How to organise and track a LEGO collection

Start with the decisions your catalogue needs to support

Before entering every set you own, decide what the finished catalogue should help you do. Most collectors want to avoid duplicate purchases, find a particular model or minifigure, plan display space, share gift ideas, or choose the next build from a backlog. Those needs determine which details are worth recording.

A minimal entry needs only the set, quantity and whether it is owned or wanted. Add condition if you distinguish sealed sets from opened or built ones. Record storage location only when your collection is spread across several boxes, cupboards or rooms. A smaller, consistently maintained catalogue is more useful than a perfect one that is abandoned halfway through.

1. Take a quick inventory

Work through one physical area at a time rather than trying to remember the whole collection. A shelf, storage box or room gives you a clear boundary and an obvious stopping point. Add every set from that area, then move on.

• Separate sets you own from sets you merely want.
• Record duplicates as a quantity instead of creating inconsistent entries.
• Choose simple condition labels you will use every time, such as sealed, complete, incomplete or built.
• Catalogue identifiable minifigures separately if they are an important part of your collection.

2. Use categories that match how you collect

Theme, ownership status and build status are more durable than a complicated set of custom tags. They also match the questions collectors tend to ask: “Which sets from this theme am I missing?” or “Which large set should I build next?”

If you aim to complete a theme, mark sets as owned, wanted or intentionally ignored. The last category matters: a completion percentage is only motivating when it reflects your actual collecting goal, not every product ever released under a theme name.

3. Keep a separate LEGO wishlist

Mixing wanted and owned sets creates uncertainty when you check your catalogue in a shop or compare a new listing with your collection. A dedicated wishlist keeps the distinction clear and is easier to share when somebody asks what you would like for a birthday or holiday.

Review the wishlist occasionally. Remove sets that no longer interest you, and move purchases into the collection rather than entering them again. This keeps the list useful instead of turning it into an archive of every set that once caught your eye.

4. Track a building backlog separately from ownership

Owning a set and building it are different stages. For collectors with several unopened or partly built sets, a build status makes the backlog manageable. A simple flow is enough:

1. Not started: owned and waiting to be built.
2. In progress: an active build that may span several sessions.
3. Built: completed, whether currently displayed or stored.

For larger models, recording individual sessions can make it easier to resume after a break and gives you a more realistic picture of total build time. Treat the figures as a record of enjoyment, not a target to rush.

5. Match the digital catalogue to physical storage

A collection tracker tells you what exists; a simple location system tells you where to find it. Give shelves, drawers or boxes short, stable names such as “Study shelf 2” or “Box A4”. Put the same label on the physical container and in your catalogue.

Avoid descriptions such as “under the other boxes” that will stop being true when storage changes. When you move several sets, update one location group at a time. Photographing a box before closing it can also help with loose parts, although the catalogue should remain the reliable source of truth.

Choose a tracker you will actually maintain

A spreadsheet can be a good starting point if you enjoy designing your own system. A dedicated LEGO collection app is faster when you want set-focused search, wishlists, minifigure records and build tracking together. Whichever method you choose, check that you can get your data back out if your collection becomes important to you.

BrickDisplay is designed around this low-maintenance approach. The free version covers set and minifigure management, condition, quantity, search and wishlists without requiring an account. BrickDisplay Pro adds collection goals, import and export, build sessions and deeper statistics.

A routine that keeps the catalogue accurate

The best time to update a collection is when something changes. Add a set when it arrives, move it from the wishlist immediately, and update its build status after a session. A five-minute review every few months is usually enough to catch gifts, duplicates or storage moves that slipped through.

The goal is not to document every interaction with the hobby. It is to make the collection easier to enjoy: fewer accidental duplicates, less searching through boxes, a clearer wishlist and a backlog that feels inviting rather than forgotten.