While the cheapest sets created by legendary Danish toymaker LEGO cost as little as $5 (£4), there are plenty of wow-factor creations that retail for astonishing sums.

From iconic models of the Titanic and Eiffel Tower to coveted Harry Potter and Star Wars projects, read on to discover the 28 most expensive LEGO sets ever, as compiled by collectors' website BrickEconomy and ranked by their original US retail price. Where a set has been retired by LEGO, we've also included its current value, which is often substantially higher than the original price!

All dollar amounts in US dollars. Prices correct as of October 2026.

The 42115 Lamborghini Sián FKP 37 faithfully reproduces the vehicle at 1:8 scale. Developed in close collaboration with Lamborghini, the 3,696-piece set is part of the Technic range, known for its intricate and challenging builds that require advanced LEGO construction skills. Needless to say, the model is targeted at ages 18 and above.

Released in 2020 and retired in 2025, it's currently valued at $480 in the US and £379 in the UK, with an annual growth rate of 7.8%.

LEGO also worked closely with Ferrari to produce the Daytona SP3 in plastic brick form. Like the Lamborghini Sián FKP 37, it's a 1:8 scale model and part of the Technic range.

Consisting of 3,778 pieces, the supercar set was launched in 2022 and was retired in 2026. The expected annual rate of appreciation after the second year following its discontinuation is also 4%.

Another tricky-to-put-together set from the Technic range, the 42100 Liebherr R 9800 is a model of the world's biggest hydraulic excavator. Released in 2019 and discontinued in 2021, it comprises 4,108 pieces.

A new and sealed set is currently valued at $895 in the US and £706 in the UK. Its annual appreciation rate is around 11%. If you're in the market for a used set, you can expect to fork out an average of $455 in America and £358 in the UK.

Another 2026 release, this take on Koenigsegg Sadair's Spear Megacar is a Technic set comprising 4,104 pieces. Lucky and patient owners can assemble the vehicle's V8 piston engine, triplex suspension and nine-speed transmission.

The set won't be retired until 2028 at the earliest, and is then forecast to grow in price by around 4% annually after the second year of retirement.

This 2026 release features a multi-level take on the wizarding world's Ministry of Magic, starting at London street level and descending to the Hall of Prophecy. It includes 3,491 pieces and 14 minifigures.

Readily available for purchase, the set's likely retirement is some way off, but it's expected to grow by around 5% annually after the second year of retirement.

Released in 2024 as part of the Icons range, the 10333 The Lord of the Rings: Barad-dûr brings to life the infamous dark tower from The Lord of the Rings, complete with an illuminated Eye of Sauron. It's made up of 5,471 pieces, including 10 minifigures, and is targeted at adult LEGO fans.

It's due to be retired at the end of 2026. In terms of appreciation, the set's value is expected to increase by close to 5% annually after the second year following the end of its run.

Although it isn't the most expensive LEGO Harry Potter set, 71043 Hogwarts Castle is considered the hardest to build, though it's aimed at ages 16+ rather than strictly adults. The model of the boarding school for budding wizards consists of 6,020 pieces, including four minifigures, along with 27 microfigures.

The construction has enjoyed a long lifespan, having been released in 2018, but is due for retirement any month now. Once discontinued, it's expected to appreciate in value by around 5% annually after the second year.

The 10179 Ultimate Collector's Millennium Falcon was released in 2007 and retired in 2010. The Star Wars extravaganza comprises 5,197 pieces with five minifigures. It was marketed at ages 16 and above.

In 2014, a first-edition in an airtight case fetched a staggering $15,000 (£11.2k) at a Las Vegas auction, though a regular new and sealed specimen is valued at $3,118 in the US and £2,463 in the UK, with an annual appreciation rate of 5.9% typically. A used version in good condition is mega-pricey too, with an average sale price of $1,018 in America and £804 in the UK.

Yet another LEGO Star Wars creation and one of two Death Star models in this round-up, the 75159 is actually a re-release of a previous edition, though it has 213 additional pieces. The model was launched in 2016 and retired in 2020.

