National Landscapes (AONBs): what the designation means
Policy Explained
The name changed in 2023 and the legal duty changed in 2024 — but the land, and what the protection does to what you can build, are what actually matter.
Outside a National Landscape, a single-storey rear extension on a detached house can reach eight metres on nothing more than a prior-approval notification. Inside one, that right does not exist: the cap drops to four metres, a side extension is off the table, and cladding a rear wall in timber or render — waved through almost anywhere else — becomes a planning application, or an enforcement case if you build it anyway.
That gap is the whole point of the designation. This guide sets out what a National Landscape actually is, the law that creates it, why the 2023 rebrand and the 2024 duty change matter, and exactly how the status changes what you can build — from full applications down to the permitted development rights people most often get wrong.
National Landscape, AONB — same land, same protection
On 22 November 2023, every Area of Outstanding Natural Beauty in England and Wales started trading under a new name: National Landscape. The change was led by the National Landscapes Association (formerly the National Association for AONBs) and followed the 2019 independent Landscapes Review by Julian Glover, which argued the “AONB” label was poorly understood and undersold areas that sit on a par with National Parks.
Here is the part that trips people up: the rebrand changed the name, not the law. “Area of outstanding natural beauty” is still the legal term used in statute, in local plans and in most planning decisions. The designation, its purpose, and the powers and duties attached to it are all unchanged. So if your title deeds, a neighbour, or a planning officer refer to an AONB, they mean precisely the same land — and the same protection — as the visitor-centre sign that now reads National Landscape. The eight AONBs in Northern Ireland kept the old name, because they sit under separate legislation.
How much land this covers
There are 34 National Landscapes in England, covering roughly 15% of the country — from the Cotswolds (the largest) to the Isles of Scilly (the smallest). Across the wider UK network the figure usually quoted is 46, which counts England, Wales and Northern Ireland together, even though the Northern Irish areas retain the AONB name. Whichever number you use, the practical point is the same: this is not a rare edge case. A great many ordinary homes, farms and development sites sit inside the boundary.
Interactive check
Is your property in a National Landscape?
Enter an English postcode to see whether it falls inside a National Landscape (AONB) — and whether a National Park, conservation area or Article 4 direction also applies. Indicative guide only.
Boundary data: planning.data.gov.uk (© Natural England, Open Government Licence). A guide, not a formal determination — confirm with your local planning authority or the free Planning Quiz.
The law that creates the designation
The framework began with the National Parks and Access to the Countryside Act 1949, under which the first AONB — the Gower in South Wales — was designated in 1956. The current statutory basis is Part IV of the CRoW Act 2000, s.82.
Under that section, Natural England designates an area by making an order — confirmed by the Secretary of State — where it is satisfied the land is of such outstanding natural beauty that conserving and enhancing it is in the national interest. “Natural beauty” is read broadly: section 92(2) confirms it includes an area’s flora, fauna and geological and physiographical features, not just its scenery. Natural England weighs factors such as landscape and scenic quality, relative wildness and tranquillity, and natural and cultural heritage.
Two features matter for anyone dealing with the planning system. First, unlike a National Park, a National Landscape does not have its own planning authority — your ordinary local planning authority still decides applications, advised by a small National Landscape team. Second, every designation must have a management plan, reviewed at least every five years under CRoW Act 2000, s.89. That plan is a material consideration in planning decisions, so it is worth reading before you design anything.
What changed in 2023: a stronger duty
The substantive change of the last few years was not the name — it was a single verb. LURA 2023, s.245 amended the general duty in CRoW Act 2000, s.85, replacing the requirement that public bodies have regard to the purpose of a National Landscape with a requirement to seek to further it. The new duty took effect on 26 December 2023, and the Government’s own guidance was updated in November 2024 to reflect it.
The distinction is real. The old duty was largely passive — an authority had to take the landscape into account and could then decide. The new duty is active: a relevant authority must take all reasonable steps to further the conservation and enhancement of natural beauty, and must be able to show positive evidence that it did, going beyond simply mitigating harm. It binds every relevant authority across all of their functions, not only planning, and it reaches land in the setting of a designation, not just land inside the line.
The courts are now testing how far this goes. In New Forest National Park Authority v Secretary of State [2025] EWHC 726, the High Court gave the first substantive ruling on the strengthened duty, confirming it is genuinely stronger than its predecessor. A separate challenge concerning the High Weald confirmed that the duty does not automatically forbid a decision causing some landscape harm — but it does demand evidence that the decision-maker actively sought to further the area’s purpose. For an applicant, the practical lesson is that a well-evidenced case for how a scheme positively contributes to the landscape now carries weight it did not before.
What it means for a planning application
When you do need permission, the designation reshapes how the application is judged. The NPPF, para 189 directs that great weight be given to conserving and enhancing landscape and scenic beauty in National Parks, the Broads and National Landscapes, which it describes as having the highest status of protection for these issues. The scale and extent of development should be limited, and development in the setting of a designation should be sensitively located and designed.
