Backland Development
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Combine back gardens with your neighbours in Treharris

A shared access road is often what makes backland homes possible in Treharris. Instead of several narrow drives, one properly designed road with good visibility at the pavement can serve every new home on the combined land, keep cars further from existing windows and give bin lorries and emergency vehicles the room they need.

The household providing that access gives up the most, so an equalisation agreement usually gives them an extra agreed share. Every owner keeps their house and an agreed garden, and the planning application to Merthyr Tydfil County Borough Council covers the whole site at once rather than plot by plot.

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Aerial view of a row of semi-detached houses whose garden ends have been combined into one plot with a new access
Planning authority
Merthyr Tydfil County Borough Council
Postcodes
CF46
Noon sun, 21 March
About 38°
Shadow from a 5 m eaves line
About 6.3 m
Planning plan
LDP
County
Mid Glamorgan

Treharris: light, access and policy

A combined site in Treharris goes to Merthyr Tydfil County Borough Council as one application, judged against the council’s Local Development Plan (LDP) and national policy. The council will look at the scheme as a whole: whether one access is safe, whether the layout respects the pattern of the street and gardens around it, and whether every existing home keeps enough privacy, daylight and garden.

That’s a stronger position than several separate applications for single plots, each judged on its own and each with its own drive. It isn’t a guarantee, but it gives the council a scheme it can assess fairly.

Section showing noon sun and shadows in Treharris: 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 18.8 mExistingNew home
Noon sun in Treharris 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.

What happens next in Treharris

Nothing happens without every owner’s agreement. If you’re in Treharris and think the gardens on your side of the street could work together, call us or use the form. We’ll look at the land first, tell you plainly whether it’s worth pursuing, and only then discuss approaching the other owners, with your say-so and in the way you prefer.

  1. Free appraisal of the combined land

    We look at all the titles together, the possible access points, the surrounding homes and the planning policies that apply, then explain whether a combined scheme looks realistic and roughly what it might allow.

  2. Meet the neighbours

    We meet the owners together or separately, explain how the scheme and the routes work, and answer questions. We don’t approach your neighbours without your agreement, and nobody is committed at this stage.

  3. Collaboration agreement

    Each owner’s own solicitor reviews the documents, and everyone signs a collaboration agreement alongside the sale, option or promotion agreement. Mortgage lenders are asked to consent early, and the agreements are usually protected on each title.

  4. One planning application

    We prepare and submit a single application for the whole site, with one shared access and a layout designed around all the existing homes. The council decides it, and nobody can promise the result.

Worth checking early

  • Tax depends on each owner’s circumstances, so each should take advice from a tax adviser.
  • Several owners have to agree, so a combined scheme usually takes longer to set up than a single plot.
  • Every owner’s mortgage lender, title and covenants have to be dealt with, and one problem can hold up everyone.

Treharris: questions to ask

Will Merthyr Tydfil County Borough Council prefer a combined scheme to single plots in Treharris?

It often gives the council a better scheme to assess, with one proper access and more space between homes. But every application is judged on its merits against the council’s Local Development Plan (LDP), and the decision is the council’s. We test the layout against its policies before applying.

How many neighbours in Treharris need to take part?

As few as two can be enough. What matters is that the gardens taking part make a workable site and that one of them provides access to the road. We tell you which gardens are essential and which would simply improve the scheme.

Does each Treharris owner keep their own house and garden?

Yes. Each owner keeps their house and an agreed garden for it. Only the land behind is transferred, as a transfer of part at HM Land Registry. New boundaries and fencing for each house are agreed as part of the design.

Can neighbours in Treharris combine their back gardens for new homes?

Yes, where the gardens adjoin and there’s a workable access. Each owner keeps their house, the land behind is planned as one site, and a collaboration agreement sets out how the value is shared. Merthyr Tydfil County Borough Council decides any planning application on its merits.

Other options in Treharris

Combine neighbours’ gardens near Treharris

Find out what your garden could become

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