Serving customers throughout the South West

Mill Hill Quarries Ltd logo

Established for over 50 years, Mill Hill Quarries Ltd are one of the South West's leading slate quarrying companies.

The South West's slate quarrying specialists

Providers of high quality materials in Devon, Cornwall and the South West

At Mill Hill Quarries Ltd we specialise in the supply of cornish roofing slate, building stone, garden products, slate flooring, slate chippings, and other quarry products to the domestic, construction and landscaping industry.

The construction industry's choice

Mill Hill Slate Quarries extract stone from the Upper Devonian Slate Beds to produce high quality, hand selected materials for use throughout the construction industry.

Aggregates and slate chippings are generated from offcuts making them a more sustainable and environmentally responsible choice.

Mill Hill and Trevillett slate building stones and floor tiles are dense, durable and versatile, for use in interior or exterior applications, they are available in blue, rustic or cutface finishes.

Cornish roofing slate is hand split by craftsmen at our Trevillett quarry near Tintagel, Cornwall, and extensively used in heritage repair projects and quality new builds.

Our Trevillett roofing slate is quarried from the Upper Delabole Slate Beds and is available in a wide range of sizes, including locally popular diminishing course randoms.

Blue slate chippings

We give professional advice, we offer free quotes and DIY customers are welcome. Prompt deliveries can be arranged throughout the UK. Domestic and commercial enquiries are welcome.

Mill Hill Quarry

Mon - Fri:  0800 - 1700

Sat - Sun:  Closed

Trevillett Quarry

Mon - Fri:  0800 - 1630

Sat - Sun:  Closed

Opening hours

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Slate chippings can also be collected loose from Mill Hill Quarry at only £58.00 per tonne + VAT

                                       Delivery can be arranged at extra cost

100mm blue cutface building stone

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    100mm blue cutface building stone @ £181.00 per tonne + VAT


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Offcuts - Ex Trevillett Quarry

We strongly advise that orders placed are for the total amount required for the project. Due to high demand any requests for additional stone to finish a job will be treated as a seperate order processed according to the date placed.

Approx coverage per tonne is based on using the stone in a traditional way. Cutting/splitting the stone will result in extra wastage.


We are pleased to announce that after many months of having limited stock, We now have Trevillett Cornish random roofing slates in stock