Larger schemes face a further hurdle. Under NPPF, para 190, planning permission for major development in a National Landscape should be refused other than in exceptional circumstances, and only where it can be shown to be in the public interest — with the decision-maker weighing the need for the development, the scope for meeting it elsewhere, and the extent of any harm and how far it could be moderated. Practitioners often call this the “great weight test,” and it is among the most stringent in routine planning practice.
In day-to-day terms, that pushes everything towards restraint and design quality: modest scale, materials that sit comfortably in the landscape, careful handling of glazing and external lighting (many National Landscapes are also Dark Sky areas), and, for anything substantial, a landscape and visual impact assessment. None of this makes development impossible — it makes a thin, generic scheme much more likely to fail.
Permitted development: what you can still do without applying
A National Landscape is “article 2(3) land” under the GPDO 2015, Sch.2 Pt.1 — a category that also captures conservation areas, National Parks, the Broads and World Heritage Sites. Permitted development is not switched off here, but several of the rights householders rely on are narrowed or removed. The table below summarises the householder rights that change most often.
Interactive
How much smaller is your rear extension here?
Single-storey rear extension depth allowed under permitted development. The dashed gold line shows the unconstrained limit; the green block shows what a National Landscape leaves you.
What changes on article 2(3) land
| Type of work | Normal right | In a National Landscape | What it means |
|---|---|---|---|
| Single-storey rear extensionClass A | Up to 8m / 6m | 4m / 3m | The larger-extension prior-approval scheme is withdrawn; cap is 4m detached, 3m for other houses. |
| Side extensionClass A | Permitted | Not permitted | Any extension beyond a side wall of the original house needs a planning application. |
| Two-storey rear extensionClass A | Permitted | Not permitted | More than single storey to the rear is excluded; full application required. |
| External claddingClass A | Permitted | Not permitted | Stone, artificial stone, pebble-dash, render, timber, plastic or tiles all need permission. |
| OutbuildingsClass E | Wider scope | ≤ 10m² if > 20m out | Beyond 20m from the house, total ground coverage must not exceed 10m². |
| Barn to homeClass Q | Permitted | Not available | Agricultural-to-dwelling prior approval does not apply on article 2(3) land. |
Two further points. First, a council can issue an Article 4 direction removing permitted development rights in a defined area — common within National Landscapes and conservation areas — so even the rights that survive may not apply to your street. Second, where you believe a project is permitted development, a Lawful Development Certificate is worth obtaining before you build: it confirms in writing that no permission is needed and protects you against a later enforcement dispute.
Buying or developing in a National Landscape
For buyers and developers the designation is a feasibility input, not a veto. The same protected setting that constrains development — the views, the tranquillity, the restraint on what neighbours can build — is usually what supports values in these areas. The trade-off is process: more applications where others would rely on permitted development, a higher policy bar for new building, and real money spent on design and, for larger sites, landscape assessment.
Sensible due diligence before you commit is straightforward: confirm exactly where the boundary runs relative to the property; check whether an Article 4 direction applies; read the relevant National Landscape management plan for site-specific policy; and budget for a considered design and any assessment a major or prominent scheme will need. New dwellings in the open countryside remain difficult, but replacement dwellings, settlement infill and conversions are far more realistic, and well-designed schemes do secure consent. The designation rewards quality and punishes the generic — which, in a National Landscape, is exactly the point.
How this advice is generated
Method: statutory facts are cited to the legislation itself; policy is cited to the current National Planning Policy Framework; practical ranges come from the GPDO and from consultancy practice; the from-practice example is a composite with identifying details altered. The article was drafted with AI assistance and then reviewed and fact-checked by a chartered town planner (MRTPI).
Data sources
- CRoW Act 2000, Part IV (legislation.gov.uk) — designation, duty and management plans.
- Levelling-up and Regeneration Act 2023, s.245 (legislation.gov.uk) — the strengthened duty.
- GPDO 2015, Schedule 2, Part 1 (legislation.gov.uk) — permitted development on article 2(3) land.
- National Planning Policy Framework, paras 189–190 (gov.uk) — planning weight and major development.
- Natural England / gov.uk designation guidance and the National Landscapes Association — rebrand, count and coverage.
Limitations of this guidance
- England-only; the legal framework and figures differ in Wales, Scotland and Northern Ireland.
- Policy and permitted development rights change; figures are current at the date of publication and should be confirmed against the legislation.
- Local variation matters: Article 4 directions, conditions and the relevant management plan can change what applies to a specific site.
- No guaranteed outcome — this is general guidance, not a substitute for tailored advice on your property.
FAQs
Is a National Landscape the same as an Area of Outstanding Natural Beauty?
