a group, you still need to follow all the steps in this guidance. 

      If you choose this option, you need to make sure you work out: 

      • who is responsible for which activities 
      • how you’ll share payments 

      through3. Use a habitat bank operator 

      A habitat bank operator leases your land and pays you a fixed fee on a regular basis, for example, monthly or yearly. Typically, the operator will try to find you a buyer and sell to them; legally secure your land; register your gain site and record its allocation, so you would not need to follow these steps yourself.

      Either the operator or the land manager may do the habitat creation, enhancement and management, as well as any reporting. You will need to agree all the details of who does what in your contract with the operator. 

      Make sure you check the contract with the operator to find out: 

      • who is responsible for which activities 
      • throughwhen aand broker

        how you’ll receive payment 
      • what will happen if the habitat doesn’t reach the target habitat condition 
      • onwhat awill tradinghappen platform

        if no units are sold within the period of the legal agreement 
      • what will happen if the habitat bank operator ceases trading 

      You can alsosearch goonline intoto partnershipfind habitat bank operators. Farmers’ organisations and publications may advertise them. 

      Combining BNG with other landenvironmental managerspayments 

      If toyou’re increasealready thereceiving areapayment youfor havecreating foror sale.enhancing Thishabitat, couldconsider behow foryou biggercan projects.combine BNG with other environmental payments.  

      When you cannot sell biodiversity units 

      You cannot sell biodiversity units or combine them with other environmental payments when you’re already required to create or enhance habitat for:for: 

      Protected

      Selling sites

      biodiversity units on protected sites 

      You may be able to enhance a protected site and sell the units for BNG.BNG. You must must get consent from Natural England before before you start work.work and renew consent as required. 

      You must ensure that any protected species licences required are in place before works commence. 

      Non-intertidal protected sites 

      You can enhance features that are not specified as one of the designated features of the protected site. You must not harm a designated feature.  

      Intertidal protected sites

      sites 

      You can enhance any intertidal habitat on a protected site, including designatedthe features,features iffor therewhich the site is nodesignated, appropriateprovided alternativethis habitat.is acceptable to the consenting organisation. 

      Non-intertidal

      How protectedto sites

      sell biodiversity units  

      This is an example order of steps, but the order of some steps is flexible.  

      You can enhanceregister your gain site: 

      • before recording the allocation of units to a featuredeveloper, thator 
      • at hasthe notsame beentime designated.you record the allocation 

      You mustcan notregister harmyour again designatedsite feature.and allocate units to a developer: 

      Get
      • before you sell your units  
      • at the same time as you sell your units  
      • after you sell your units 

      The 30-year BNG commitment starts from the completion of habitat enhancement works, as defined in your legal agreement. 

      You can begin habitat creation, enhancement and management on a gain site ready

      before allocating off-site units on it. This is called habitat banking. Or you can allocate the units and then begin the habitat work as soon as possible. 

      You can sell different units on one gain site to different developers. You would need to follow the steps in this guidance for each allocation of units to a developer. 

      1. Find out whathow many units you could sell and the habitat types you could create 

      You will need to consult a qualified ecologist who will do a survey and measure how many units you have on your existing habitat. There is guidance on how to do this, using the statutory biodiversity metric. Seek advice from relevant professionals (for example ecologists or land advisors) on your options to enhance the value of the habitats on your localsite, areaand needs.to understand how many units you could sell. 

      ToYou will get anmore ideaunits ofper whathectare habitatif you couldcreate, createenhance or enhance,restore checka whichparticular habitat that is strategic for your location. Your local nature recovery strategy (LNRS)will areamap yourstrategic landhabitats isfor in.your Ifarea. anWhere LNRSthis is not publishedyet forpublished, you can use the draft strategy, or another strategy your land,LPA askrecommends.  You can find your local planning authority (LPA)

      You forcan aconsider: 

      • creating draftand version,enhancing orhabitats forto meet the strategyBNG theyrequirements of a specific development, or 
      • creating and enhancing habitats that are applyingappropriate to your site conditions and locally in thedemand, areabefore untilmatching thewith LNRSa isdevelopment 

      2. published.

      Price your units 

      2.To Considerset howa price for your units, you canshould combinethink biodiversityabout netthe gaincost withof, for example: 

      • initial creation and enhancement of habitats 
      • management of the land covering at least 30 years 
      • monitoring and reporting 
      • ecologist or other environmentalexpert’s payments.costs 
      • insurance 
      • remedial work to correct any habitat management failures 

      • machinery, tools and other staff to carry out the tasks 
      • inflation   
      • consulting experts to review your legal agreement 

      YouIt canis combineimportant biodiversityto unitsensure andthat nutrientyour credits.pricing covers all of these costs over a minimum of 30 years to meet the obligations in your BNG legal agreement. You may be able to sellfind thembiodiversity alongsideunit otherpricing environmentalinformation payments.

      3.in Youonline willmarketplaces, needor tothrough calculateyour howlocal manyauthority biodiversityand unitsland youagents. Be mindful that different locations and types of projects will have pricing variations, and your prices should be based on your site.own costs to deliver the units.  

      You should useprice aunits qualifiedbased ecologiston tothe docosts this.incurred Theywhen willdoing dothe thishabitat calculationenhancement usingand not the biodiversitynumber metric.

