Backland Development
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Build a new home in your garden in Llangefni

Building a second home behind your own in Llangefni is a construction project with one unusual feature: you live beside the site from the first spade to the last coat of paint. That shapes how we plan it, from the fence that separates your garden on day one to where deliveries park.

The route covers everything between an idea and a finished house. We survey and design, prepare and submit the planning application, arrange Building Regulations approval and the structural warranty, organise new water, drainage and electricity connections, and then build. You keep ownership of the land throughout.

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Timber-frame house under construction with scaffolding at the bottom of a back garden, seen from the patio
Planning authority
Isle of Anglesey County Council
Postcodes
LL77
Noon sun, 21 March
About 37°
Shadow from a 5 m eaves line
About 6.7 m
Planning plan
LDP
County
Gwynedd

How it plays out in Llangefni

Construction on a Llangefni garden plot runs to a programme agreed once Isle of Anglesey County Council has issued permission and any pre-commencement conditions have been dealt with. Groundworks and foundations come first; the shell and roof follow, then glazing, internal trades and, last of all, the drive and planting.

Weather matters. Around 21 December the sun in Llangefni climbs to only about 13° at midday, so winter days are short and wet ground slows the work. Where we can, we order the job so the house is weathertight before the worst months arrive.

Section showing noon sun and shadows in Llangefni: about 37 degrees on 21 March and 13 degrees on 21 December21 m21 Mar, noon: sun 37°, shadow 6.7 m21 Dec, noon: sun 13°, shadow 21.1 mExistingNew home
Noon sun in Llangefni on 21 March sits about 37° above the horizon, so a typical two-storey eaves line (about 5 m) throws a shadow of roughly 6.7 m. In December the sun is only about 13° up and shadows stretch much further. Drawn for a garden facing north, where it matters most.

The next steps, locally

If your Llangefni plot already has planning permission, we begin by checking the approved drawings and conditions against the site. Some permissions need detailed design, discharge of conditions or a minor amendment before they can be built. We then prepare the technical drawings, arrange Building Regulations approval and the warranty, apply for utility connections and give you a written quote to build.

  1. Free plot appraisal

    We check the title plan, access, constraints and planning policy from our desk, talk the plot through with you, and visit if it looks viable. There’s no cost and no obligation.

  2. Survey and design

    A measured survey records levels, boundaries, trees and neighbouring windows. We then design a layout and house that suit the plot, the street and your budget, and decide whether pre-application advice is worth seeking.

  3. Planning and approvals

    We submit the planning application and manage it to a decision, then deal with conditions, Building Regulations approval, the structural warranty, any build-over agreement and the new utility connections.

  4. Written quote and build

    Once design and survey are complete you get a written quote. The build runs in stages — access and groundworks, foundations, frame and roof, fit-out and external works — with inspections at each key point.

Worth checking early

  • Planning can be refused, and money spent on surveys, design and the application isn’t recovered if it is — which is why we start with an appraisal.
  • You fund the build and carry the cost risk; ground conditions, sewer diversions or supply upgrades found later can move the price.
  • A build next door means months of noise, deliveries and contractors near your home; good planning reduces the disruption but doesn’t remove it.

Your questions, answered for Llangefni

Can I build a house in my Llangefni garden and then sell it?

Yes. You keep the land while the home is built, then sell the finished house. Before building starts, the plot should be given its own title through a transfer of part at HM Land Registry, and if your house is mortgaged your lender must agree to release the plot. Selling a home you’ve built can change your tax position, so take advice from a tax adviser first.

Do new homes in Llangefni need a structural warranty?

If the house will ever be sold or mortgaged, in practice yes. Mortgage lenders usually expect a 10-year structural warranty on a new home, though some accept an architect’s or surveyor’s certificate, and a warranty provider inspects the work at stages during the build, so it has to be in place before construction starts. Building control approval is separate and also required; a buyer’s solicitor will ask for both.

Can the new home in my Llangefni garden connect to the main sewer?

Usually, yes, but the route and depth decide how easily. The new home needs its own foul connection, agreed with the water company, and gravity drainage is simplest where the sewer sits lower than the new floor. If it doesn’t, a pumped connection may be needed. Where a public sewer runs under your garden, a build-over agreement or diversion may also be required.

Will I pay Community Infrastructure Levy on a new home in Llangefni?

Only if Isle of Anglesey County Council has adopted a Community Infrastructure Levy charging schedule; not every council has. Where it applies, it can be charged on a new home of any size. A self-build exemption exists for people building a home to live in, but it must be claimed before work starts, so we check the position at design stage.

Other options in Llangefni

Build in your garden near Llangefni

Find out what your garden could become

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

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