standard tier · 72 briefs · 1,368 runs · results db2e24e

CityFormGen

Generative and optimisation methods for middle housing, compared under matched compute

RESEARCH GENERATIVE-DESIGN BENCHMARK - NOT CONSTRUCTION DOCUMENTATION OR CODE CERTIFICATION.

B0029 · circulation-optimal · seed 1

B0029-heuristic_nsga2-1-1142

Heuristic-seeded NSGA-IIA+D · meets all 17 benchmark constraints. Brief B0029

Plan drawing of a triplex on a 14.1 by 21.5 metre lot, 2 storeys, 3 dwellings, 17 rooms. Dwelling U0 (studio) has 4 rooms totalling 34 square metres. Dwelling U1 (1BR) has 5 rooms totalling 50 square metres. Dwelling U2 (2BR) has 6 rooms totalling 85 square metres. Building footprint 94 square metres; open space 210 square metres. This design satisfies every benchmark hard constraint. Objective scores, higher is better: density 0.59, daylight 0.46, privacy 0.76, circulation 0.71, carbon 0.73, cost 0.15.
B0029 · heuristic_nsga2 · seed 1scale bar 5 m · north arrow top right✓ FEASIBLE

Plan drawing of a triplex on a 14.1 by 21.5 metre lot, 2 storeys, 3 dwellings, 17 rooms. Dwelling U0 (studio) has 4 rooms totalling 34 square metres. Dwelling U1 (1BR) has 5 rooms totalling 50 square metres. Dwelling U2 (2BR) has 6 rooms totalling 85 square metres. Building footprint 94 square metres; open space 210 square metres. This design satisfies every benchmark hard constraint. Objective scores, higher is better: density 0.59, daylight 0.46, privacy 0.76, circulation 0.71, carbon 0.73, cost 0.15.

Objective vector

Proxy scores in [0, 1], higher is better. Kept as a vector; there is no overall score.

density
0.588
daylight
0.462
privacy
0.758
circulation
0.707
carbon
0.728
cost
0.150

Reported quantities

FAR proxy (GFA / lot)
0.62
site utilisation
0.732
gross floor area, m²
187.1
footprint, m²
93.5
carbon proxy, kgCO₂e/m² (A1–A3)
358
cost index / m² (unitless)
3.07
worst habitable room, daylight
0.248
circulation share of GFA
14%
open space, net of parking
64%
courtyard void, m²
0.0
plumbing stacks
4
footprint corners
4
preferred adjacencies met
0%

Benchmark constraints

Benchmark rules, not building code.

  • C01geometry valid passed
  • C02no overlap passed
  • C03within buildable passed
  • C04min room area passed
  • C05min room dimension passed
  • C06max room aspect passed
  • C07min unit area passed
  • C08unit connectivity passed
  • C09street access passed
  • C10habitable daylight passed
  • C11required adjacency passed
  • C12forbidden door passed
  • C13open space passed
  • C14courtyard provision passed
  • C15programme complete passed
  • C16unit contiguity passed
  • C17vertical support passed

Dwellings and rooms

DwellingTypeArea m²Rooms
U0studio34.44
U11BR50.45
U22BR84.86
All 17 rooms
RoomTypeDwellingStoreyw × h m
CORE@0shared circulationshared08.77.25 × 1.20
CORE@1shared circulationshared18.77.25 × 1.20
U1@0#2kitchenU107.23.90 × 1.85
U1@0#3bathroomU103.61.95 × 1.85
U1@0#0entryU102.61.40 × 1.85
U1@0#4bedroom primaryU1014.02.75 × 5.10
U1@0#1livingU1022.94.50 × 5.10
U0@0#3bathroomU004.82.60 × 1.85
U0@0#0entryU002.71.45 × 1.85
U0@0#2kitchenU005.93.20 × 1.85
U0@0#1livingU0021.07.25 × 2.90
U2@1#2kitchenU2110.13.20 × 3.15
U2@1#0entryU213.91.25 × 3.15
U2@1#3bathroomU218.82.80 × 3.15
U2@1#1livingU2139.97.25 × 5.50
U2@1#4bedroom primaryU2114.34.70 × 3.05
U2@1#5bedroom secondaryU217.82.55 × 3.05

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