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Celtic Offsite

Celtic Offsite is a leading manufacturer of high-quality, sustainable timber frame homes, featuring factory-fitted insulation and windows.

From our factory in Caerphilly, we deliver excellent housing solutions that benefit the people, environment and economy of Wales. We are recognised as an industry leader for continuously improving how homes are built and supplied here.

As a social enterprise within the United Welsh Group, our profits are reinvested into building more affordable homes and decarbonising existing homes in Wales.

Where to find us

Pontygwindy Industrial Estate, Caerphilly, South Wales, CF83 3HY

Get in touch

029 2085 8128

Book a factory tour

See how we can support your organisation

Our work

An external image of Acer House, a United Welsh development in Brynmawr. The top floor of the building is a cream render, and the bottom half is a light brown brick.

Location: Brynmawr, Blaenau Gwent
Number of homes: Five apartments
Homes available: Supported housing with individual, specialist support
Working with United Welsh, Aneurin Bevan Health Boar and Blaenau Gwent Council

Wingfield Crescent, phase two

Location: Llanbradach, Caerphilly
Number of homes: 23
Homes available: Affordable rent and LCHO
Working with United Welsh and Caerphilly County Borough Council

A computer generated image of five new bungalows on the site of the former Nelson Ambulance Station.

Former Nelson Ambulance Station

Location: Treharris, Caerphilly
Number of homes: Five
Homes available: Affordable rent
Working with United Welsh and Caerphilly County Borough Council

Image of 3 houses being built at Austin Grange development

Location: Caerphilly town centre
Number of homes: 75
Homes available: Affordable rent, homes for older people and LCHO
Working with United Welsh and Caerphilly County Borough Council

An external image of United Welsh's new development in St Mellons. The outside of the building is a cream colour, with a curved front entrance area.

Location: Cardiff
Number of homes: 18
Homes available: Short-term family homes for people experiencing homelessness
Working with United Welsh and Cardiff Council

House in Church Road at Llanishen, Chepstow.

Location: Llanishen, Chepstow
Number of homes: Eight
Homes available: Affordable rent
Working with Melin Homes and Monmouthshire County Council

Location: Croespenmaen, Crumlin
Number of homes: 60
Working with Pobl Group and Caerphilly County Borough Council

Photograph of Cwrt Y Rhos develpment. In the centre of the image are timber frame structures for the new homes. To the left of the image is a blue crane.

Location: Caerphilly
Number of homes: 31
Homes available: Affordable rent with Caerphilly County Borough Council
Working with United Welsh and Caerphilly County Borough Council

CGI of the 10 affordable homes to be built at the Button Factory in Porth.

Former Button Factory

Location: Porth, Rhondda Cynon Taf
Number of homes: 10
Working with Trivallis Rhondda Cynon Taf County Borough Council

CGI of bungalow that Celtic Offsite is helping to build for Newydd Housing Association.

Location: Aberdare, Rhondda Cynon Taf
Number of homes: 17
Working with Newydd Housing Association and Rhondda Cynon Taf County Borough Council

Sustainability

Timber is considered to be the most sustainable building material with the lowest embodied carbon
We have been certified as a Climate Positive Business by Earthly, and have removed 134.65 tonnes of carbon since 2021
We work with Carbon Footprint Ltd to continue to offset our carbon production by planting one tree for every tonne we produce

View our certificates

Earthly certificate

ISO9001 certificate

ISO45001 certificate

ISO14001 certificate

STA certificate of membership

PEFC certificate

Carbon Footprint Ltd certificate

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