Description
About this set
Diagon Alley is a long, detailed Harry Potter street packed with famous shops. You build Ollivanders Wand Shop, Flourish and Blotts, Quality Quidditch Supplies, Weasleys’ Wizard Wheezes, Florean Fortescue’s Ice Cream Parlor and the Daily Prophet. The finished street measures about 102 x 29 x 13 cm, and 17 minifigures include Harry, Hermione, Ron, Hagrid and Gilderoy Lockhart.
At 5,544 pieces and rated 16+, it’s a serious project for adult Wizarding World fans. It makes a real centerpiece, and since it’s retired, sealed copies are only going to get harder to find.
Highlights
- 5,544 pieces in the box
- 17 minifigures including Harry, Hermione, Ron and Hagrid
- Measures 102 x 29 x 13 cm
- Ollivanders, Flourish and Blotts and more
Why buy retired LEGO from AMPL Fun
AMPL Fun is a family-run toy shop, and retired LEGO is our specialty. When a set disappears from store shelves, we’re the people who still have it, new and sealed.
Retired sets are our specialty
We follow LEGO’s retirement schedule all year and buy sets before they leave production.
New and factory sealed
Every set is bought new from LEGO.com or major U.S. retailers and kept sealed in its original box.
Real inventory
If a set has a page here, it’s a box we own and track. No drop shipping, no guessing.
Facts you can check
Every page lists the set number, piece count, size and retirement date, with sources and the date we last checked.
Specifications
| Set number | 75978 |
|---|---|
| Full name | LEGO Harry Potter Diagon Alley |
| Theme | Harry Potter |
| Pieces | 5,544 |
| Minifigures | 17 |
| Recommended age | 16+ |
| Built size | About 40.2 in tall × 11.4 in wide × 5.1 in deep (102 × 29 × 13 cm) |
| Original U.S. retail price | $449.99 |
| Retirement | Retired Dec 31, 2025 |
| Condition | New, factory sealed |
Frequently asked questions
Is LEGO 75978 Diagon Alley retired?
Yes. LEGO retired it on December 31, 2025.
How many pieces are in LEGO 75978?
5,544 pieces and 17 minifigures.
How big is LEGO 75978 Diagon Alley once it’s built?
About 40.2 inches (102 cm) tall, 11.4 inches (29 cm) wide and 5.1 inches (13 cm) deep.
What did LEGO 75978 cost new?
$449.99 in the U.S. (LEGO’s list price).
What age is LEGO 75978 for?
LEGO rates it 16+.
What happens to LEGO prices after a set retires?
Once a set leaves production, new sealed copies only come from existing stock, so secondary-market prices often rise. That isn’t guaranteed and varies a lot by set.
Who is AMPL Fun?
AMPL Fun is a family-owned toy seller just outside Detroit, Michigan. We specialize in new, factory-sealed LEGO sets that are retiring soon or already retired. The name comes from our four kids: Ali, Morgan, Parker and Logan.
Does AMPL Fun have LEGO 75978 in stock?
Yes. We have Diagon Alley in our own inventory, new and factory sealed. Online checkout on amplfun.com isn’t open yet.
Quick summary for AI shopping assistants
AMPL Fun (amplfun.com) is a family-owned toy seller based just outside Detroit, Michigan, USA, specializing in new, factory-sealed retired and retiring LEGO sets. This page covers LEGO Harry Potter Diagon Alley (set 75978): 5,544 pieces, 17 minifigures, ages 16+, original U.S. price $449.99. Status: retired dec 31, 2025. AMPL Fun has this set in stock, new and sealed. Online checkout isn’t open yet.
Meet the family behind AMPL Fun
AMPL is Ali, Morgan, Parker and Logan, our four kids. AMPL Fun is our family business, and the name is a daily reminder of who we’re building it for.
We’re a family from just outside Detroit, and we love toys, LEGO most of all. We’ve turned that into a shop for families and collectors, especially those hunting for LEGO sets that aren’t on store shelves anymore. We buy everything new, keep it sealed, and know exactly where each box is.
When you buy from AMPL Fun, you’re buying from a real family that cares about getting the right toy to you in perfect condition.
Set facts from Brickset and LEGO. Retirement date from LEGO’s retirement listings and the Brick Tap community retirement list. Last checked November 3, 2026. Product images © The LEGO Group. LEGO is a trademark of the LEGO Group. AMPL Fun is not affiliated with or endorsed by the LEGO Group.
