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 Extra Large Builds Harry Potter Harry Potter Alternate Builds Instructions Added Sorcerer's Stone 

4709 – Back B

June 12, 2024June 17, 2024 Master Builder 4425 Views

From: 4709: Hogwarts Castle
Name: The Boathouse 1
Instructions: View PDF | Download .io File

Contributions

  1. Name, PDF and .io file submitted on June 12, 2024 by: penumbra12
  • ← 4709 – Back A
  • 4709 – Back C →

You May Also Like

6267 – Back A

October 11, 2021August 1, 2023 Master Builder

6673 – Back A

April 20, 2025April 21, 2025 Master Builder

4720 – Back A

June 14, 2026June 23, 2026 Master Builder

Book 6000 – Page 32-33

November 6, 2021January 22, 2022 Master Builder

6558 – Back D

December 29, 2021December 29, 2021 Master Builder

1558 – Back C

December 18, 2021December 18, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

6511: Rescue Runabout
Classic Town Fire Official Sets Town Town Sets Very Small Builds 

6511: Rescue Runabout

May 10, 2022May 10, 2022 Master Builder

Year Released: 1992BricklinkInstructions

6346: Shuttle Launching Crew
Airport Classic Town Large Builds Official Sets Town Town Sets 

6346: Shuttle Launching Crew

November 20, 2020August 10, 2026 Master Builder
6677: Motocross Racing
ABCs Official Sets Race Town Town Sets Very Small Builds 

6677: Motocross Racing

June 8, 2023July 31, 2023 Master Builder
6347: Monorail Accessory Track
Classic Town Official Sets Supplemental Town 

6347: Monorail Accessory Track

August 27, 2023August 27, 2023 Master Builder
6289: Red Beard Runner
Extra Large Builds Official Sets Pirates Pirates I Pirates Sets 

6289: Red Beard Runner

July 13, 2021July 13, 2021 Master Builder
3721: Clive Crocodile on Skateboard
Fabuland Fabuland Sets Official Sets Very Small Builds 

3721: Clive Crocodile on Skateboard

February 26, 2023August 1, 2023 Master Builder
6764: Sheriff’s Lock-Up
Medium Builds Official Sets Western Western Sets 

6764: Sheriff’s Lock-Up

September 1, 2024September 1, 2024 Master Builder
6503: Sprint Racer
Official Sets Race Town Town Sets Very Small Builds 

6503: Sprint Racer

July 9, 2022July 9, 2022 Master Builder
2161: Aqua Dozer
Aquaraiders I Aquazone Aquazone Sets Large Builds Official Sets 

2161: Aqua Dozer

January 8, 2020April 4, 2020 Master Builder
6071: Forestmen’s Crossing
Box Marketing Blurb Castle Castle Sets Forestmen Medium Builds Official Sets 

6071: Forestmen’s Crossing

October 23, 2019April 3, 2024 Master Builder
4751: Harry and the Marauder’s Map
Harry Potter Harry Potter Sets Official Sets Prisoner of Azkaban Small Builds 

4751: Harry and the Marauder’s Map

May 16, 2023May 16, 2023 Master Builder
4150: FreeStyle Building Set
Box Plus FreeStyle FreeStyle Official Sets Official Sets Poster Small Builds 

4150: FreeStyle Building Set

December 17, 2025December 17, 2025 Master Builder
4582: Red Bullet
Drome Racers Official Sets Racers Very Small Builds 

4582: Red Bullet

October 23, 2021February 21, 2025 Master Builder
6851: Tri-Wheeled Tyrax
ABCs Blacktron II Blacktron II Sets Official Sets Very Small Builds 

6851: Tri-Wheeled Tyrax

October 24, 2019July 31, 2023 Master Builder
6901: Mobile Lab
Classic Space Classic Space Sets Medium Builds Official Sets Space 

6901: Mobile Lab

September 11, 2020August 4, 2023 Master Builder
1593: Super Model
Classic Space Classic Space Sets Large Builds Official Sets Space Super Model 

1593: Super Model

February 3, 2021March 18, 2024 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.