Holyhead, North Wales
Side return extension in Holyhead
Infilling the narrow passage beside a Victorian or Edwardian back addition. If you live in Holyhead and want to know what a side return extension would cost and whether it needs planning, start with the online guide price or a free site visit.
We cover Holyhead (LL65) as part of our North Wales work. Side returns suit the Victorian and Edwardian terraces found across parts of North Wales, where the kitchen sits in a narrow back addition.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a side return extension cost in Holyhead?
Guide prices for a side return extension in Holyhead start from our Wales rate of £2,140–£3,530 per square metre, including VAT. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £25,500–£42,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £37,500–£62,000 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a side return extension in Holyhead?
Planning for a side return extension in Holyhead follows the Welsh householder rules.
In Wales a single-storey side extension can be permitted development if it is no more than 4 metres high and the house ends up no more than 50% wider than the original. Many side return infills on terraced streets, and most wraparounds, go through a householder application.
The Party Wall etc. Act 1996 also applies in Wales: two months' notice for work to a shared wall and one month for foundations dug close to a neighbour's building.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Holyhead like to extend?
Older terraces near the centre and post-war semis further out are typical of Holyhead. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a side return extension in Holyhead comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Side return extensions near Holyhead
From Holyhead, the nearest places we also cover are Bangor (21.5 miles) and Llandudno (33.1 miles).
- Side return extension in Bangor
- Side return extension in Llandudno
- Side return extension in Colwyn Bay
- Side return extension in Abergele
- Side return extension in Rhyl
Other work in Holyhead:
FAQ
Side return extension questions in Holyhead
Can you match the brick or stone on my Holyhead house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do I need planning permission for a rear extension in Holyhead?
Often not for a single-storey rear extension of up to 4 metres under Welsh permitted development. Wales has no prior approval route for deeper extensions.
Where does the drainage go?
Side passages often carry the soil and rainwater pipes. We survey them first and reroute them under the new floor where needed.
How much does a side return extension cost in Holyhead?
As a guide, £2,140–£3,530 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £25,500–£42,500 at that rate. Your written price follows the survey.
Is the site visit in Holyhead free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do I need a party wall agreement?
In Wales, usually yes if the extension is on or near a shared boundary or close to a neighbour's foundations. We serve the notices.