Collection: Just Building Blocks
Build Anything with Giant Lego Blocks for Adults
Remember the joy of clicking blocks together? Our giant building blocks bring that same satisfying experience to serious construction projects. No tools, no skills, no limits - just pure building pleasure that lasts decades.
Transform any space in hours, not weeks

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PolyBrick® Double Block
5.0 / 5.0
(4) 4 total reviews
Regular price £0.90 GBPRegular priceUnit price / perPolyBrick® Double Block
Regular price £0.90 GBPRegular priceUnit price / perPolyBrick® Double Block
Regular price £0.90 GBPRegular priceUnit price / per -
PolyBrick® Double Cap
Regular price £0.68 GBPRegular priceUnit price / perPolyBrick® Double Cap
Regular price £0.68 GBPRegular priceUnit price / perPolyBrick® Double Cap
Regular price £0.68 GBPRegular priceUnit price / per -
PolyBrick® Single Block
5.0 / 5.0
(1) 1 total reviews
Regular price £0.72 GBPRegular priceUnit price / perPolyBrick® Single Block
Regular price £0.72 GBPRegular priceUnit price / perPolyBrick® Single Block
Regular price £0.72 GBPRegular priceUnit price / per -
PolyBrick® Single Cap
Regular price £0.58 GBPRegular priceUnit price / perPolyBrick® Single Cap
Regular price £0.58 GBPRegular priceUnit price / perPolyBrick® Single Cap
Regular price £0.58 GBPRegular priceUnit price / per
More Reasons to Buy PolyBrick Blocks
Why PolyBrick® Giant Building Blocks Beat Everything Else
Built to Last Forever
Forget timber that rots or concrete that cracks. These big building blocks are engineered from UV-stable recycled plastic to withstand decades of British weather without maintenance, repairs, or replacements.
No Tools, No Mess, No Stress
Like giant lego blocks, they simply click together. No digging foundations, mixing concrete, or calling contractors. Build professional structures in hours, not weeks.
Completely Weatherproof
Rain, snow, frost, UV rays - our jumbo building blocks handle it all whilst maintaining their strength and appearance. Your creations look perfect year after year.
Change Your Mind, Change Your Look
Don't like the plastic finish? Clad with timber, stone, or any material you prefer. Transform the appearance whilst keeping all the structural benefits.
Let customers speak for us
from 18 reviewsLiterally from the first point of placing the order, going through the transaction and completing the order, to receiving the product within a few days, super service :-)
Superb business run by a lovely team, from sales to customer service & management, and providing a fantastic product, with multiple uses! Great stuff! Thanks again!

Such a good idea, simple to work with a great quality. A good company to order from too. Super service

Made a planter for my mam’s garden she loved it can’t wait to make one for us now funky design

Great service. Really kind and polite people who gave me lots of advice answering all my questions!!
Amazing bricks!!! Built all sorts round the farm with them. Pig troughs, mounting blocks, temporary gates, little obstacle courses for the ponies - the list is endless!!! Want more!!!!

Very straightforward to set up. Used a rubber mallet to get the blocks lined up and slotted together then started filling with grass cuttings pretty much right away.

I dont normally write reviews but felt that this product deserved some love.
Dead easy to build anything. I made a low retaining wall and raised bed.
Brilliant....

I was dubious about this product, but they are brilliant. We used them for a wood store. Fast delivery and very simple to use. Would defo order again for our next project

Used this for my garden, looks great and product is excellent quality

I built a cloche for my plants with the grey bricks and put a clear perspex cover on top. Keeps my plants warm and looks premium 👌


Infinite possibilities. One simple system.
Start small with a planter, expand into retaining walls, reconfigure into seating - our modular construction system grows with your imagination. Every component works together perfectly, so you can build, rebuild, and create exactly what your space needs.
Double Blocks for main construction. Single Blocks for precision finishing. Caps in three colours for the perfect edge. Mix, match, and build without limits.

Building a Better Future, One Block at a Time
British-made sustainability that performs better than traditional alternatives. Every PolyBrick® giant building block is made from 100% recycled polypropylene right here in the UK. By choosing our large lego blocks, you're not just building amazing structures - you're helping divert plastic waste from landfills and reducing demand for virgin materials.
Creative Ideas & Inspiration
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Building a Garden Chair
How Our MD Ted Built His Garden Chair in Just 1 Hour Even when you're the Managing Director of PolyBrick®, there's nothing quite like putting your own product to the...
Building a Garden Chair
How Our MD Ted Built His Garden Chair in Just 1 Hour Even when you're the Managing Director of PolyBrick®, there's nothing quite like putting your own product to the...
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Building a Tiered Herb Planter
Building a Two-Tier Herb Planter: Ray's Kitchen Garden Success Story When Ray from Norfolk decided to grow his own herbs, he faced a common problem - limited space and poor...
Building a Tiered Herb Planter
Building a Two-Tier Herb Planter: Ray's Kitchen Garden Success Story When Ray from Norfolk decided to grow his own herbs, he faced a common problem - limited space and poor...
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Building a Large Tree Planter
Replacing an Oak Barrel: Building a Large Tree Planter with PolyBrick® When Luna's beloved oak barrel planter finally gave up after years of faithful service, she faced a dilemma. Her...
Building a Large Tree Planter
Replacing an Oak Barrel: Building a Large Tree Planter with PolyBrick® When Luna's beloved oak barrel planter finally gave up after years of faithful service, she faced a dilemma. Her...
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Building a Garden Raised Bed
Take a look at this raised bed built by the IBRAN team. In less than an hour, the team at IBRAN assembled this massive three-sided raised bed area. The brief...
Building a Garden Raised Bed
Take a look at this raised bed built by the IBRAN team. In less than an hour, the team at IBRAN assembled this massive three-sided raised bed area. The brief...