Two-storey extensions in Caernarfon
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Caernarfon.
Caernarfon at a glance
- Postcode districts
- LL54, LL55 and LL61
- Area
- Gwynedd and Anglesey, Wales
- Price region
- Wales
- Nearest towns
- Menai Bridge (7.3 miles), Llangefni (8.1 miles), Bangor (Gwynedd and Anglesey) (8.3 miles), Bethesda (9.2 miles)
- Distance to Bangor (Gwynedd and Anglesey)
- about 8.3 miles
- Approvals
- Two-storey rear: ground floor up to 4 m, first floor up to 3 m and 10.5 m from the rear boundary. Some two-storey side extensions can be permitted development.
We cover postcode districts LL54, LL55 and LL61 in and around Caernarfon, along with neighbouring Menai Bridge, Llangefni and Bangor (Gwynedd and Anglesey).
Extensions available in Caernarfon
Two-storey rear extensions
Caernarfon guide price from £51,500, Standard spec.
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Two-storey side extensions
Our Wales guide starts at £79,000 for this type.
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Two-storey wraparound extensions
Design, approvals and build for Caernarfon homes. Guide from £111,000.
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Part single, part two-storey extensions
Design, approvals and build for Caernarfon homes. Guide from £66,000.
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Extensions over a garage
Caernarfon guide price from £29,000, Standard spec.
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First-floor extensions
For homes in Caernarfon: typical guide from £23,000.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Caernarfon homes. Guide from £51,500.
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Two-storey extensions for detached houses
Caernarfon guide price from £79,000, Standard spec.
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Kitchen extensions with bedrooms above
Design, approvals and build for Caernarfon homes. Guide from £51,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Caernarfon: typical guide from £51,500 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Caernarfon depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in Gwynedd and Anglesey
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Caernarfon
Caernarfon is in Wales. Two-storey rear: ground floor up to 4 m, first floor up to 3 m and 10.5 m from the rear boundary. Some two-storey side extensions can be permitted development. Householder planning application: £585. Councils normally decide householder applications within 8 weeks.
The full Wales rules explained
Questions about extensions in Caernarfon
Do you cover Caernarfon?
Yes. We cover Caernarfon (LL54, LL55 and LL61) and the surrounding area, including Menai Bridge and Llangefni. The first site visit is free.
What does a two-storey extension cost in Caernarfon?
Using our Wales guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £51,500–£69,500 including VAT. An extension over a garage is about £29,000–£42,000.
Which other places near Caernarfon do you cover?
Everywhere around it, including Menai Bridge (7.3 miles), Llangefni (8.1 miles) and Bangor (Gwynedd and Anglesey) (8.3 miles), and the rest of Gwynedd and Anglesey.