Article 1(5) land: what the designation removes

Article 1(5) land is the old name for designated land in the permitted development rules, and it is still the phrase most councils use on the phone. The label comes from the 1995 permitted development order. In the current order, the General Permitted Development Order 2015, the same land is called article 2(3) land. The categories and the restrictions carried across, so if a planning officer tells you your house is on article 1(5) land, they mean your permitted development rights are cut back, and they mean the list below.

The practical effect for a householder is simple to state. No side extensions. No two-storey rear extensions. No cladding. No dormer windows or other roof extensions. Smaller outbuildings at the far end of the garden. And a shorter conversation with the council about anything visible from the street.

What the designation covers

Article 2(3) of the 2015 Order defines the land. It comprises:

• Land within a conservation area.
• Land within an area of outstanding natural beauty, now presented publicly as a National Landscape although the statutory term has not changed.
• Land within a National Park.
• Land within the Broads.
• Land within a World Heritage Site.
• Land specified by the Secretary of State under the countryside amenity provisions of the wildlife legislation.

Note what is absent. A Site of Special Scientific Interest is not in this list, though it removes other rights elsewhere in the Order. Neither is a listed building, which has its own consent regime running alongside permitted development rather than instead of it. Nor is an Article 4 direction area, which is a separate mechanism covered further down.

The Part 1 rights it restricts

Part 1 of Schedule 2 contains the householder rights, and the restrictions on designated land sit inside each class rather than in one list. Reading them class by class is the only reliable way.

Class C is the one people miss, and it is useful. Rooflights remain permitted development on designated land, subject to the projection and position limits, which means a loft conversion lit by conservation-style rooflights can often proceed where a dormer cannot.

Side extensions and cladding

The side extension restriction is absolute in Part 1 Class A on designated land: the enlarged part must not extend beyond a wall forming a side elevation of the original house. A single-storey side extension that would be permitted development in a suburb needs a planning application in a conservation area.

Cladding is the restriction that surprises people mid-project. On designated land, cladding the exterior with stone, artificial stone, pebble dash, render, timber, plastic or tiles is not permitted development. Rendering the side wall of a Victorian terrace in a conservation area is development requiring permission, and enforcement officers do act on it because it is visible.

Repainting is different from cladding, though in a conservation area an Article 4 direction may have removed even that freedom, and on a listed building painting can require consent.

Outbuildings and the rear of the garden

Class E permits outbuildings within the curtilage, subject to height, position and coverage limits. Two of those limits change on designated land.

Nothing may be built on land between a side elevation of the house and the boundary. So the narrow strip beside the house, which is exactly where people want the bin store or the bike shed, is out.

And where a building is more than 20 metres from any wall of the house, the total area of ground covered by buildings in that zone is capped much more tightly than elsewhere. On a long garden that rules out the large garden studio at the bottom of the plot, which is the scheme most often built in the belief that distance from the house makes it easier.

Height limits apply everywhere: 2.5 metres within two metres of a boundary, and the usual ridge and eaves limits beyond. Nothing about designated land relaxes those.

Checking whether a site is caught

Do this before you draw anything.

1. Search the council's website for the conservation area map and appraisal, and find the boundary. Boundaries follow property lines and sometimes split a plot.
2. Check the national datasets for conservation areas, National Parks and National Landscapes, which are published as open data and are usually easier to read than a scanned council map.
3. Ask the council in writing whether the property is within a designated area and whether any Article 4 direction applies. A written answer is worth having.
4. Check the listed building register for the property and for anything adjoining, because a neighbour's listing can affect your curtilage position and the setting argument.
5. Where the answer matters financially, apply for a lawful development certificate. That is the only formal way to confirm that works are lawful, and it costs far less than an enforcement dispute.

Where a boundary splits a plot, the part inside the designation carries the restrictions and the part outside does not, which produces some odd outcomes on large gardens.

Where an Article 4 direction goes further

Designation under article 2(3) restricts specific rights. An Article 4 direction removes rights, and it can remove almost any of them, including the ones the designation leaves alone.

In practice, councils use Article 4 directions in conservation areas to remove householder rights that the designation does not reach: replacement windows and doors, painting, front boundary walls, satellite dishes, rooflights on front slopes, hard surfacing of front gardens. A direction is site-specific and its wording controls, so read the direction itself rather than a summary.

Where a direction removes rights, compensation is potentially available in defined circumstances, which we cover in compensation when an Article 4 direction removes rights.

There are also conservation area controls that have nothing to do with permitted development. Demolition of a building in a conservation area generally needs planning permission, works to trees need six weeks' notice to the council, and advertisement consent rules are tighter.

What this means for an application

If your scheme falls outside permitted development because of the designation, the application is usually straightforward and the argument is about design rather than principle. Two documents do the work.

A short Planning Statement setting out the scheme, the relevant local plan policies and how the design responds to the character of the area. And where the property is in a conservation area or affects a listed building or its setting, a Heritage Statement identifying what is special about the place and explaining the effect of the proposal on it. Councils in historic areas treat the absence of a heritage statement as a validation failure, so check the local validation list.

One honest uncertainty: conservation area boundaries and Article 4 directions are recorded inconsistently between authorities, and older directions in particular can be hard to find online. Ask for the direction document, not a summary of it, and keep the reply.

Enter your postcode on PlanScope to see which reports your site is likely to need.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. A lawful development certificate is the only formal way to confirm that works are lawful. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.