Source: Natural England
Agricultural Land Classification Map UK
Free Agricultural Land Classification maps showing Grade 1, 2, 3a Best and Most Versatile farmland protected under NPPF planning policy.
Updated: periodically as Natural England revises mapping · Last checked by Maplify: August 2026
What This Layer Shows
This layer maps Natural England's Agricultural Land Classification (ALC), grading farmland from Grade 1 (excellent) to Grade 5 (very poor) based on climate, site and soil factors. Grades 1, 2 and 3a together make up Best and Most Versatile (BMV) land — 37.4% of England's farmland.
Grade 3 is split into 3a (BMV) and 3b (not BMV), and national mapping is provisional — a site-specific ALC survey can give a more precise grading where the distinction matters for a specific application.
Why It Matters
NPPF paragraph 174 states that significant development of BMV agricultural land should be avoided, requiring developers to demonstrate through the Sequential Test that lower-grade land was not reasonably available. This makes ALC grade a key factor in site selection for greenfield housing and commercial schemes.
Developers and land promoters check this layer early because BMV status can materially affect a site's planning prospects, sometimes prompting a detailed site-specific ALC survey to challenge or confirm the provisional national grading.
How to Interpret the Map
Grade 1 - Excellent Quality
Very minor or no physical limitations. Deep, well-drained loamy soils. (2.6% of England)
Grade 2 - Very Good Quality
Minor limitations affecting crop choice. Good quality loamy or silty soils. (13.8% of England)
Grade 3a - Good Quality (BMV)
Moderate limitations from soil, gradient or climate. Good quality agricultural land. (21.0% of England)
Grade 3b - Moderate Quality
Moderate limitations, shallower or heavier textured soils. Not classed as BMV. (35.9% of England)
Grade 4 - Poor Quality
Severe limitations restricting crops. Mainly grassland. (16.5% of England)
Grade 5 - Very Poor Quality
Very severe limitations. Rough grazing only. (7.1% of England)
Planning and Development Implications
Applications proposing significant development on BMV land must pass the Sequential Test, showing that reasonably available lower-grade sites were considered first. Where BMV land cannot be avoided, applicants may need to justify the choice through exceptional circumstances or demonstrate that the specific site grading differs from the provisional national mapping via a detailed ALC survey.
Combining ALC grade with Green Belt, flood zone and other constraint layers gives a fuller feasibility picture for greenfield sites.
What to Do When a Site Is Affected
- 1Check the provisional ALC grade for the site using this map.
- 2Commission a detailed site-specific ALC survey if the site falls near the Grade 3a/3b boundary.
- 3Prepare Sequential Test evidence if significant development is proposed on BMV land.
- 4Combine ALC grade with Green Belt, flood zone and other constraint layers for a full feasibility picture.
- 5Engage a planning consultant early for sites where BMV status could affect scheme viability.
This is general guidance, not professional or legal advice — confirm specifics with the relevant authority or a qualified professional.
Official Data Source
Data Freshness
Important Limitations
- National ALC mapping is provisional — a site-specific survey gives a more precise grading for a specific parcel.
- The Grade 3a/3b boundary in particular often requires a detailed survey to confirm, since it materially affects BMV status.
- This map does not replace a formal Agricultural Land Classification survey for a planning application.
- ALC grade is one of several factors in site selection, alongside flood risk, Green Belt and other designations.
Common Use Cases
Property Developers
Screen greenfield sites for BMV status before committing to acquisition.
Land Promoters
Prepare Sequential Test evidence for sites affecting BMV land.
Planning Consultants
Advise on the evidential bar for developing agricultural land.
Farmers & Landowners
Understand the classification of land before considering development options.
Related Layers
Agricultural land checks are often run alongside these related searches.
Related Guides
Frequently Asked Questions
What is BMV agricultural land?
Best and Most Versatile (BMV) land comprises Grades 1, 2 and 3a — 37.4% of England's farmland. NPPF paragraph 174 states significant development of BMV land should be avoided and requires exceptional circumstances justification.
How are Agricultural Land Classification grades determined?
Natural England assesses climate, site and soil factors to grade farmland from Grade 1 (excellent) to Grade 5 (very poor), reflecting its versatility for different crop types.
Does BMV status prevent development?
Not automatically, but the Sequential Test requires developers to demonstrate that lower-grade land was not reasonably available before building on BMV land.
Can Grade 3 land be BMV or non-BMV?
Yes. Grade 3 is split into 3a (BMV) and 3b (not BMV) — a site-specific Agricultural Land Classification survey is often needed to determine which applies where mapping is indicative.
How current is the ALC data?
Natural England's provisional ALC mapping is a national-scale dataset; a detailed site survey gives a more precise grading for a specific parcel.
Check Agricultural Land Quality on Maplify
Free ALC mapping for England — view Grade 1, 2, 3a BMV land and all ALC grades instantly.
References and Methodology
Reviewed by the Maplify data & editorial team
Maplify displays official-source data for desktop screening and due diligence. We document where each dataset comes from, how it is processed, when it is checked and where its limitations matter.