LNRS Local Habitat Maps
What it is
The Local Habitat Map is the spatial output of a Local Nature Recovery Strategy — required under the Environment Act 2021. For its area, it maps two things:
- Areas of particular importance for biodiversity (existing valuable nature).
- Areas of opportunity — where creating or enhancing habitat would deliver the greatest benefit for nature recovery.
It is an opportunity/priority layer, not a survey inventory: its job is to say where action would matter most, agreed through a local, collaborative process.
How it's produced
Prepared by each responsible authority (typically an upper-tier or combined authority) with local partners and Natural England, combining existing habitat data, local knowledge, and agreed priorities. Because each strategy is produced independently, methodology, detail, and quality vary between areas.
Update frequency & currency
Published and revised on each strategy's own cycle. Coverage is being built up across England area by area — so at any moment some areas have mature maps, some have draft or early maps, and some have none yet.
Spatial resolution / precision
Varies by responsible authority — from carefully derived mapping to broad-brush opportunity zones. Read each area's map on its own terms.
Structurally, though, every published Local Habitat Map follows the same Defra data standard, in three layers:
| Layer | Content |
|---|---|
| Areas of Particular Importance for Biodiversity (APIB) | Existing designated/irreplaceable sites |
| Areas that Could Become of particular importance for Biodiversity (ACB) | Broad opportunity land |
| Mapped Measures | Priority level + measure code + description, attached to specific locations |
The Mapped Measures layer is the one with the fine-grained attributes — priority level, a measure code, and a text description of what should happen where — and it is the layer the BNG metric's strategic significance test actually checks against (see Strategic Significance Explained). The APIB/ACB boundaries are the layer most people picture when they hear "LNRS map," but on their own they only tell you a location is somewhere in scope — not what, specifically, the strategy wants there.
Known limitations
- Uneven coverage and maturity. Not yet England-wide; quality differs markedly between authorities.
- Priority, not proof. An "area of opportunity" is a strategic judgement, not confirmation of current habitat.
- Locally defined. Comparability across LNRS boundaries is imperfect.
- No single point of access. Each of the 48 responsible authorities publishes its own map independently — typically Shapefile/GeoJSON downloads through its own web-mapping site (often an Esri ArcGIS Experience) rather than one national portal. Defra has an aggregating national viewer in development, but it is not yet a substitute for checking the specific authority's own current publication. Some authorities publish attribute-rich, query-able layers; others publish a static PDF map — both are valid LNRS outputs, but only the former can be verified against a site boundary programmatically.
How it compares to Habitat Networks
Both are "where should we act?" opportunity layers, and they increasingly overlap:
| LNRS Local Habitat Maps | Habitat Networks | |
|---|---|---|
| Origin | Locally agreed strategy (Environment Act 2021) | National connectivity modelling |
| Nature | Priorities + opportunities, democratically set | Modelled ecological connectivity |
| Authority in BNG | Basis for the ×1.15 strategic significance tier | Strategic context (no direct multiplier) |
The LNRS map carries formal weight the network model doesn't — it is the emerging statutory basis for the high strategic significance multiplier.
Role in BNG assessment
Directly consequential: LNRS Local Habitat Maps are the emerging basis for the high tier of strategic significance — habitat delivered in an LNRS-identified location can earn the ×1.15 multiplier. They therefore steer where off-site gains are most valuable. Availability depends on whether the relevant area's LNRS has been published.
The test is narrower than "inside the shaded area," though. Once a strategy is published, the metric checks the proposed habitat against the Mapped Measures layer specifically — matching priority level, measure code, and description at that location — not just whether the parcel intersects the broader APIB/ACB boundary. A planning or ecology team checking someone else's claim needs the Mapped Measures attributes for the exact location, sourced from the responsible authority's own current publication, not a generalised "this area is LNRS priority" assertion.
The Local Habitat Map is the piece of the BNG data landscape most likely to change how off-site gains are sited over the next few years — because it plugs straight into the metric's strategic significance multiplier and carries real money. That also makes it the layer to treat most carefully: a ×1.15 is a strong incentive, and where an LNRS is thin the multiplier can reward a location the map blessed without deep evidence. Our approach is to read the specific area's LNRS before committing to a site, weigh how mature its mapping is, and use it as intended — a spatial signal of where nature recovery is a local priority — rather than as a checkbox that unlocks a better score.
Official source
- Local nature recovery strategies — GOV.UK
- Local nature recovery strategies: areas and responsible authorities — GOV.UK
- Environment Act 2021 — legislation.gov.uk
Last reviewed
13 July 2026. Revisit as LNRS publication progresses across England and as the statutory weight of the maps in planning and in the metric develops. If Defra's national aggregating viewer becomes the authoritative single access point, the "no single point of access" limitation above should be revised or removed.