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Caravan Act, PD & Full Planning Explained

Granny Annexe Planning Permission in
Trumpington

Not every annexe in Trumpington 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 Trumpington project actually is.

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Local to Trumpington
Three Routes Explained
Council-Ready Applications

The Trumpington Granny Annexe Planning Position

Trumpington 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 Trumpington, 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 Trumpington annexes, but only where it genuinely remains ancillary to the household, not a separate residence in its own right.

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 Trumpington

Every Trumpington annexe enquiry starts with the same honest question, mobile caravan, incidental outbuilding, or genuine separate dwelling, since the answer determines everything that follows.

From there, we confirm the correct route for your Trumpington project and prepare exactly what’s needed, a Lawful Development Certificate or a full planning application.

Structural detail and building regulations compliance for Trumpington annexes are handled properly throughout, not bolted on at the end.

Honest Annexe Advice For Trumpington

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

Structural and building regulations detail for Trumpington 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 Trumpington

What determines if my Trumpington annexe needs planning permission?

This genuinely depends on your specific plans for Trumpington, 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 Trumpington?

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 Trumpington plans genuinely meet this.

What outbuilding rules apply to a Trumpington annexe?

It depends on genuine use, an incidental Trumpington 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 Trumpington?

Genuine independence is the test in Trumpington, 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 Trumpington?

Strongly recommended for Trumpington 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 Trumpington annexe project?

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