Assembly Square

Assembly Square is the 20th anniversary modular building — 4,002 pieces across a three-section facade with ground-floor shops, residential apartments, and a rooftop garden. The build celebrates LEGO building craft with unusual technique cameos: a curved staircase, a jazz club, a dental office with functional chair, a bakery with oven. Each floor is a vignette, each room a miniature diorama. Expect 10–15 hours of building that rewards careful attention to each room.

The curved balcony railings on the second floor use a clip-and-bar arch construction that was innovative for its time and remains a referenced technique in AFOL communities. The interior room detail — cabinetry, furniture, functional props — is a showcase of compact scene-building within tight spatial constraints. Every room teaches a different interior detailing technique.

4,002 pieces across tan, dark red, medium azure, white, and dark green. The printed shopfront tiles and internal detail prints are unique to this set. The medium azure and tan facade elements are plentiful and distinctive. 14 minifigures across all three sections. A strong haul for any modular or architectural MOC work.

Modular standards are simply the finest display sets in all of LEGO — and Assembly Square, as the anniversary celebration, is the finest of the fine. The three-section facade, the rooftop garden, the period-accurate street lamps, the ground-floor detail visible through large windows — it's the standard against which all building sets are measured.

Retired in 2019, now consistently selling for –400 depending on condition. Used complete copies run –200. At those prices the value math depends on your intentions. For display: buy used complete, you won't regret it. For parts: better value sets exist. For the build experience alone: hunt a complete used set.