      Youof units habitats will needgenerate. toA recalculatehabitat yourenhancement biodiversitymay unitsbe ifworth habitatmore wasunits createdto orone enhanceddeveloper onthan youranother. The land beforemanager’s 30price Januaryfor 2020.the Youwork canis dofixed, thisbut usingthe price per unit will go up or down depending on distance to the biodiversitydevelopment metric.site.  

      YouDefra canand createNatural England do not set off-site biodiversity unitsunit beforeprices. youStatutory sellbiodiversity them.credit Thisprices isare habitatnot banking.guideline prices for biodiversity units sold in the off-site private market. 

      4.

      3. Secure the landunits bywith a legal agreement

      agreement 

      You’llBefore needyou tocan commitregister toyour managinggain thesite, habitatyou formust athave leasta 30legal years.

      You’llagreement. needThis could be a planning obligation (sectionor, 106)if withyou anare LPAa orland owner, you can alternatively have a conservation covenantcovenant. The legal agreement must secure habitat enhancement and maintenance for at least 30 years. You make legal agreements with ayour local planning authority or another responsible body. They detail the habitat works you are committing to and the outcomes to be achieved.  

      You’ll also need to agreeprepare on a habitat management and monitoring plan (HMMP)(HMMP) withand youragree this with your LPA or or responsible body.body.  

      5.

      4. PriceFind a buyer for your units

      Tounits, comeif upyou withdo anot pricehave forone youralready 

      To units,explore youthe shouldprivate thinkmarket, aboutyou including:could: 

      • managementsearch ofonline thefor marketplaces 

      • consult a land coveringagent, atbroker leastor 30another years

        consultant 
      • speak with developers you already have links with  
      • monitoringspeak with your LPA, who may be able to signpost you to buyers in the market and reporting

        in some cases may act as informal brokers 
      • ecologistspeak orwith otherhabitat experts’bank costs

        operators who would try to organise a sale for you 
    • insuranceOff-site BNG is a private market and there is no guarantee you will find a buyer. 

5. Sell your units 

costsIt is up to coveryou workhow ifyou arrange the habitatsale, fails

  • machinery,including toolsany andcontract otherof staffsale you may choose to carryhave outwith the tasksbuyer. You may want to seek legal advice on making the sale. 

  • inflationWhen andplanning marketa competitioncontract costsof sale, you should consider including: 

    • the costnumber and type of expertsunits to reviewbe yourregistered legaland agreement

      allocated to a development (see steps 6 and 7) 
    • your commitment to record the allocation of units  

    You’llPrices needand payment terms should be agreed between you and the buyer.  

    The developer may not want to agreecomplete withthe sale of units until they are confident their biodiversity gain plan will be approved. You may wish to seek a deposit from the developer,developer responsibleto bodyreserve orthe LPAunits, whetherand accept full payment when the gain plan is approved and you allocate the units to the development. 

    You’ll need to agree whether you’ll get paid by:by: 

    • lump sumsum 
    • staged paymentpayment 
    • resultsresults 

    Registering6. Register your landgain site 

    You willmust need to register your land as a biodiversity gain site on the national biodiversity gain sites register, available when BNG becomes mandatory. This is operated by Natural England.  

    YouThe canregister selllists sites that are helping development projects achieve BNG. The purpose of the register is to show how and where developments are improving biodiversity off-site. It also prevents ‘double counting’, which would happen if the same units andwere allocateassigned themto multiple developments. Sites on the register may be allocated to specific construction projects to help them achieve their biodiversity gain target. The register does not contain contact details of available gain sites and is not a development‘matchmaking’ beforeservice orto afterconnect youbuyers register.and sellers.  Buyers and sellers will find each other through the private market.   

    If you’re registering someone else’s land, you must provide a signed, dated written statement from them as proof that you can do this on their behalf.behalf. 

    Personal information added as part of registration, such as names, addresses and contact information, will not be published in the public register.  

    7. Record the allocation of off-site units to a development 

    You (or the developer, with your permission) must record the allocation of off-site biodiversity gains to a development.  This service will be available when BNG becomes mandatory. 

    8. Manage the habitat for at least 30 years 

    Off-site units must be maintained for at least 30 years following the completion of habitat enhancement works, as defined in your legal agreement. 

    If habitat creation, enhancement and management work has not started by the time you record the allocation of off-site units, this should start within 12 months of allocation. 

    Further sources of information 

    Defra’s land use blog has published step by step BNG flowcharts for land managers.

    Give feedback on this guidance by completing a short survey.

  • Published 21 February 2023
    Last updated 1329 OctoberNovember 2023 + show all updates
    1. Updated with more detail throughout, ahead of biodiversity net gain becoming mandatory. This includes details on what we mean by ‘land manager’, why you may choose to sell biodiversity units, options and obligations, and steps for selling biodiversity units.

    2. Updated that you will need to register your land as a biodiversity gain site when BNG becomes mandatory (removed the date of November 2023).

    3. Amended the information under the 'Get your site ready' section as the local nature recovery strategy (LNRS) areas are now published. Removed the bullet list and replaced with a link and relevant guidance to the LNRS areas for land managers' reference.

    4. Added a new section on protected sites. Updated section on how to sell biodiversity units.

    5. Added link to feedback survey. Updated section on registering your land.

    6. First published.