A Crickhowell 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 CheckCrickhowell homeowners considering a granny annexe need to understand what actually changes the planning position, self-containment. An outbuilding used incidentally, for storage, a home office, or a hobby room, can be permitted development in Crickhowell, subject to height and coverage conditions.
Introduce a genuine bedroom, bathroom, and kitchen used independently of the main house, and that outbuilding stops being incidental, taking it outside permitted development regardless of size.
A mobile structure meeting the Caravan Sites Act 1968 definition offers a third route for Crickhowell annexes, but only where it genuinely remains ancillary to the household, not a separate residence in its own right. A Crickhowell annexe needing full planning permission usually needs both, our Building Regulations drawings in Crickhowell service covers the technical compliance side, and our structural calculations in Crickhowell 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 Crickhowell 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 Crickhowell 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 Crickhowell annexe projects is handled properly from the outset, informed by real experience with this kind of project.
We treat every Crickhowell annexe project as needing a genuinely honest assessment first, not a sales pitch toward the most expensive route.
Real experience with the Caravan Act, permitted development, and full application routes is what we bring to every Crickhowell project, not a one-size answer.
Structural and building regulations detail for Crickhowell annexes are handled properly from the outset, whichever route your project actually takes. 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 Crickhowell.
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, Crickhowell annexes meeting this can often avoid planning permission if they stay ancillary to the house.
Only if it stays genuinely incidental to the house, Crickhowell 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 Crickhowell 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 Crickhowell 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 Crickhowell annexe projects, the planning route, whichever applies, and building regulations compliance, as one coordinated service.