LEGO Harry Potter: Years 1-4 Walkthrough – Guide To Diagon Alley

Published on July 1st, 2010

The Leaky Cauldron acts as the main hub from where you’ll explore the world of , but just outside is , the place where you should head if you’re after anything wizard related.


This is where all your hard work collecting studs will pay off. You can purchase unlocked spells here providing you’ve collected enough studs and you can view all current unlocked spells.

This is also where you can access cheat codes. Head to the upper floor and speak to the salesman. Enter the following codes to yield the rewards.. The Hogwart’s Crest detector is an excellent cheat!

AUC8EH Carrot Wands
H27KGC Character Studs
HA79V8 Character Token Detector
T7PVVN Christmas
4DMK2R Disguise
J9U6Z9 Extra Hearts
ZEX7MV Fall Rescue
Z9BFAD Fast Dig
FA3GQA Fast Magic
84QNQN Gold Brick Detector
TTMC6D Hogwarts Crest Detector
F88VUW Ice Rink
QQWC6B Invincibility
7AD7HE Red Brick Detector
89ML2W Regenerate Hearts
H8X69Y Score x10
74YKR7 Score x2
J3WHNK Score x4
XK9ANE Score x6
HUFV2H Score x8
HZBVX7 Silhouttes
BMEU6X Singing Mandrake
67FKWZ Stud Magnet


Collect Red Bricks in Hogwarts and you’ll be able to purchase Red Brick extras, such as stud multipliers. Bricks are delivered automatically to the Owl Emporium by Owl post. You must post red bricks yourself. Just walk up to red brick and pick it up with B or Circle and then go to an owl perch to send it.

To make life easier, you can use the code upstairs at WISEACRE’S WIZARDING EQUIPMENT to unlock the Red Brick Detector — Enter: 7AD7HE


This is where you can customise your characters. You’ll gain access to Character Tokens throughout the game. You can head to this shop and purchase these characters providing you’ve collected enough studs. You can then walk into a wardrobe where you’ll be able to accessories your character.


You’ll access Gringotts Bank early on to partake in a quest with Hagrid and Harry. You can return here to unlock vaults, but you’ll have to build the doors with golden bricks that you collect in the game. The more Gold bricks you collect the more doors you’ll be able to build. Once a door is built you can enter it and use a Portkey to get transported to a builder level.

Complete the objective and you’ll unlock a LEGO object which you can then use to build your own structures!

We’ll be adding to our LEGO Harry Potter guide over the coming weeks, so be sure to check out the main Harry Potter page for more information and to continue the walkthrough

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    LEGO Harry Potter: Years 1 4 Walkthrough   Guide To Diagon Alley

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    1. Posted by Chris on July 30th, 2010, 22:27

      Can’t get up the grand staircase to Dumbledore’s office. Could in story mode, but not when I went back. Can anyone help?

    2. Posted by Andy on September 10th, 2010, 08:39

      You must switch the spell to Leviosa, then lift-up the stairs. If you can’t, seems to me yourr game is buged.

    3. Posted by cindy on October 4th, 2010, 16:53

      I’m 99.6% finished and cannot find the last red brick. Obviously I’ve missed it, Regenerating Hearts, but have been back to all rooms and cannot find it. Anyone know where it is?

    4. Posted by cindy on October 4th, 2010, 22:22

      Sorry – talking about Lego Harry Potter yrs 1-4

      • Posted by Jess on March 19th, 2011, 21:15

        Have you found out the room and how to do it cindy? Wouldnt mind a little help :p

    5. Posted by Anthony on February 5th, 2011, 12:24

      I can’t seem to get into the wizerding supplies shop, how do I get in?!

    6. Posted by Jess on March 19th, 2011, 21:13

      Same with cindys problem, I’ve 19/20 red bricks, last one is the regen hearts. The room it’s pointed to seems to have cogs and a small lift type thing. I’ve done everything I can see to do so I’m confused on what to do next. I heard there’s a glitch on this room? I’ve completed the game, have around 140/160? Characters unlocked so am very open to any ideas. Have tried looking on sites, but they don’t seem to go into slot of detail. I’ll keep looking around sites, but for now I’m hoping anybody can help. Thanks :)

    7. Posted by Natasha on October 14th, 2012, 16:38

      I can’t get out of Diagon alley!! Help please?

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