Permitted Development – Page 10
GPDO classes, limits, conditions, prior approval and Article 4 directions explained.
Permitted Development articles – page 10
279 articlesPart 7 Class M: extensions at schools and colleges
School extension permitted development is capped at the lesser of 25 per cent of original floorspace and 100 square metres, with a 5 metre height limit and an absolute rule on parking and turning.
Part 6 Class B: agricultural units under five hectares
On a holding between 0.4 and 5 hectares, permitted development covers extensions, plant, private ways and hard surfaces. It does not cover a new building.
Part 6 Class A: agricultural buildings on larger units
Class A of Part 6 allows agricultural buildings on holdings of 5 hectares or more, within a 1,000 square metre ground area limit and a 12 metre height cap, after a prior approval notification.
Part 2 Class B: forming an access to a highway
Class B of Part 2 is a supporting right, not a standalone one. The road must be unclassified and the access must serve development permitted elsewhere in the Order.
Part 2 Class A: fences, walls and the one metre limit
Class A of Part 2 permits gates, fences and walls up to one metre next to a road and two metres elsewhere. The distinctions that decide whether your boundary needs permission.
Class G flues for biomass and heat network systems
A flue on a house is usually permitted development if it stays within a metre of the highest part of the roof. The limits, the protected land exclusions and the Building Regulations that run alongside.
Class F hard surfaces and front garden drainage
The front garden condition, not the area, is what decides whether a driveway needs permission. Falls towards the pavement are the usual failure.
Class E outbuildings and the 50 per cent curtilage rule
Class E permits incidental outbuildings, but every structure other than the original house counts towards the 50 per cent limit. Here is how to calculate it.
Class D porches: the three square metre limit
A Class D porch is limited to 3 square metres externally, 3 metres in height and 2 metres from a highway boundary. Miss one and permission is needed.
Class C rooflights and the 150 millimetre rule
150 millimetres is less generous than it sounds once the upstand, frame and flashing kit are added. The measurement is perpendicular to the original roof surface, not vertical.
Class B roof enlargement and the volume allowances
The Class B allowance is the whole question for most loft conversions. Earlier dormers count against it, end terraces get 40 rather than 50, and volume is measured externally.
Class AA: adding a storey to a house
Class AA is narrower than it looks. Construction date, height relative to neighbours and the prior approval matters rule out most houses before design begins.
Class A rear extension depth limits by house type
Four metres for a detached house, three for everything else, measured from the original rear wall. The other limits that catch people out are eaves height and the wrap-around.
Extending a shop under permitted development: Part 7 limits
The shops class in Part 7 of the GPDO 2015 allows a small rear extension without permission, but the boundary rule defeats most town centre units. Here is how the limits are measured and where the right falls away.
Part 7 Class H: extending an industrial building or warehouse
Class H permits industrial and warehouse extensions without an application, inside cumulative floorspace, height and boundary limits. The parking condition and the meaning of the original building defeat more schemes than the headline figures.
Part 4 Class A: site huts and temporary construction buildings
Site compounds are permitted development under Part 4 Class A of the GPDO, but only while the operations run, only on the site or land sharing a boundary, and only once the operations have permission.
Article 2(3) land: permitted development in protected areas
Article 2(3) land is the GPDO's shorthand for five designations that cut householder permitted development. Here is what is removed, what survives and how it differs from Article 4.
Why flats and maisonettes have no Part 1 permitted development
Permitted development for flats is far narrower than for houses, because Part 1 of the GPDO applies only to a dwellinghouse. Here is what that leaves, and where Part 20 helps.
EV charge points under Part 2 Classes D and E
Most home EV chargers do not need planning permission, because Classes D and E of Part 2 of the GPDO cover them. The limits that catch people out are the 2 metre highway rule and listed building curtilage.
Class MA prior approval: the use history and natural light tests
Two things sink most Class MA notifications: an unproven qualifying use history and habitable rooms without adequate natural light. Both are fixable before you apply.
The original dwellinghouse: how past extensions use up your allowance
Every householder permitted development limit is measured from the original house, not the house you own today. Extensions built by previous owners, with or without permission, still count.
What counts as curtilage and why it decides your rights
Permitted development rights for a house apply within its curtilage. That word is not defined in the GPDO, and where the line falls decides whether an outbuilding is lawful or not.
Prior approval and the 56 day rule explained
Development can begin 56 days after a valid prior approval application if the council has not notified a decision. The word doing the work in that sentence is valid.
Part 20 upward extensions: adding storeys by prior approval
Part 20 contains five upward extension classes with different storey allowances, height caps and date tests. Picking the wrong class is the usual reason a notification fails.
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