Skip to content
Back of the Box Builds

Back of the Box Builds

LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • BATMAN™
    • BIONICLE
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Pirates
    • Space
    • Star Wars
    • Technic
    • Train
    • Town
    • Universal Building Set
    • Western
    • More Sets
    • Misc
  • USEFUL LINKS
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Medium Builds 

4730 – Back B

January 23, 2024 Master Builder 4404 Views

From: 4730: The Chamber of Secrets
Name: TBD
Submitted by: USER
Instructions:

  • ← 4730 – Back A
  • 4730 – Back C →

You May Also Like

6679 – Back A

December 28, 2021December 28, 2021 Master Builder

6280 – Back C

July 13, 2021February 20, 2025 Master Builder

6534 – Back C

July 8, 2022July 8, 2022 Master Builder

6452 – Back B

October 3, 2024October 3, 2024 Master Builder

550-2 – Back D

March 3, 2026March 3, 2026 Master Builder

6552 – Back C

May 7, 2024May 11, 2024 Master Builder

EXPLORE MORE OFFICIAL SETS

1665: Duel FX Racers
Official Sets Small Builds Town Town Sets 

1665: Duel FX Racers

April 30, 2024April 30, 2024 Master Builder

Year Released: 1990BricklinkInstructions

7043: Firefighter
Fire Official Sets Small Builds Town Town Sets World City 

7043: Firefighter

January 22, 2024January 22, 2024 Master Builder
1967: System Bonus Pack
Bonus/Value Packs Classic Space Classic Space Sets Duplicate Set Number Official Sets Small Builds Space 

1967: System Bonus Pack

February 13, 2025February 13, 2025 Master Builder
6581: Dig N’ Dump
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6581: Dig N’ Dump

November 7, 2022November 7, 2022 Master Builder
6713: Grip-n-Go Challenge
Large Builds Official Sets Race Town Town Sets 

6713: Grip-n-Go Challenge

February 10, 2025February 10, 2025 Master Builder
6422: Telephone Repair
Official Sets Town Town Jr Town Sets Traffic Very Small Builds 

6422: Telephone Repair

July 28, 2020July 28, 2020 Master Builder
6951: Robot Command Center
Classic Space Classic Space Sets Large Builds Official Sets 

6951: Robot Command Center

September 21, 2019September 28, 2019 Master Builder
6892: Modular Space Transport
ABCs Classic Space Classic Space Sets Medium Builds Official Sets Space 

6892: Modular Space Transport

November 17, 2021July 31, 2023 Master Builder
7725: Electric Passenger Train
12V Large Builds Official Sets Town Train Train Sets 

7725: Electric Passenger Train

December 29, 2021July 26, 2022 Master Builder
6698: RV with Speedboat
Classic Town Harbor Medium Builds Official Sets Town Town Sets Wrecker 

6698: RV with Speedboat

June 28, 2022June 28, 2022 Master Builder
6352: Cargomaster Crane
ABCs Classic Town Construction Medium Builds Official Sets Town Town Sets 

6352: Cargomaster Crane

June 4, 2023February 12, 2025 Master Builder
6930: Space Supply Station
Classic Space Classic Space Sets Medium Builds Official Sets 

6930: Space Supply Station

September 13, 2019September 11, 2023 Master Builder
1794 – Side R
Bonus/Value Packs Castle Castle Alternate Builds Dragon Knights Official Sets Small Builds 

1794 – Side R

March 30, 2026March 30, 2026 Master Builder
6057: Sea Serpent
Black Knights Castle Castle Sets Medium Builds Official Sets 

6057: Sea Serpent

April 14, 2025April 14, 2025 Master Builder
358: Rocket Base
LEGOLAND Medium Builds Official Sets Space 

358: Rocket Base

March 5, 2026March 5, 2026 Master Builder
1760: Go-Cart
Classic Town Official Sets Race Town Town Sets Very Small Builds 

1760: Go-Cart

April 11, 2023April 11, 2023 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
There were once pictures of additional LEGO® builds on the back of set boxes. Written on the boxes was typically something about the endless building possibilities, "Build any of these exciting models with this set!" There were no instructions for these alternate builds, until now.

Sets

  • Adventurers
  • Aquazone
  • BATMAN
  • Bionicle
  • Belville
  • Building Set with People
  • Castle
  • Duplo
  • Fabuland
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Pirates
  • Space
  • Star Wars
  • Technic
  • Train
  • Town
  • Universal Building Set
  • Western
  • More Sets
  • Misc

Useful Links

  • Submit Instructions!
  • New Instructions
  • New Official Sets
  • New Alternate Builds
  • Minifigs
  • Very Small Builds (<35 pcs)
  • Small Builds (<100 pcs)
  • Medium Builds (<200 pcs)
  • Large Builds (<400 pcs)
  • Extra Large Builds (>400 pcs)
  • How BOTBB was Built

In Honor of 1526

The classic space set that never was.

Copyright © 2026 Back of the Box Builds. All rights reserved. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize, or endorse this site.