Yes. “National Landscape” is the operating name adopted on 22 November 2023 for what the law still calls an Area of Outstanding Natural Beauty (AONB). The change was a rebrand led by the National Landscapes Association, not a change in law: the designation, its statutory purpose of conserving and enhancing natural beauty, and the powers and duties attached to it are all unchanged. “Area of outstanding natural beauty” remains the term used in legislation, in local plans and in most planning decisions, so if your title deeds or a planning officer refer to an AONB they mean exactly the same land and the same protection as the website that now says National Landscape. The only places that kept the old name are Northern Ireland’s eight AONBs, which sit under separate legislation. If you are unsure whether your property falls inside a designated area, PlanWiser’s free Planning Quiz will tell you which constraints apply before you commission any drawings.
Do I need planning permission to extend my house in a National Landscape?
Often, yes — for work that would be permitted development elsewhere. A National Landscape is “article 2(3) land” under the General Permitted Development Order 2015, which narrows the rights householders rely on. Side extensions are not permitted development here, rear extensions of more than one storey are not permitted, and the larger single-storey rear extension scheme (up to 8 metres on a detached house, 6 metres on others) is withdrawn — the cap drops back to 4 metres detached and 3 metres for everything else. Cladding the exterior in stone, render, timber, tiles or similar is also excluded. Outbuildings remain possible but are tightly sited. A single-storey rear extension within the smaller limits may still be permitted development, but an Article 4 direction or a planning condition can remove even that, so always check before you build. Where the work falls outside permitted development you need a full householder application. PlanWiser’s free Planning Quiz is the quickest way to see which of your rights survive the designation.
Can you build a new house in a National Landscape?
It is possible but uncommon, and the bar is high. National Landscapes carry the highest status of protection in planning policy for landscape and scenic beauty, so new dwellings in the open countryside are rarely granted. The National Planning Policy Framework asks decision-makers to give great weight to conserving and enhancing the landscape, to limit the scale and extent of development, and to refuse major development other than in exceptional circumstances where it is shown to be in the public interest. A single house is not usually “major development,” but it still has to clear the great-weight test, demonstrate exceptional design quality, sit comfortably in its setting and avoid harm to dark skies and tranquillity. Replacement dwellings, infill within a settlement, and conversions are generally more realistic than an isolated new build. Since December 2023 the council must also actively seek to further the area’s conservation, not merely take it into account. Schemes do succeed — but they succeed on design and siting, not on need alone.
What does the new duty to ‘seek to further’ mean for my planning application?
Section 245 of the Levelling-up and Regeneration Act 2023 changed the duty on councils and other public bodies from “have regard to” the purpose of a National Landscape to “seek to further” it. The change took effect on 26 December 2023 and amends section 85 of the Countryside and Rights of Way Act 2000. In practice the old duty was passive — the authority simply had to take the landscape into account. The new duty is active: the decision-maker must take all reasonable steps to further the conservation and enhancement of natural beauty, and must be able to show positive evidence that it did, not just that harm was mitigated. It applies to every relevant authority, to all of their functions and to land in the setting of a designation, not only land inside the boundary. The High Court has confirmed the duty is genuinely stronger, though it does not automatically forbid a decision that causes some landscape harm. For an applicant, it means a well-evidenced case for how a scheme positively contributes to the landscape now carries real weight.
Does National Landscape status affect my property’s value or what I can do with it?
It cuts both ways. The protected setting that makes a designated area desirable — the views, the tranquillity, the restraint on surrounding development — tends to support property values. The trade-off is reduced flexibility: tighter permitted development rights, a higher policy bar for new building, more emphasis on design and materials, and consultation with Natural England on significant schemes. For most owners that means an extension or conversion is still achievable, but it is more likely to need a planning application and a considered design than the same project on unconstrained land. If you are buying, treat the designation as part of the due diligence: confirm the boundary, check for an Article 4 direction, read the relevant National Landscape management plan, and price in the cost of a proper design and any landscape assessment. None of this makes development impossible — it makes the process more demanding and the design quality non-negotiable. PlanWiser’s free Planning Quiz flags these constraints for a specific address in a couple of minutes.
A National Landscape is an AONB with a clearer name and, since 2023, a sharper duty behind it. The land and the protection are the same as they have always been — the practical question is simply how the status shapes your particular project, which is exactly what a quick check on your address will tell you.
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A detailed snapshot for a specific address, including designation, policy and permitted-development analysis.
Order the snapshotHow this guide was researched
Drawn from primary legislation and current national planning policy, cross-checked against Natural England and National Landscapes Association material, and reviewed by a chartered town planner. England only; confirm any figure against the source before relying on it.
Sources
- Countryside and Rights of Way Act 2000, s.82 — legislation.gov.uk
- Countryside and Rights of Way Act 2000, s.85 — legislation.gov.uk
- Countryside and Rights of Way Act 2000, s.89 — legislation.gov.uk
- Levelling-up and Regeneration Act 2023, s.245 — legislation.gov.uk
- Town and Country Planning (GPDO) (England) Order 2015, Sch.2 — legislation.gov.uk
- National Planning Policy Framework, section 15 — gov.uk
- AONBs: designation and management — gov.uk / Natural England
