Backland Development
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Building in a large rear garden in Portsmouth

A home at the bottom of a Portsmouth garden is backland development: building on land behind existing houses that has little or no street frontage of its own. It differs from infill, where a home fills a gap in the street, and it gets a closer look because of privacy and access.

That closer look is why a free appraisal comes first. We check depth, levels, trees, drainage and the title, sketch a realistic layout and explain what Portsmouth City Council is likely to focus on. Then you decide whether to sell the land outright, sell it subject to planning, or have a new home built for you.

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Overhead view of three long, narrow back gardens with lawns, a greenhouse, vegetable beds and sheds
Planning authority
Portsmouth City Council
Postcodes
PO1, PO2, PO3, PO4, PO5
Noon sun, 21 March
About 39°
Shadow from a 5 m eaves line
About 6.1 m
Planning plan
Local Plan
County
Hampshire

How it plays out in Portsmouth

Access is where many garden schemes succeed or fail, in Portsmouth as anywhere. A drive squeezed past the side of a house has to be wide enough for cars, give drivers a clear view as they pull out, and keep noise and headlights from bothering the people next door. A new or wider dropped kerb also needs the highway authority’s consent.

Homes in PO1, PO2, PO3 and PO4 with a garage or a wide side passage often start ahead here. Where the gap is tight, a smaller home, a shared drive with a neighbour or access from a lane behind may still work. Because Portsmouth City Council will look closely at the detail, we design the access before the house.

Section showing noon sun and shadows in Portsmouth: 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 17.7 mExistingNew home
Noon sun in Portsmouth on 21 March sits about 39° above the horizon, so a typical two-storey eaves line (about 5 m) throws a shadow of roughly 6.1 m. In December the sun is only about 16° up and shadows stretch much further. Drawn for a garden facing north, where it matters most.

From first call to decision

Send us your address in Portsmouth and a rough idea of what you’d like. We check the planning history around you and the policies Portsmouth City Council applies, and look for anything in the title that could get in the way. If the garden passes those checks, we arrange a visit at a time that suits you and explain each route in plain terms.

  1. Free plot appraisal

    We look at your garden using maps, the title plan and the planning history around you, then talk it through with you. If it looks workable we arrange a site visit. There’s no cost and no obligation.

  2. Measure and test the layout

    We check depth, the width of the way in, levels, trees, drains and what lies behind, then sketch what could realistically fit: one home, two, or nothing worth pursuing, before anyone pays for an application.

  3. Choose your route

    You decide whether to sell the plot outright, sell subject to planning, grant an option, team up with neighbours, or keep the land and have us design, get planning for and build a home on it.

  4. Sale or build

    If you sell, your solicitor handles the transfer of part and your lender’s release of the plot. If you build, we give a written quote after design and survey, then build and hand over the new home.

Worth checking early

  • Neighbours are consulted and may object. The council decides, and a carefully designed scheme can still be refused.
  • Surveys and drawings cost money before any decision. On a subject-to-planning sale we normally fund them; on a build you do.
  • A covenant, a mortgage, a public sewer or a protected tree can slow a scheme down or stop it altogether.

Your questions, answered for Portsmouth

How long does planning take for a garden home in Portsmouth?

It varies. Small schemes often take a few months from submission to decision, and longer if surveys, amendments or extra consultation are needed. Pre-application advice and early surveys add time at the start but can save time later. We won’t promise a date, because the council sets the pace.

How do I find out if my Portsmouth garden is big enough for a house?

Ask for a free garden plot appraisal. We measure depth and the width of the way in, check what lies behind, look at levels, trees and drainage, and compare your garden with your council’s separation and garden-size guidance. Size alone rarely settles it, because access and neighbours’ privacy matter just as much.

Who decides planning for a home in a Portsmouth back garden?

Portsmouth City Council decides, using the council’s Local Plan, national policy and any local design guidance. It consults neighbours and other bodies before reaching a decision. We prepare the application and deal with the planning officer, but the outcome is always the council’s call.

Can I build a house in my back garden in Portsmouth?

Possibly, if the garden is deep enough, has a safe way in and a new home wouldn’t harm the neighbours or the character of the street. A new separate home always needs planning permission, and Portsmouth City Council makes the decision. A free appraisal will tell you whether your garden is worth taking further.

Other options in Portsmouth

Large rear gardens near Portsmouth

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