A Abergavenny annexe built to qualify as a caravan under the 1968 Act, moveable in one or two sections within strict size limits, can sometimes avoid planning permission altogether, provided it stays genuinely ancillary to the house. We confirm whether that route fits your plans.
Get Your Free Route CheckThe planning position for a Abergavenny annexe comes down to two questions, is it genuinely mobile within the Caravan Act’s size limits, and is it genuinely ancillary to the house rather than a separate, independent dwelling.
A structure meeting the caravan definition, movable by road, built in no more than two sections, within 20 metres by 6.8 metres by 3.05 metres internal height, can often be sited in a Abergavenny garden without full planning permission, provided it stays ancillary.
Where a Abergavenny annexe is permanently fixed, or genuinely self-contained with its own facilities used independently, the caravan and permitted development routes generally don’t apply, and a full application becomes the realistic path. A Abergavenny annexe needing full planning permission usually needs both, our Building Regulations drawings in Abergavenny service covers the technical compliance side, and our structural calculations in Abergavenny service covers the engineering detail.
Caravan Act, permitted development, or full planning
Movable structures that may need no permission at all
Permitted development limits checked properly
Applications built to be approved
We start every Abergavenny annexe project by establishing the real starting point, a mobile structure within Caravan Act limits, an incidental outbuilding, or genuine independent living space, since that single distinction shapes everything that follows.
Your Abergavenny application or certificate, whichever applies, is built around what your local council specifically expects to see, not a generic template.
Structural and building regulations work for Abergavenny annexe projects is handled properly from the outset, informed by real experience with this kind of project.
Honesty about what your Abergavenny annexe actually needs comes before any recommendation, not after we’ve quoted for the more expensive route.
We understand the genuine legal distinction between incidental and self-contained use for Abergavenny annexe projects, which is exactly what most generic guidance gets wrong.
A Lawful Development Certificate, where your Abergavenny annexe genuinely qualifies for it, gives you written confirmation rather than a risky assumption. If you need help with a granny annexe, give us a call on 0330 133 5316 or fill in the form below.
It depends on three things, whether the structure genuinely qualifies as a caravan under the Caravan Sites Act, whether it stays incidental to the house under permitted development, or whether it’s a self-contained dwelling, which almost always needs a full application in Abergavenny.
Under the Caravan Sites Act 1968, a structure qualifies as a caravan if it’s capable of being moved by road in no more than two sections, and doesn’t exceed 20 metres in length, 6.8 metres in width, or 3.05 metres in internal height, Abergavenny annexes meeting this can often avoid planning permission if they stay ancillary to the house.
Only if it stays genuinely incidental to the house, Abergavenny outbuildings under Class E permitted development cannot be separate, self-contained living accommodation, the moment sleeping facilities are used independently, permitted development stops applying.
A Abergavenny annexe with its own bedroom, bathroom, and kitchen, used independently of the main house rather than as shared accommodation, is generally treated as self-contained, which usually means full planning permission is needed.
We recommend it, even where your Abergavenny annexe genuinely qualifies as a caravan or permitted development, a Lawful Development Certificate gives you written confirmation rather than an assumption that could cause problems later, particularly when selling.
Yes, we handle the full picture for Abergavenny annexe projects, the planning route, whichever applies, and building regulations compliance, as one coordinated service.