1. Sets
  2. 1975
  3. Duplo
  4. Building Sets

LEGO 1975 / Duplo / Building Sets Sets

In 1975, LEGO released 6 Duplo Building Sets sets, all of these sets have been retired. For that year, the total price of all retail sets cost $13, today those sets are valued around $40.
Most valuable 1975 LEGO Duplo Building Sets set
517 Bricks and Half Bricks And Arches $40.00
Largest 1975 LEGO Duplo Building Sets set
521-8 Bricks and Half Bricks All Colors 640 pieces
Most owned 1975 Duplo Building Sets set
520-9 Bricks and Half Bricks And Two Tolleys
6 sets

516 Bricks and Half Bricks

Theme / Subtheme Duplo / Building Sets
Year 1975
Pieces 20
Availability Retired
516 LEGO Duplo Bricks and Half Bricks
Retail $1.25

517 Bricks and Half Bricks And Arches

Theme / Subtheme Duplo / Building Sets
Year 1975
Pieces 121
Availability Retired
517 LEGO Duplo Bricks and Half Bricks And Arches
Retail $1.49
Value $40.00
Growth  +2584.6%
Annual growth 4.9%

518-8 Bricks and Half Bricks And Trolley

Theme / Subtheme Duplo / Building Sets
Year 1975
Pieces 17
Availability Retired
518-8 LEGO Duplo Bricks and Half Bricks And Trolley
Retail $1.49

519-8 Bricks and Half Bricks And Arches and Trolley

Theme / Subtheme Duplo / Building Sets
Year 1975
Pieces 240
Availability Retired
519-8 LEGO Duplo Bricks and Half Bricks And Arches and Trolley
Retail $2.25

520-9 Bricks and Half Bricks And Two Tolleys

Theme / Subtheme Duplo / Building Sets
Year 1975
Pieces 168
Availability Retired
520-9 LEGO Duplo Bricks and Half Bricks And Two Tolleys
Retail $2.89

521-8 Bricks and Half Bricks All Colors

Theme / Subtheme Duplo / Building Sets
Year 1975
Pieces 640
Availability Retired
521-8 LEGO Duplo Bricks and Half Bricks All Colors
Retail $3.99

Year Pricing

Retail
$13.36   (for all 6 sets)
New/Sealed
Value
~$40.00
Used
Value
$24.85

Community Stats

The following are the top 6 most owned 1975 Duplo Building Sets sets by LEGO collectors.
#1Bricks and Half Bricks And Two Tolleys
#2Bricks and Half Bricks And Arches
#3Bricks and Half Bricks All Colors
#4Bricks and Half Bricks
#5Bricks and Half Bricks And Arches and Trolley
#6Bricks and Half Bricks And Trolley

About LEGO Duplo Building Sets

LEGO Duplo Building Sets consists of basic brick assortments designed for young children, featuring large, easy-to-handle pieces that encourage creativity and free play. These sets provide a foundation for early building skills with a variety of colorful bricks, doors, windows, and figures, allowing for open-ended construction. Aimed at preschoolers, the theme emphasizes simple stacking, imaginative play, and hands-on learning, making it a staple in the Duplo lineup.
1975 LEGO Sets
1975 expanded Basic Building Sets and introduced more systematic, idea-led boxes. Proto-minifigures—small, faceless figures with single-piece legs—appeared in town and train sets, foreshadowing the 1978 minifigure. LEGOLAND-branded sets emphasized construction vehicles and realistic machinery, reinforcing everyday play before the arrival of dedicated Space and Castle themes.