Help With Planning
Caravan Act, PD & Full Planning Explained

Granny Annexe Planning Permission in
Thatcham

Introducing sleeping accommodation into a Thatcham outbuilding changes its planning status entirely, from incidental permitted development to something that almost always needs a full application. We assess your specific project honestly.

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Local to Thatcham
Three Routes Explained
Council-Ready Applications

Granny Annexe Planning Explained For Thatcham

Three routes exist for a Thatcham granny annexe, and which one applies depends on genuine facts about the structure, not assumptions. The Caravan Sites Act 1968 defines a caravan by size, 20 metres by 6.8 metres, 3.05 metres internal height, and mobility, capable of being moved by road in one or two sections.

Class E permitted development covers incidental outbuildings in Thatcham, but excludes anything used as separate, self-contained living accommodation, the introduction of sleeping facilities used independently changes everything.

Where your Thatcham annexe doesn’t fit either of the simpler routes, a full planning application is the honest answer, and we confirm this properly rather than guess. A Thatcham annexe needing full planning permission usually needs both, our Building Regulations drawings in Thatcham service covers the technical compliance side, and our structural calculations in Thatcham 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 Thatcham

Every Thatcham 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 Thatcham 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 Thatcham annexe projects, whichever route applies.

Getting The Route Right For Your Thatcham Annexe

Getting the classification right for a Thatcham annexe, mobile, incidental, or self-contained, matters as much as the design itself, and we treat both with equal seriousness.

Every Thatcham annexe project gets an honest assessment against all three routes, not a default assumption that the most complex one applies.

We coordinate structural and building regulations work for Thatcham annexes properly, since getting this wrong can hold up an otherwise straightforward project. 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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What Thatcham Families Ask About Garden Annexes

Can I build a granny annexe in Thatcham without planning permission?

Not automatically, a mobile structure meeting the Caravan Act’s size and mobility test, or a genuinely incidental outbuilding, can potentially avoid it in Thatcham, but a self-contained annexe with its own facilities used independently usually can’t.

Can my Thatcham annexe qualify as a mobile home?

Yes, potentially, if your Thatcham 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.

Does Class E cover a granny annexe in Thatcham?

Class E permitted development in Thatcham 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.

When does my Thatcham annexe need full planning permission?

Once a Thatcham 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.

Should I get written confirmation for a Thatcham annexe?

Yes, this is genuinely worth having for Thatcham projects, confirming the position in writing protects you if the classification is ever questioned, especially at the point of sale.

Do you coordinate the full annexe process for Thatcham properties?

Absolutely, Thatcham annexe clients get the planning classification and building regulations detail handled together, not as separate, disconnected pieces of work.