Ages 9+

Deep-Sea Research Submarine (42201)

Name: Deep-Sea Research Submarine
Brand: LEGO
SKU: 42201
Rating: 5 (5 reviews)

Prices last checked: 30 April 2026 at 18:29

LEGO.com RRP:

£34.99

LEGO.com

★5.0

(5 reviews)

★4.8

🧱 413 pieces - : £0.08

Available From

Best Deal

€27.42(~£23.03)

Free delivery

Price checked: 29 Apr 2026

View Deal →

€29.74(~£24.98)

Price checked: 30 Apr 2026

View Deal →

£34.88

£34.99

Free delivery

Price checked: 30 Apr 2026

View Deal →

£35.00

Price checked: 30 Apr 2026

View Deal →

LEGO.comOfficial

£34.99

Price updated: 30 Apr 2026

View on LEGO →

Building Instructions Brickset

Price Analysis

Lowest Price Ever

£3.99

at Amazon UK · Jan 2026

Average Price (12mo)

£30.58

Current vs Average

-18.3%

Below average

Price Trend

Falling

Last 30 days

Best Month to Buy

January

Value Score

10.0/10

Price-per-piece vs theme avg

The lowest price we've recorded for Deep-Sea Research Submarine is £3.99 at Amazon UK in January 2026. The current price is 18.3% below the 12-month average of £30.58. Prices have been trending downward recently — a good time to buy. Historically, January tends to offer the best prices for this set.

Price History & Buying Verdict

VerdictGood time to buy

•It's currently 18.3% below the 12-month average price of £30.58 — a notably good window.
•Prices have trended downward over the last 30 days — there's a chance of a further dip.
•On price-per-piece, this is one of the better-value sets in the Technic range (value score 10.0/10 vs theme average).
•A recent price drop of about £10.49 was recorded in the last 30 days.

We've been tracking the price of LEGO Technic Deep-Sea Research Submarine (413 pieces) for 106 days, recording 47 data points across LEGO.com and major UK retailers. Over that period the price has dropped 6 times below previous levels, with the lowest price ever recorded being £3.99 at Amazon UK in January 2026.

The 12-month average sale price for set 42201 works out to £30.58 — that's 12.6% below the LEGO RRP of £34.99. The highest price we recorded across our tracked retailers was £35.00, giving a range of about £31.01 between the cheapest and most expensive observation.

Amazon UK has run the most price drops on this set in the period we've tracked, making it the retailer most worth watching for short-term deals. Historically, January has produced the lowest average prices for Deep-Sea Research Submarine, so if you're not in a hurry it's worth bookmarking the page closer to that window. Prices have been trending downward over the last 30 days.

Want to see how LEGO Deep-Sea Research Submarine (set 42201) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.

Description

Deep-Sea Research Submarine (42201) is a LEGO Technic set with 413 pieces, with an RRP of £34.99. It's currently available from £23.03 at Amazon FR. Prices have been falling over the last 30 days. With a value score of 10.0/10, this set offers excellent value compared to other Technic sets.

Inspire kids aged 9 and up to explore the secrets of the oceans with this Deep-Sea Research Submarine toy set (42201). The model is packed with features like those found on real submarines, including steering, 3 spinning propellers, 3 air tanks, and a cockpit with seat and controls. The submarine features an extending arm to grab and lift the barrel accessory as kids play out their own sea-bed adventures.

This submarine model kit comes from a range of LEGO® Technic™ sets which feature realistic movement to introduce young builders to the universe of engineering. This set makes a great gift for kids who enjoy buildable vehicle toys.

Let the LEGO Builder app guide your child on an intuitive building adventure, allowing them to zoom in and rotate models in 3D, save sets and track their progress.

Features

Submarine toy set for kids aged 9 and up – Let young science and engineering fans create their own deep-sea adventures with this LEGO® Technic™ Deep-Sea Research Submarine toy
Lots of realistic features – This creative building set includes lots of realistic features like the rotating propellers and grabbing arm to help kids explore how submarines work
Opening cockpit – The transparent cockpit opens to give access to the seat and controls
Barrel accessory – The set comes with a barrel accessory, which kids can pick up using the submarine’s extending grabbing arm
A gift for kids – This set makes a fun gift idea for kids who like exploring science and engineering toys or anyone who is interested in submarines and deep-sea exploration
A helping hand – Discover intuitive instructions in the LEGO® Builder app, where builders can zoom in and rotate models in 3D, track their progress and save sets as they develop new skills
An introduction to engineering – LEGO® Technic™ sets featurerealistic movement and mechanisms to introduce young LEGO builders to the universe of engineering
Measurements – A 413-piece set with a model measuring over 6 in. (15 cm) high, 9.5 in. (25 cm) long and 6 in. (15 cm) wide

Frequently Asked Questions about Deep-Sea Research Submarine

What is the best price for LEGO Deep-Sea Research Submarine (Set 42201)?

LEGO Deep-Sea Research Submarine (Set #42201) is currently priced at £34.99 on LEGO.com. We continuously monitor prices across multiple UK retailers to find you the best deals.

How many pieces are in LEGO set 42201?

LEGO Deep-Sea Research Submarine (Set #42201) contains 413 pieces. At the best available price of £27.42, that works out to approximately 6.6p per piece.

What age is LEGO Deep-Sea Research Submarine suitable for?

LEGO Deep-Sea Research Submarine (Set #42201) is recommended for ages 9+. This set is part of the LEGO Technic theme. View all Technic sets and deals.

Where can I find the building instructions for LEGO Deep-Sea Research Submarine?

You can download the official building instructions for LEGO Deep-Sea Research Submarine (Set #42201) for free from LEGO.com. Download the building instructions here. The instructions are available as a PDF and can be viewed on any device.

Where can I buy LEGO Deep-Sea Research Submarine in the UK?

LEGO Deep-Sea Research Submarine (Set #42201) is available from 4 UK retailers including Amazon FR, Amazon DE, Amazon UK and others. Prices range from £27.42 to £35.00. It's also available directly from LEGO.com at £34.99.

What is the lowest price ever recorded for LEGO Deep-Sea Research Submarine?

The lowest price we've recorded for LEGO Deep-Sea Research Submarine (Set #42201) is £3.99 at Amazon UK in January 2026. That's 89% off the LEGO RRP of £34.99. Track the latest movements on our LEGO price history page.

Is LEGO Deep-Sea Research Submarine good value for money?

Comparing piece-count to price across the LEGO Technic theme, this set scores 10.0 / 10 for value. That works out to about 6.6p per piece. That puts Deep-Sea Research Submarine in the top tier of Technic sets for raw build value — you're paying noticeably less per brick than the theme average. Compare against other contenders on our best-value LEGO sets page.