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

If you have a long or wide garden in Westminster, 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.

Westminster City 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
Westminster City Council
Postcodes
NW8, SW1X, W1H, W1M, W2
Noon sun, 21 March
About 38°
Shadow from a 5 m eaves line
About 6.3 m
Planning plan
Local Plan
County
Greater London

Westminster: light, access and policy

Access usually decides what a Westminster garden can take. An annexe can often share your drive because it is used with the house, but a separate home needs an access Westminster City Council will accept for a dwelling in its own right, with room for cars, bin collection and emergency vehicles. We cover homes in Westminster and around Kensington and Chelsea, Camden and Hammersmith and Fulham, and on every plot we measure the drive width, the view along the road where the access joins it, and how far bins would need to travel, before anyone draws a plan.

Section showing noon sun and shadows in Westminster: about 38 degrees on 21 March and 15 degrees on 21 December21 m21 Mar, noon: sun 38°, shadow 6.3 m21 Dec, noon: sun 15°, shadow 18.6 mExistingNew home
Noon sun in Westminster on 21 March sits about 38° above the horizon, so a typical two-storey eaves line (about 5 m) throws a shadow of roughly 6.3 m. In December the sun is only about 15° up and shadows stretch much further. Drawn for a garden facing north, where it matters most.

How we’d take it forward in Westminster

Here’s what happens next for a family home in Westminster. 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 Westminster City Council.

  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

  • 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.
  • Family plans change: agree ownership, costs and what happens if circumstances change in writing, with a solicitor.

Westminster: questions to ask

How long will building work disrupt my home in Westminster?

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.

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

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

Can I reclaim VAT on a family annexe in Westminster?

Often not. HMRC’s guidance gives an annexe that can’t be used or sold separately from the main house as an example of work that can’t be zero-rated, and the DIY housebuilders refund scheme asks the same question. A separate dwelling is usually treated differently. Take advice from a tax adviser before you settle the planning route, because the wording of the permission matters.

Is CIL payable on a family home in Westminster?

Only if Westminster City Council has adopted the Community Infrastructure Levy, which its website will confirm, and we check it for you during the appraisal. Where it applies, self-build and residential annexe exemptions exist, but both must be claimed before work starts and can be withdrawn if the home is sold or let within three years of completion.

Other options in Westminster

Family home in your garden near Westminster

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