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Treehouse Building Set - 21318
Treehouse Building Set - 21318
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EXPRESS JCB
Ideas Tree House (21318)
Trusted by thousands of adult builders worldwide.
An iconic adult build designed for builders 16+.
Over 3,000 pieces. One unforgettable display.
✔ Ideas Set ✔ Adult Build (16+) ✔ Limited Availability
Why Is The Price Lower?
We work with limited inventory batches, overstock units, and promotional allocations. By reducing retail overhead and operating online-only, we're able to offer better pricing while maintaining full product quality and secure fulfillment.
Not a Toy — A Build Worth Displaying
The Ideas Tree House is created for adults who love thoughtful design, immersive building, and display-worthy results. Once completed, it becomes a centerpiece — not something you put back in the box.
Why Adult Builders Love It
🧠 Challenging & Rewarding
Over 3,000 pieces create a deeply engaging build that takes hours — not minutes.
🍃 Nature-Inspired Design
Organic textures, tree structure, and interchangeable seasonal leaves.
🏡 Display-Worthy Finish
Designed to look stunning on shelves, desks, or in your living space.

Packed With Thoughtful Details
- Three uniquely designed tree house sections
- Fully detailed interiors with furniture and accessories
- Removable roofs for easy viewing
- Hidden elements and playful surprises
- Interchangeable green & autumn-colored leaves

Genuine Ideas Construction Set
This is a genuine Ideas product — not a replica, not a clone. Every set is complete and carefully packaged to ensure a premium experience.
A Ideas Classic Loved Worldwide
Frequently praised by adult fans as one of the most iconic Ideas sets ever released.
1,200+ Adult Builders Ordered This Month

⚠ Limited Clearance Batch
Only 17 units remaining from this batch.
Once sold out, price returns to regular retail.
Buy With Confidence
Designed for builders 16+. Limited availability.
Shop With Confidence
We understand that some websites advertise unusually low prices but fail to deliver products. Your trust matters to us, and we operate with full transparency and accountability.
Our Commitment to You:
- ✔ Guaranteed Fulfillment: Every order is processed, packed, and shipped with tracking.
- ✔ Complete Set Assurance: If any piece is missing or damaged, we provide free replacement parts.
- ✔ 30-Day Protection: If your order has any issue, we offer replacement or refund support.
- ✔ Secure Payments: Encrypted checkout for full payment protection.
Need Assistance?
If you ever need help, simply contact our support team and we’ll respond promptly.
📩 Email: info@mybrickoras.com
Dimensions
Measures over 14” (37cm) high, 10” (27cm) wide and 9” (24cm) deep.
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Whort every money, some challenging building,where to place thing?...Difficult to see in the instructions. No stickers:-) The finish Tree house look good in my living room!! Better than the pictures on net, told me. And one of many cool things is the swing,that moves and never stops if you have a lego figure on it....
this is a great product, my kids love it they have so much imagination when it comes to the treehouse. It fits all type mini figures So you can play with and use it as a background. My kids use all the Lego mini figures like Disney the Simpsons Star Wars Flintstones and so much more.
This treehouse is the first set I have ever built. I saw it online and instantly fell in love with it. I wasn’t sure what to expect being that I have never played with Legos. Easy to follow and precise instructions made this build exciting and fun! It is very secure and stable. I built in on a hard surface and ensured all pieces were firmly and securely put together one brick at a time. I thought this would be my winter project however I instantly became addicted and put it together in five short days! I highly recommend! This treehouse is very sturdy! I ordered a set of lights for it on Amazon and I can’t wait to see what it looks like at night! Now I’m looking for my next set! Maybe the Taj Mahal?!
Let me start out by saying that I found this set at a yard sale…yes a yard sale. Had never been opened. So to say I was excited is an understatement…and the price!! Wooooo!! But I would also pay full price for this set bc it is so worth it. It took me 3days, on and off, to build it. It is a fun build!!! It isn’t complicated, the instructions are easy to read and navigate, the pieces are awesome and the way it all goes together is awesome!!! It’s a beautiful set as well. I did the leaves a little different-I mixed them together-(it comes with 2 sets of leaves-green ones and autumn ones)-so I mixed them up and have a more ‘the leaves are changing’ aspect…it’s not really a ‘play’ set but my son has been playing with it somewhat, the best that he can. In my opinion it’s more of a display set. But if you have been thinking of buying this set, DO IT. You will not regret it!!!
Growing up I always loved LEGO, it was one of my favorite hobbies. As I got older I kind of lost interest and viewed it more as a children’s toy. During the start of the pandemic I was scrolling through Instagram and saw this treehouse that someone else had built and I was immediately obsessed. It brought back so many memories from my childhood and sparked a newfound interest in LEGO for me. I immediately went to the nearby LEGO store and picked it up. Ever since then I have been buying sets (specifically the IDEAS collection). I appreciate that LEGO is not only catering to the younger builders but the older builders who grew up with LEGO as well. This set is not only a great build with so many little details, but an awesome display piece. I highly recommend purchasing this set, especially since it is allegedly close to retiring.