The 75159 Death Star has a value of $1,668 in the US and £1,318 in the UK if new and sealed, with annual growth of around 15%. Like many of the most sought-after LEGO Star Wars sets, secondhand versions are far from cheap: a specimen in good condition will typically cost you $724 in America and £572 in the UK.

Launched in 2021 and discontinued in 2023, the 3,854-piece 42131 Cat D11 Bulldozer from the Technic range is an app-controlled replica of the eponymous bulldozer aimed at LEGO enthusiasts 18 years old and above.

These days, a new and sealed specimen is worth $868 in America and £686 in the UK, with an annual appreciation rate of close to 15%. Meanwhile, a used set in good condition is typically priced at $433 in the US and £340 in the UK.

The 75397 Jabba's Sail Barge replicates the Hutt crime lord's luxurious mode of transport from The Return of the Jedi. This particular Star Wars Ultimate Collector Series set for grown-ups was released in 2024 and comprises 3,943 pieces, including 11 minifigures.

The kit is due to be retired very soon. Once discontinued, it's poised to grow in value by nearly 6% annually after the second year post-retirement.

One of two sets in this round-up from the Marvel Super Heroes range, the 76269 Avengers Tower came out in 2023. With a height of 35 inches (90cm), it's among the tallest LEGO sets ever made. All in all, the adult-orientated kit has 5,201 pieces with a generous 31 minifigures.

The set is available without a wait from both the US and UK LEGO sites, but is due to bite the dust soon. In terms of appreciation, its value is expected to grow by close to 5% annually after the second year following the end of its run.

The second priciest of the LEGO sets themed around The Lord of The Rings, this model of the Elven idyll Rivendell features 6,167 pieces, including 15 minifigures.

Targeted at ages 18 and up, the set was released in 2023 and is slated for retirement imminently, so if it's on your wishlist, you'd better get cracking. Once retired, the set is expected to appreciate in value by close to 5%, but only after the second year following its discontinuation.

The 76405 Hogwarts Express Collectors' Edition is the most expensive Harry Potter LEGO set to date, but it isn't the largest, with the 71043 Hogwarts Castle holding that distinction. That said, the model of the locomotive that runs between London King's Cross Station Platform 9¾ and Hogsmeade Station is by no means modest, with 5,129 pieces, including 20 minifigures.

Launched in 2022 and retired in 2024, the adult-orientated set is worth $648 in the US and £512 in the UK when new and sealed. If you're looking for a used version, you can expect to pay an average of $442 in America and £349 in the UK.

The priciest set from the Marvel Super Heroes range, the 76210 Hulkbuster is an intricate model of Tony Stark's 44th Iron Man suit from The Avengers: Age of Ultron movie. Targeted at adults, it comprises 4,049 pieces and includes a Tony Stark minifigure.

The set was released in 2022 and has since been discontinued. A new and sealed version is currently valued at $680 in the US and £538 in the UK.

The 10276 Colosseum from the Icons range is an elaborate Creator model for ages 18 and up.

The recreation of the Roman amphitheatre is one of the largest LEGO sets ever created, with 9,036 pieces in total. Released in 2020 and retired in 2023, it's now worth $1,499 in the US and £1,185 in the UK if new and sealed, with an annual appreciation rate of 35%. Prices for a secondhand specimen average out at $590 in the US and £468 in the UK.

Billed as the ultimate build for Star Wars: The Mandalorian fans, the 75331 The Razor Crest is a model of the assault ship used by Din Djarin. Aimed at adults, the set is made up of 6,187 pieces, including five minifigures.

Launched in 2022, this Star Wars Ultimate Collector Series kit was recently retired. It's currently valued at $690 in America and £546 in the UK.

Knocking it out of the park with an incredible 10,001 pieces, the 10307 Eiffel Tower from the Icons series is the biggest set in this round-up and second only in size to the 31203 Art World Map, which consists of 11,695 pieces.

The depiction of the Paris landmark is also the tallest LEGO set ever created, soaring to a height of 58 inches (128cm). The Creator model for ages 18+ is considered the hardest LEGO set to build too, according to Brickfact. Released in 2022, it's still in production but its retirement is imminent. Once discontinued, the product is predicted to increase in value by nearly 5% annually following the second year.

