LEGO Flatiron Building (21023-1) is a 2015 set from the Architecture theme with 471 pieces.
Why collectors care
Flatiron Building (21023-1) is part of the LEGO collecting graph through Architecture from 2015, with 471 pcs. LEGO collectors usually browse by theme, set number, release era, and display value, so this page keeps those paths close.
Collector summary
Decide where this fits.
Flatiron Building is a lego collectible connected to LEGO and Architecture. Useful collector signals include release year 2015, set number 21023-1, and 471 pcs. Architecture has 51 catalogued releases on GrailHub, making this page a route into completion, variants, and nearby objects.
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Collector notes
Flatiron Building (21023-1) is a LEGO Architecture release from 2015 with 471 pcs. GrailHub tracks it as part of the LEGO collecting lane, where set number, theme, release year, piece count, and display appeal all help collectors understand how the set fits on a shelf.
LEGO collectors often browse by theme first, so this page links back into Architecture, LEGO, and related LEGO objects. Use those links to compare nearby releases, find other display sets, or move from a single set into the wider theme.
Related LEGO entries currently connected to this object include New York City – The Big Apple, Paris - City of Love, and Sagrada Família. These links make it easier to keep exploring without jumping back to a generic search page.
Series context
Architecture
Architecture groups related lego entries from LEGO, so collectors can move from this object into nearby releases instead of treating it as a standalone record.
- Catalogued here
- 51 objects
- Release span
- 2008-2026
Nearby in this lane
Collection tracking
Start tracking Architecture
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Owned
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Wanted
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Grails
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Complete
Quick facts
- Set number
- 21023-1
- Release year
- 2015
- Piece count
- 471 pcs
- Theme / series
- Architecture
- Brand
- LEGO
- Category
- LEGO
Market snapshot
BrickEconomy valuation
- Retail price
- $39.99
- New/sealed value
- $104.05
- Used value
- $60.12
- Annual growth
- 1.6%
- 12-month growth
- 0.8%
- 2-year forecast
- $114.72
- 5-year forecast
- $130.43
Market data from BrickEconomy · Last updated Jun 25, 2026
Market data is informational and may be incomplete. GrailHub is not a marketplace or appraisal service.
Lifecycle
Retired
Released
May 2, 2015
Retired
Dec 20, 2016
Availability
Retaillimited
Original retail prices
EAN
6900743189946
UPC
673419232180
Recent new/sealed events
Recent used events
Data source
- Source
- Rebrickable
- Source ID
- 21023-1
- Source URL
- View on Rebrickable
LEGO catalogue data provided by Rebrickable.
Related objects
More from Architecture
Continue through the collecting graph by theme, maker, and category.