Can I build a granny annexe in St Helens 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 St Helens, but a self-contained annexe with its own facilities used independently usually can’t.
Can my St Helens annexe qualify as a mobile home?
Yes, potentially, if your St Helens 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 St Helens?
Class E permitted development in St Helens 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 St Helens annexe need full planning permission?
Once a St Helens 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 St Helens annexe?
Yes, this is genuinely worth having for St Helens 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 St Helens properties?
Absolutely, St Helens annexe clients get the planning classification and building regulations detail handled together, not as separate, disconnected pieces of work.
