- Take to the water with this racing Catamaran floating toy sailboat. Packed with realistic features, it includes 2 sails, 2 dagger boards and rudder.
- Ideal for developing engineering skills, this 2-in-1 model sailboat kit lets kids build, play and rebuild, giving an introduction to how boats really work.
- Master the tactics of a world-class speed-sailor. Angle the sails for the ultimate racing position. Raise and lower the 2 dagger boards to maximize stability. Then use the rudder to steer.
- Looking for the best gifts for a toy boat fan? This LEGO® Technic™ Catamaran (42105) is a great choice. Designed for ages 8+, it’s ideal for LEGO fans looking for a new challenge, or for anyone with a passion for sailing.
- At over 12” (32cm) long, 8” (22cm) wide and 17” (44cm) high (from the bottom of the rudder to the top of the mast), this model sailboat is made for easy handling in the bathtub.
- Who needs batteries when you've got sails? Certainly not this LEGO® Catamaran! It's powered by imagination, so no batteries are required.
- Get building straightaway with full instructions for the Catamaran in the box. Ready to build the Race Power Boat? You’ll find extra instructions for this online.
- Young LEGO® fans can discover a whole new world of building fun with LEGO Technic™ plastic model kits. With cool vehicle designs and realistic functions, the action goes on long after the model is built.
- LEGO® building bricks are designed to the highest industry standards. LEGOTechnic™ building kits are consistent, compatible and connect easily every time.
- LEGO® Technic™ pieces go through robust testing to make sure every building set meets the highest global safety and quality standards.
Lego® Technic 42105 Catamaran
Current best price
LEGO 42105 is currently available from £34.99 incl. shipping at eBay. Only one retailer in our comparison stocks it.
Updated 4 November 2026 at 15:34
Lego 42105 price comparison: where is it cheapest?
Prices incl. shipping to the UK ·
Brickfact may earn a commission when you buy through a merchant link. Commissions do not determine the order of offers. How Brickfact compares prices
iFurther information
The Lego set Catamaran with the set number 42105 is part of the LEGO Technic theme and is recommended for ages 8+. It was released in January 2020. The model has 404 pieces, and we estimate it takes around 1 hour to build. 228 Brickfact users have this set in their collection.
The set weighs about 0.870 kg. The box measures 10.3 x 15 x 2.8 in (26.2 x 38.2 x 7.1 cm). The recommended retail price is £34.99.
Our Brickfact Lego price comparison compares the prices of 1 shop for this set. It is currently cheapest at eBay for £34.99 including shipping. That is £0.09 per piece. Unfortunately, the set is currently not available below its recommended retail price.
The Part-Out-Value (POV) is the sum of the average prices paid on bricklink.com for all parts of this set. It is about £31.45.
Lego 42105 product data
Set Information
Availability
Release
01/2020
Retiring Status
Retired (12/2021)
Price Information
RRP
£34.99
Insiders Points (for purchase at Lego)
280
Part Out Value
£31.45
i
Packaging
Weight
0.870 kg
Packaging dimensions
10.3 x 15 x 2.8 in
EAN (GTIN13)
5702016616446
Popularity with Brickfact users
- users have this set
- 228
- buyers in the last 12 months
- 11
228 Brickfact users have Catamaran in their collection. 11 users bought it in the last 12 months.
Based on anonymized Brickfact user collections; shown only for sets with at least 10 users. As of 4 November 2026.
Lego 42105 price trend
Average sale price on secondary marketplaces – not the new price at retailers.
- Current market value
- £33.63
- Growth vs. RRP
- −3.9 % £34.99
- Range
- £32.53 – £37.40
- Average
- £33.52
Loading price history…
Lego 42105 price history: how has the price changed?
Brickfact has been recording retailer prices since 24/10/2026. Best price so far: £34.99 (11 days ago).
- Current best price
- £34.99
- Best price since 24/10/2026
- £34.99 11 days ago
Daily lowest prices at the tracked shops, including shipping. Gaps indicate days with no recorded price. The table lists each shop’s lowest price.
Lowest price per retailer (since 24/10/2026)
| Retailer | Current | Lowest price | Date |
|---|---|---|---|
 eBay | £34.99 | £34.99 | 04/11/26 |
Lowest price per day that Brickfact recorded at the retailers in the price comparison, including shipping where known – as in the comparison above. Amazon offers are not included in the price history.
Official Set Description for LEGO 42105 Catamaran
Kids can recreate the thrill of boat racing with this super-cool LEGO® Technic™ (42105) Catamaran toy. For the first time ever, this LEGO Technic model toy floats on water! So, sailing enthusiasts can learn while they play. See how the sails work. Or how the dagger boards maximise stability and how the rudder steers. With the classic 2-hull catamaran design, this model boat is a fantastic recreation of the real thing.
Learn how to build and sail an awesome toy boat
Build… rebuild… play… display... There’s so much for kids to discover with this LEGO engineering toy. Have fun building the Catamaran – inspired by real race boats. Then set it in the bathtub to recreate speed sailing adventures before rebuilding into a Race Power Boat. If you're looking for toy boats that really float, this set is a great choice.
Unique toys and immersive building experiences
LEGO Technic sets are ideal for LEGO fans looking for a new challenge. They offer an advanced building experience for kids and adults who enjoy learning new engineering skills – or simply love to build.
Building Instruction for LEGO 42105 Catamaran
Part Lists for LEGO 42105 Catamaran
LEGO 42105 Frequently Asked Questions
How much does LEGO 42105 Catamaran cost?
The lowest price in the Brickfact price comparison is currently £34.99 incl. shipping at eBay. The RRP is £34.99.
Where can I buy LEGO 42105 cheapest?
Only one retailer in the Brickfact price comparison currently stocks LEGO 42105: eBay (£34.99).
Is LEGO 42105 still available?
LEGO has retired 42105 Catamaran. New copies are still available at 1 retailers in our price comparison while stocks last.
When was LEGO 42105 cheapest?
Since tracking began on 24/10/2026, the lowest shop price recorded by Brickfact for LEGO 42105 was £34.99 on 24/10/2026 at eBay, including shipping. Amazon prices are not included.
