Concrete Building Blocks & Breeze Blocks

Buy concrete blocks for any project indoors and outdoors online today. Whether you’re a tradesperson building an extension for a client or a DIY garden wall at home, our collection of concrete blocks make construction straightforward. Discounts available on bulk orders.

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Get rapid 2–3 day delivery on concrete blocks — £18 under £125, £10 under £250, and FREE over £250.

Order now and get your concrete blocks delivered in 2-3 working days. Order as much as you want, when you want it. Purchase now and pay later, securely via Klarna or PayPal. And get 14-day refunds on unopened pallets. 

We stock concrete building blocks in sizes and strengths that cover all essential uses: load-bearing, infill, cavity, and decorative. Including:

  • • Dense concrete blocks like our 100mm Concrete Blocks Dense 7.3N provide strong load-bearing capacity.
  • • Lightweight ‘breeze’ concrete blocks such as 100mm Celcon Blocks Aerated 3.6N are easy to handle and improve insulation.
  • • General purpose breeze and concrete blocks such as our 140mm Breeze/Concrete Blocks 7.3N for building solid wall constructions including cavity, separating and partition walls.

While you’re here, you might also be interested in our concrete flags.

 

A 5* rated UK concrete blocks supplier online, with secure Klarna or PayPal payment options.

At Supreme Merchants our mission is simple: we make it easy for DIYers and tradespersons to buy what they need online. Our experts are ready to help if you aren’t sure which block type suits your project. 

And with free delivery on heavy materials over £125 and 14-day returns, you don’t have to worry about over-ordering or risk of waste.

Read why our customers have rated us 5 stars, on our independent 5-star reviews page here.

 

FAQs — Concrete Building Blocks & Breeze Blocks

Do you deliver breeze blocks nationwide?

Yes, we deliver across the UK within 2–3 working days. If you live in a remote part of the country, this may take a little longer. Please get in touch or read our deliveries page for more information. 

Can I return unused concrete blocks?

Yes, we offer a 14-day refund policy for unused materials in resale condition. Read more about our returns and cancellations here. 

Do you offer discounts for bulk block orders?

Yes, our volume order discounts apply across all categories. And special discounts on very large, bespoke orders. Get in touch with us for more information.