BuyMyBricks
LEGO Creator Expert Assembly Square - Modular Building 10255
Retired 2024 · 4002 pieces · Factory sealed · Set 10255
Just in
This is a substantial build at 4,002 pieces, roughly 12 hours for most builders, with four distinct interior environments that reward exploration.
£313.99
Free tracked UK delivery over £85
In stock, 1 sealed. Order before 3pm and it goes out today, tracked and insured.
Genuine and sealed, or your money back.
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If a set from us is not genuine and factory sealed, tell me and I refund in full and pay the return postage. Returns for any other reason within 30 days.
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About this set
Retirement and specification
| Set number | 10255 |
|---|---|
| Pieces | 4002 |
| Released | 2017 |
| Retired | 2024 |
| Built size | 35 × 38 × 25 cm |
| Age guide | 16+ |
| Condition | New, factory sealed |
LEGO stopped making this set in 2024. It is not coming back, so sealed copies are what is left.
What you are actually buying
What turns up at your door
The sealed box itselfThe set in its original factory-sealed box, not a bagged or re-boxed copy. Seals and tape are checked before it is listed.
Any box wear, written downRetired boxes have been in lofts and on shelves. Anything worth knowing is on the listing before you buy, not after.
Packed to survive the courierBoxed inside a second carton with fill, so the set box is not the thing taking the knocks.
Tracked and insured, every orderYou get the tracking number the day it leaves. If it is lost or damaged in transit that is ours to sort, not yours.
Why we rate this set
Creator Expert Assembly Square - Modular Building 10255
Released in 2017, Assembly Square represented a significant step forward for LEGO's Icons range, a modular building that combined architectural detail with genuine play-ability across four storeys. The set struck the right balance between complexity and accessibility, making it instantly popular with experienced builders who appreciated its period streetscape authenticity and meticulous interior design work.
Assembly Square retired in 2024 and is no longer available in shops. What you're buying from us is a sealed, original example, sourced from verified suppliers and inspected before list...
In depth
The full description
The LEGO Creator Expert Assembly Square (10255) is a retired modular building set that represents the pinnacle of LEGO’s architectural design philosophy. This is a factory-sealed example, untouched since it left the factory, offering both the authentic build experience and museum-quality display piece that serious collectors seek.
What You Get
- Factory-sealed box with original LEGO packaging intact
- Complete, unbuilt set with all components and instruction manual
- Modular building design that integrates with other Creator Expert architecture sets
- Intricate architectural detailing and realistic street-level features
- A substantial build project suitable for experienced builders
Why This Set
Assembly Square is one of LEGO’s most celebrated modular buildings, and building it is a genuinely rewarding experience. The construction process is methodical and absorbing, you’ll spend hours bringing together carefully designed sections that eventually form a cohesive, detailed structure. The set rewards patience with authentic architectural elements, layered facades, and the kind of fine detail that only LEGO’s Creator Expert line delivers.
Once built, this set becomes a centerpiece. The modular design means you can display it standalone or integrate it with other Creator Expert buildings to create an entire miniature streetscape. The level of finish, from street-level shopfronts to roof detailing, makes it equally striking from every angle. This is a set that commands attention on a shelf or display cabinet.
Because 10255 is retired, finding sealed examples becomes increasingly difficult. This is a piece of LEGO history that’s no longer in production, making it a genuine rarity in the collector’s market.
Condition Guarantee
This set is factory-sealed and has been verified by BuyMyBricks. We inspect every sealed set in our collection to confirm authenticity and condition before it ships. Every piece inside is guaranteed to be present and in perfect condition, sealed sets remain untouched from manufacture, so there’s no wear, no missing elements, and no surprises when you open the box. You have our word on it.
Shipping & Returns: Free tracked UK delivery on orders over £85. If you’re not entirely satisfied, you have 30 days to return the set for a full refund, no questions asked.
Common questions
The things people ask
Is it genuine and factory sealed, and what if it is not?
Every set is checked before it is listed: the factory seals and tape first, then the corners and edges, and anything worth knowing about the box goes on the listing. If a set from us is not genuine and factory sealed, tell me and I refund in full and pay the return postage. We sell sealed retired sets and nothing else, so there is no opened or used stock for yours to get mixed up with. Returns for any other reason are within 30 days, sealed, as the returns policy says.
When will it arrive?
Order before 3pm on a working day and it goes out the same day, tracked and insured. UK orders arrive within 1 to 3 working days, and you get the tracking number by email as soon as it is on its way. Tracked UK delivery is free over £85.
How is it packed, and what if the box arrives damaged?
The set box travels inside a second carton with fill, so the courier handles the outer box and not the one you are keeping, and every parcel is insured to its full value. If it still turns up damaged, photograph the outer packaging and the set box before you unpack any further, then email support@buymybricks.com with the photos and your order number the same day. We reply the same working day with a replacement if we have one or a full refund, and we deal with the courier claim ourselves so you do not have to.
Do you ship outside the UK?
Yes to the United States and Canada, with tracked and insured delivery costed at checkout before you pay. We do not ship to the EU at the moment. Everywhere in the UK is covered by the standard tracked service.
Can I return it?
Yes, within 30 days of delivery. If it arrived damaged or not as described, tell us and we pay the return postage and refund in full or replace it. If you have simply changed your mind, the set needs to come back sealed and as it arrived, and the return postage is yours. The refund goes back to the card you paid with within 3 working days of the set landing back with us. Use a tracked service so there is proof of delivery.
Is there a discount code?
Yes. Join the email list on any page and your first-order code comes through in the first email, along with what has just landed. We do not print the code on the site, so the list is the way to get it.
Can I pay in instalments?
Yes. Klarna Pay in 3 is at checkout: three equal payments, no interest and nothing extra to pay. Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay and Shop Pay are all there too. Payment is handled by Shopify Payments and we never see your card details.
Is it going to be a gift?
Tell us in the order notes at checkout and no prices or invoice go in the parcel. Sending it straight to them is fine: put their address as the delivery address and keep yours as the billing address.
Can I have a VAT invoice?
Yes. We are VAT registered and every price on the site already includes VAT. Reply to your order confirmation asking for one and it comes back the same working day. For a business or bulk order, email support@buymybricks.com before you buy and we will sort an itemised invoice.
Not the set you want?
Tell us the set number and we will look for a sealed one through the trade. If we find one at a sensible price you get an email with the link before it goes on the site. Ask us to find it.
Not answered here? Email support@buymybricks.com or ring 01904 900212. A person reads it, usually the same day.
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