Comprising 5,374 pieces with two minifigures, the 75367 Venator-class Republic Attack Cruiser was released in 2023 to mark the 20th anniversary of the Star Wars: Clone Wars show, which debuted in 2003.

Aimed at adults, the Star Wars Ultimate Collector Series set is sold out on the US LEGO site but is available on the UK site. Its retirement is expected imminently. Once discontinued, the set is poised to grow in value by almost 6% annually following the second year post-retirement.

This seven-tiered recreation of Minas Tirith from The Lord of the Rings was released in 2026. It boasts a staggering 8,278 pieces. The kit also exclusively features the Aragorn as King Elessar minifigure, the most sought-after in the LEGO LOTR range.

Available for purchase directly from the LEGO site, the kit is expected to see annual growth of around 5% after its eventual retirement.

The official LEGO Pokémon range launched in 2026, and this 6,838-piece kit is currently the priciest entry. It features a trio of Kanto Region evolutions of Venusaur, Charizard and Blastoise. The models can be displayed individually or in battle mode on stands depicting jungle, volcano and beach locations.

Readily available on LEGO sites in the US and UK, the set is expected to see annual growth of around 6% in the second year after it is eventually retired.

The most expensive set from the Creator Icons series, the 10294 Titanic is a remarkably detailed 1:2000 scale model of the doomed ocean liner. It debuted in 2021. Aimed at ages 18 and up, the set consists of 9,090 pieces.

The kit is on backorder on the US LEGO site but available now from its UK counterpart. It's due to be discontinued soon. Once retired, the product is expected to appreciate in value by close to 5% annually after the second year.

The 42146 Liebherr LR 13000 recreates the world's most powerful crane in plastic brick form. The most expensive Technic build, it's the second-tallest set in this round-up, with a height of 39 inches (99cm), and the second most challenging LEGO set overall to construct, according to Brickfact.

Launched in 2023, the 2,883-piece set for adult LEGO enthusiasts has been retired. A new and sealed version is currently worth $720 in America and £568 in the UK.

The 75252 Imperial Star Destroyer from the Star Wars Ultimate Collector Series consists of 4,784 pieces, including two minifigures.

The set for ages 16 and over was released in 2019 and retired at the end of 2022. The value of a new and sealed model has since climbed to $1,390 in the US and £1,100 in the UK, with an annual growth rate of 19.6%. If you're looking for a used specimen, expect to pay around $765 in America and £600 in the UK.

Released in 2026, this 6,130-piece kit is the most recent high-end instalment in the Star Wars Ultimate Collector Series. It recreates Darth Vader's Executor from The Empire Strikes Back and comprises seven figures, including Boba Fett and other bounty hunters.

It's still available on the US and UK LEGO sites, but demand for this one is expected to be high, with a predicted annual growth of around 6% two years after it's retired.

The joint second most expensive LEGO model ever released, the 75313 AT-AT comprises 6,785 pieces with nine minifigures, though it has space for 40.

Aimed at adults, the Star Wars Ultimate Collector Series model of the Empire's most formidable combat walker was launched in 2021 and has since been retired. Right now, it's worth $1,499 in America and £1,184.99 in the UK if new and sealed, and currently has an annual appreciation rate of around 23%.

Sharing the accolade with the 75313 AT-AT as the joint second-most expensive LEGO product in existence, the 75192 Millennium Falcon solely held the title when it launched in 2017, four years before the former was release at the same price.

With 7,541 pieces, including eight minifigures, the 75192 Millennium Falcon was the largest LEGO set upon its release. The Star Wars Ultimate Collector Series kit for ages 16+ sold out almost immediately, but LEGO has since replenished stock. It's currently available on the UK LEGO site, but is due to be retired soon. Once discontinued, the set is expected to appreciate in value by 6% annually after the second year.

Released in 2025, the 75419 Ultimate Collector Series Death Star II is the most expensive LEGO set ever, retailing for a colossal $999.99 in the US and $899.99 in the UK.

This incarnation of the Death Star consists of over 9,000 pieces and 38 minifigures, and recreates locations from the first Star Wars movie, including the trash compactor and Princess Leia’s holding cell. Still available for purchase directly from the LEGO site, this huge, intricate kit looks set to hold the record of most expensive for some time to come.

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