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House Extensions in Morley: What a Single Storey Extension Involves

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28 September 2026 · 3 min read

Timber roof joists installed over a single-storey extension in Morley
CLM project photo: roof structure taking shape on a single-storey extension in Morley.

If you are searching for house extensions in Morley, you are probably weighing up whether a single storey extension can give you the extra room you need, and what the process actually looks like from first thought to finished space. Here is a straight answer before we say anything about ourselves.

Most single storey extensions in Morley fall into a few familiar shapes: a rear extension to open up a kitchen or dining space, a side return to claim the dead space down the side of the house, or a wrap-around that does both. Which one suits you depends on your plot, the position of your boundaries, and how you actually want to live in the space once it is done.

Do you need planning permission?

Many single storey rear extensions fall under permitted development, which means you may not need full planning permission. But that is not a guarantee. It depends on how far you are extending, the height, how close you are to boundaries, and whether your property has had permitted development rights removed, which happens more often than people expect on certain streets and in conservation areas. Even under permitted development you will likely need a Lawful Development Certificate, and the work still has to meet Building Regulations. If your extension sits near a shared boundary, the Party Wall Act may also come into play with your neighbours. It is worth checking all of this early rather than assuming.

What the build actually involves

A single storey extension is more than four new walls. In rough order, you are looking at:

  • Foundations sized to the ground and the load. Morley sits on a mix of ground, and what you dig depends on the soil, nearby trees, and drainage runs. There is no single depth that fits every plot, which is why a proper site look matters.
  • Drainage. If your extension sits over or near existing drains, they may need diverting or building over with agreement from the water authority.
  • The structural opening. Where you knock through to the existing house, that usually means a steel beam sized to carry the load above, with proper bearings.
  • The building envelope: walls, roof, insulation, windows and doors, all to current regulations.
  • First fix and second fix: electrics, plumbing, heating, then plaster, flooring and decoration.

What moves the price

There is no honest way to quote an extension without seeing it, and anyone who gives you a firm figure over the phone is guessing. The things that genuinely move the cost are:

  • Access. Can materials and muck get in and out easily, or is everything going through the house?
  • Ground conditions. Soft ground, made ground or nearby trees mean deeper or wider foundations.
  • Drainage and levels. Diverting drains or working with a sloping plot adds work.
  • The opening into the house. A wider span needs a bigger steel and more structural work.
  • The specification. Bifold doors, a lantern roof, underfloor heating and a full kitchen fit-out cost more than a plainer finish.

Because of all that, the sensible route is a look at the actual job, then a written quote you can rely on.

A word on finishes

An extension is only as good as the details inside it. We do a lot of full internal fit-out too, from kitchens through to bathrooms with tiled walls, glass screens and thermostatic showers, so the new space is finished properly rather than left as a shell for someone else to sort out.

We work across Morley and the wider Leeds area, from Rothwell and Horsforth to Wetherby. If you are thinking about a single storey extension and want a clear idea of what your plot allows and what it would take, get in touch for a quote and we will come and look at the job properly.

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