Willenhall families often assume a granny annexe automatically needs full planning permission, in reality a structure that qualifies as a caravan under the 1968 Act, or a genuinely incidental outbuilding, can sometimes avoid that route entirely. We establish which applies to your specific Willenhall project.
Get Your Free Route CheckA granny annexe in Willenhall can follow three genuinely different routes. A structure that meets the legal definition of a caravan under the Caravan Sites Act 1968, capable of being moved by road in one or two sections and within maximum dimensions of 20 metres by 6.8 metres with an internal height of 3.05 metres, can often be sited without planning permission provided it remains ancillary to the house.
An outbuilding used incidentally to the enjoyment of the house, a home office, gym, or storage, can fall under Class E permitted development, but the moment it includes genuine sleeping accommodation used independently, it’s no longer considered incidental, and permitted development stops applying.
Where neither route fits, a full planning application is the reality for Willenhall properties, and we confirm this honestly rather than assume. A Willenhall annexe needing full planning permission usually needs both, our Building Regulations drawings in Willenhall service covers the technical compliance side, and our structural calculations in Willenhall 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 begin every Willenhall annexe project with an honest assessment of the actual plans, size, mobility, and intended use, before any design work begins.
Where the Caravan Act or permitted development genuinely applies to your Willenhall project, we confirm that properly, usually via a Lawful Development Certificate, rather than defaulting to a full application that isn’t needed.
Where genuine self-containment means a full application is required, we build that around what Willenhall’s council specifically expects to see.
We tell Willenhall families honestly whether their annexe genuinely qualifies for the Caravan Act or permitted development routes, rather than defaulting every enquiry to a full application.
Getting the self-containment question right matters more than almost anything else for a Willenhall annexe, and we assess this honestly rather than assume either way.
Structural and building regulations detail is built into every Willenhall annexe project from the start, whichever planning route applies. If you need help with a granny annexe, give us a call on 0330 133 5316 or fill in the form below.
Not automatically, a mobile structure meeting the Caravan Act’s size and mobility test, or a genuinely incidental outbuilding, can potentially avoid it in Willenhall, but a self-contained annexe with its own facilities used independently usually can’t.
Yes, potentially, if your Willenhall annexe meets the legal size limits, 20 metres by 6.8 metres by 3.05 metres internal height, and is genuinely capable of being moved by road, it may qualify as a caravan under the 1968 Act.
Class E permitted development in Willenhall covers incidental structures like a home office or gym, subject to height and coverage limits, but not genuine independent living accommodation with its own bedroom, bathroom, and kitchen.
Once a Willenhall structure functions as independent living space, its own facilities, used separately from the household, it’s no longer incidental, and neither permitted development nor the Caravan Act route typically applies.
Yes, this is genuinely worth having for Willenhall projects, confirming the position in writing protects you if the classification is ever questioned, especially at the point of sale.
Absolutely, Willenhall annexe clients get the planning classification and building regulations detail handled together, not as separate, disconnected pieces of work.