Backland Development
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Build a home for family in your garden in Weymouth

If you have a long or wide garden in Weymouth, there may be room for a home where a parent or grown-up child can live close by with their own front door. That might mean an annexe used with your house, or a home that stands alone with permission and paperwork of its own.

Dorset Council decides either way, so the first step is to find out what your plot can realistically carry. Our free plot appraisal covers access, space, privacy and the main planning constraints, and talks through who the home is for, before you spend any money on drawings.

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Single-storey garden home with wide glazed doors and a covered porch at the back of a family garden
Planning authority
Dorset Council
Postcodes
DT3, DT4
Noon sun, 21 March
About 39°
Shadow from a 5 m eaves line
About 6.1 m
Planning plan
Local Plan
County
Dorset

How it plays out in Weymouth

Dorset Council will judge a family home against the council’s Local Plan and any guidance it has adopted on garden development and annexes. Some councils spell out how closely an annexe must relate to the main house, such as sharing the drive, garden or parking, and what turns a building into a separate home instead. We read the current policies for your address before design starts, because a scheme drawn to suit the wrong test wastes time and money. Where the position is unclear, the council’s pre-application advice can be worth its fee.

Section showing noon sun and shadows in Weymouth: about 39 degrees on 21 March and 16 degrees on 21 December21 m21 Mar, noon: sun 39°, shadow 6.1 m21 Dec, noon: sun 16°, shadow 17.5 mExistingNew home
This section is worked out for the latitude of Weymouth: around 39° of sun at midday in late March and about 16° at midwinter. It shows why the gap between your house and a new home behind it is about light as well as privacy. Garden assumed to face north.

How we’d take it forward in Weymouth

From first call to keys, a family home in Weymouth follows a clear order. Free appraisal and site visit; measured survey and design around the person moving in; a planning application to Dorset Council; approval under the Building Regulations and any CIL exemption claimed before work starts; then the build, with you living next door throughout. You receive a written quote after design and survey, and we keep the household updated at each stage.

  1. 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.

  2. 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.

  3. 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.

  4. Build and handover

    We build while you carry on living next door, with access, deliveries and working hours agreed up front. At handover you get the completion certificate and the paperwork you’ll need for council tax, lenders and any VAT claim.

Worth checking early

  • Family plans change: agree ownership, costs and what happens if circumstances change in writing, with a solicitor.
  • 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.
  • Planning is the council’s decision, and an annexe is not a way round the rules that apply to a new house.

Your questions, answered for Weymouth

Can I build a separate house in my Weymouth garden for my son or daughter?

Possibly, if the plot can work as a home in its own right. Dorset Council will look at access, parking, garden space for both houses, privacy and the character of the street, as it would for any new house. If permission is granted, the plot can be transferred to your child with its own title, with your lender’s consent if the house is mortgaged.

Do I need planning permission for a granny annexe in Weymouth?

Yes, almost always for a detached annexe with its own kitchen, bathroom and bedroom. Dorset 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.

Who owns an annexe built in my Weymouth 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.

How much garden do I need for a family home in Weymouth?

There’s no fixed figure. A single-storey annexe close to the house can work on a smaller plot than a separate dwelling, which needs its own garden, parking and access. What matters is whether Dorset Council can be satisfied on privacy, daylight and the space left for both homes. The free appraisal gives you a first view based on your plot’s actual shape and access.

Other options in Weymouth

Family home in your garden near Weymouth

Find out what your garden could become

Free garden plot appraisal. No cost, no obligation, and a straight answer if it won’t work.

Get my free appraisal 0800 088 6248