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LEGO Architecture Trafalgar Square 21045

Retired 2021 · 1,197 pieces · Factory sealed · Set 21045
LEGO 21045 Architecture Trafalgar Square 21045 sealed box front

This set offers an impressive build for enthusiasts aged 16+ who appreciate detailed cityscapes, adding architectural beauty to any LEGO collection.

£120.99 Free tracked UK delivery over £85
Sold out. We do not have a sealed one on the shelf today.
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Our sealed guarantee

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.

Goes on the back-in-stock list for set 21045 only. One email when it lands, then off again.

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About this set

Retirement and specification

Set number21045
Pieces1,197
Released2019
Retired2021
Built size12 × 24 × 20 cm
Age guide16+
ConditionNew, factory sealed

LEGO stopped making this set in 2021. 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

Architecture Trafalgar Square 21045

Architecture Trafalgar Square, set number 21045, was released in 2019 as part of the LEGO Set theme. With 1,197 pieces, it was a significant addition to collections and retired in 2021.
In depth

The full description

The LEGO Architecture Trafalgar Square set (21045) is a retired architectural model that captures one of London’s most iconic public spaces. This is a factory-sealed example, still in its original packaging, never opened or built. If you’re looking for a pristine, complete set from the Architecture range, this is it.

What You Get

  • Factory-sealed LEGO Architecture set 21045 in original packaging
  • Complete, unbuilt model, every piece accounted for and verified
  • Full instruction manual included
  • Authentic LEGO minifigures and architectural elements
  • Display-ready model upon completion

Why This Set

The Architecture theme is designed for adult builders and collectors who appreciate precision, detail, and real-world accuracy. Trafalgar Square is a recognisable landmark that translates beautifully into LEGO form, making it a rewarding build from start to finish.

The build itself is engaging without being overwhelming, it strikes the balance that makes Architecture sets so popular. You’ll work through constructing the iconic elements of the square, developing a genuine connection to the model as you piece it together. Once complete, it stands as a striking display piece that works equally well on a shelf, desk, or as part of a larger collection.

Because this set is retired, it’s no longer in regular production. This makes sealed examples harder to find, and worthwhile for anyone who missed the original release window or simply wants to own a complete, unopened copy.

Condition Guarantee

This set is factory-sealed in its original LEGO packaging. It has been verified and stored correctly by BuyMyBricks. We guarantee that every single piece is present and undam aged, if you open the box, you’ll find a complete set ready to build. We don’t sell sets with missing pieces, worn packaging, or questions marks. What you see is what you get.

Free tracked UK delivery on orders over £85. If you’re not entirely satisfied, returns are accepted within 30 days of receipt, unopened sets can be returned in original condition 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.

Before you buy

Guides for this set

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