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Caravan Act, PD & Full Planning Explained

Granny Annexe Planning Permission in
Corsham (Wiltshire)

Not every annexe in Corsham follows the same planning route. A mobile, two-section structure within strict size limits can qualify under the Caravan Sites Act, while a permanent, self-contained living space with its own bedroom and kitchen almost always needs full planning permission. We work out which one your Corsham project actually is.

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Local to Corsham (Wiltshire)
Three Routes Explained
Council-Ready Applications

The Three Routes For A Corsham Granny Annexe

Corsham 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 Corsham, 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 Corsham annexes, but only where it genuinely remains ancillary to the household, not a separate residence in its own right. A Corsham annexe needing full planning permission usually needs both, our Building Regulations drawings in Corsham service covers the technical compliance side, and our structural calculations in Corsham service covers the engineering detail.

Right Route Confirmed

Caravan Act, permitted development, or full planning

Caravan Act Route

Movable structures that may need no permission at all

PD Size & Siting

Permitted development limits checked properly

Council-Ready

Applications built to be approved

Granny annexe planning permission

How We Help in Corsham (Wiltshire)

Every Corsham annexe enquiry starts with establishing the real facts, is the structure genuinely mobile within Caravan Act limits, is it staying incidental to the house, or is it a self-contained dwelling, since that shapes the whole route.

From there, we prepare exactly what your Corsham project needs, whether that’s a Lawful Development Certificate confirming caravan or permitted development status, or a full planning application.

Structural and building regulations input runs alongside the planning process for Corsham annexe projects, whichever route applies.

The Real Requirements For Corsham Granny Annexes

We treat every Corsham 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 Corsham project, not a one-size answer.

Structural and building regulations detail for Corsham 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.

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Common Annexe Planning Questions in Corsham

What determines if my Corsham annexe needs planning permission?

This genuinely depends on your specific plans for Corsham, we check whether the structure is mobile, incidental, or self-contained before advising either way.

What size limits apply to a caravan-style annexe in Corsham?

The Caravan Sites Act 1968 sets the limits, 20 metres long, 6.8 metres wide, 3.05 metres internal height, and the structure must be moveable by road in one or two sections, we check whether your Corsham plans genuinely meet this.

What outbuilding rules apply to a Corsham annexe?

It depends on genuine use, an incidental Corsham outbuilding can qualify under Class E, but introducing real sleeping accommodation used independently takes it outside permitted development regardless of size.

What makes an annexe a separate dwelling in Corsham?

Genuine independence is the test in Corsham, if the annexe could function as a separate home on its own, full planning permission is almost always the realistic route.

Is a Lawful Development Certificate worth it in Corsham?

Strongly recommended for Corsham annexes, an assumption that a structure qualifies isn’t the same as formal confirmation, and a Lawful Development Certificate closes that gap.

Can you manage everything for my Corsham annexe project?

Yes, we coordinate every part of a Corsham annexe project, from establishing the correct route through to building regulations sign-off, so nothing falls through the gap.