Factory consists of 8 sets that ran from 2005 to 2008. Most sets were released in 2008 which accounted for 3 sets. As of today, the average annual growth of sets in Factory is approximately 3.3% per year.
Most valuable LEGO Factory set
10190 Market Street $2,766.70
Largest LEGO Factory set
5526 Skyline 2,747 pieces
The Factory theme was introduced in 2005 and was powered by LEGO Digital Designer (LDD), a free LEGO virtual building program for the computer. Using the LDD people could design their own 3-D LEGO virtual model, and submit it for purchase using the LEGO Shop-at-home. The Factory platform was also designed to allow users to view and purchase other users custom creations. Once ordered, these Factory sets came in special packaging that showed the model as well as all included LEGO elements needed to build the design.

During Factory's beta phase, The LEGO Group sponsored a contest where people could submit their designs, in which 8,000 designs were submitted and people and LEGO Master Model Builders voted on the top models. Ten models were selected to become real LEGO sets available exclusively through LEGO Shop-at-Home.

In 2009, LEGO Factory was replaced by Design byME.
Theme / Subtheme Factory / Space
Year 2008
Pieces / Minifigs 956 / 4
Availability Retired
10192 LEGO Factory Space Skulls
Retail $99.99
Value $119.95
Growth  +20.0%
Annual growth 1.6%
Theme / Subtheme Factory / Space
Year 2008
Pieces / Minifigs 895 / 8
Availability Retired
10191 LEGO Factory Space Star Justice
Retail $99.99
Value $278.99
Growth  +179.0%
Annual growth 6.9%
Theme / Subtheme Factory / Custom Cars
Year 2008
Pieces / Minifigs 893 / 4
Availability Retired
10200 LEGO Factory Custom Car Garage
Retail $69.99
Value $135.71
Growth  +93.9%
Annual growth 3.2%
Theme / Subtheme Factory / Modular Buildings
Year 2007
Pieces / Minifigs 1,248 / 3
Availability Retired
10190 LEGO Factory Market Street
Retail $89.99
Value $2,766.70
Growth  +2974.5%
Annual growth 12.3%
Theme / Subtheme Factory / Trains
Year 2007
Pieces 1,080
Availability Retired
10183 LEGO Factory Hobby Trains
Retail $99.99
Value $483.19
Growth  +383.2%
Annual growth 7.2%
Theme Factory
Year 2005
Pieces 2,747
Availability Retired
5526 LEGO Factory Skyline
Retail $129.99
Value $540.16
Growth  +315.5%
Annual growth 5.1%
Theme Factory
Year 2005
Pieces 1,344
Availability Retired
5525 LEGO Factory Amusement Park
Retail $69.99
Value $107.14
Growth  +53.1%
Annual growth 3.0%
Theme Factory
Year 2005
Pieces 607
Availability Retired
5524 LEGO Factory Airport
Retail $39.99
Value $88.41
Growth  +121.1%
Annual growth 3.8%