- Planning authority
- Plymouth City Council
- Postcodes
- PL1, PL2, PL3, PL4, PL5
- Noon sun, 21 March
- About 40°
- Shadow from a 5 m eaves line
- About 6.0 m
- Planning plan
- Local Plan
- County
- Devon
Before you decide in Plymouth
People living next door are consulted on every planning application, and across PL1, PL2, PL3 and PL4 that applies to a family annexe just as much as to a new house. Their privacy, outlook and light carry real weight with Plymouth City Council. A design that keeps upper windows away from adjoining gardens, uses obscure glazing where it has to, and leaves a planted margin along the boundary gives the council fewer reasons to refuse. A quiet word with the people either side before the application goes in is often worthwhile too.
How we’d take it forward in Plymouth
Here’s what happens next for a family home in Plymouth. You tell us about your plot and who the home is for, and we carry out a free desktop appraisal of access, space and the planning context. If it looks viable we visit, then set out the annexe and separate-home options. With your go-ahead we survey, design and give you a written quote, then prepare the application for Plymouth City Council.
Free plot appraisal
We look at your plot, access and the planning picture from the desk, talk through who will live in the new home, and visit if it looks viable. There’s no cost and no obligation.
Annexe or separate home
We set out both routes for your plot, covering what each means for planning, ownership, council tax, CIL and VAT, so you can decide with your family and advisers before design starts.
Survey and design
A measured survey, then a design built around the person moving in: step-free routes, a ground-floor bedroom if needed and privacy for both households. You get a written quote after design and survey.
Planning and approvals
We prepare and submit the planning application and manage it with the council, which makes the decision. Before work starts, approval under the Building Regulations is in place and any CIL exemption has been claimed.
Worth checking early
- CIL exemptions are lost if work starts before the claim is made, and can be withdrawn if the home is sold or let within three years.
- A separate home needs its own garden, parking, bins and access, so it needs more land than an annexe.
- VAT savings available on a separate dwelling often don’t apply to an annexe; take advice from a tax adviser before choosing.
Your questions, answered for Plymouth
Who owns an annexe built in my Plymouth garden?
You do. An annexe stays on the title of your house and usually carries a planning condition tying it to the main home, so it can’t be transferred to the relative living in it. If a family member is paying towards it, record what they’ve put in and what happens on a sale in a written agreement drawn up by a solicitor.
Do I need planning permission for a granny annexe in Plymouth?
Yes, almost always for a detached annexe with its own kitchen, bathroom and bedroom. Plymouth City Council will treat it as accommodation linked to your home and will usually add a condition so it can’t be let or sold separately. A garden building used only as a home office or gym is a different matter, but sleeping and cooking take it beyond those allowances.
How long will building work disrupt my home in Plymouth?
A single garden home usually takes several months on site, with the noisiest work, such as groundworks, drainage and heavy deliveries, concentrated near the start. We agree working hours, access and parking with you up front, and with the people next door where it affects them, so your household knows what each week will look like.
Will an annexe in Plymouth put up my council tax?
It might. Annexes can be banded separately, but exemptions exist for annexes lived in by certain dependent relatives, and in some cases a discount applies where family live there or the annexe is used as part of the main home. Who qualifies depends on the relative’s circumstances and how the annexe is used. Plymouth City Council’s council tax team can tell you how the rules apply to your household.
Other options in Plymouth
- Bungalows on large plots
- Sell subject to planning
- Planning promotion for your garden plot
- Sell part of your garden
- Garage courts and yards
- Joint venture on your garden plot

