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Treehouse Building Set - 21318

Treehouse Building Set - 21318

Prix habituel $109.90 USD
Prix habituel $249.99 USD Prix promotionnel $109.90 USD
Promotion Épuisé
Frais d'expédition calculés à l'étape de paiement.
Quantité

Stock bas : 7 restant(s)

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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.

✔ Direct distribution model    ✔ No retail showroom markup    ✔ Limited clearance batch

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

✅
Secure checkout
⚡
Fast order processing
📦
Tracked delivery
💬
Responsive support

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: [email protected]

Product Specifications

Dimensions

Measures over 14” (37cm) high, 10” (27cm) wide and 9” (24cm) deep.


Afficher tous les détails
  • 5 stars: 11 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Brian K.
Lego Tree house

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....

A
Adam G.
Great Product

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.

J
Jessica N.
My very first Lego set!

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?!

S
Stephanie O.
WOW!!

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!!!

A
Aaron R.
Renewed my love for LEGO

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.

T
Tina I.
A work of art.

When I first started collecting Lego last year, I saw this set and, well, I didn't drool, that would be pretty weird, but my pupils definitely dilated. It was always sold out whenever I looked so I gave up for a while and finally lucked out. It's huge! And gorgeous! From EVERY single angle. I couldn't believe it. I like to change out my sets every now and then but if I was going to leave one out permanently, this would definitely be one of them. I adore every bit of it. I always wanted a tree house like this when I was a kid. This is even better as an adult. No splinters or Tetanus shots necessary!

J
James T.
Get Outdoors

I sat on the fence for a long time with this particular set but everyone I spoke to online that had built it said it was an incredible build and well worth it. So, I took the plunge and bought it and then it sat in my stash cupboard for about 3 months before I decided it was time to give the build a go. This is a highly detailed set and I could not believe how much detailing there is in the little cabins that make up the Treehouse itself. Lego also managed to squeeze a toilet in there (although Lego do seem to have a slight toilet fixation) alongside bunk beds, a little astronomy outpost and loads of other little bits an pieces. The tree itself is a good sturdy build but I did find that attaching the cabins to the branches was quite tricky and it did take me a little bit of time to align them properly and then to push them in to place - it takes more force than you would think. Even better there are colour codings above the doors for each cabin and these correspond to bricks used in the roof builds so even if you take all of them off either for play or display it is easy to see which roof goes where afterwards. Nice little touch. I built mine with the green leaf option and I have to admit I probably won't change them out with the seasons. Number Of Pieces: 3036 Approximate Price Per Piece: £0.03 Build Time: 9.25 Hours

E
Emily B.

maravilloso cuando se lo entregue a mi hijo y lo arme subiré fotos, pero desde ya se ven increíbles las piezas y a un excelente precio

N
Nelson Smith

Delivered as expected

R
Ryan Y.

Perfetto

P
Patrick E.

Good set and good instruction sheet best ive had yet. From Kent, UK