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.

B0003 · carbon-optimal · seed 0

B0003-heuristic-0~r12

HeuristicA · meets all 17 benchmark constraints. Brief B0003

Plan drawing of a fourplex on a 15.0 by 24.2 metre lot, 2 storeys, 4 dwellings, 22 rooms. Dwelling U0 (studio) has 4 rooms totalling 87 square metres. Dwelling U1 (1BR) has 5 rooms totalling 61 square metres. Dwelling U2 (1BR) has 5 rooms totalling 61 square metres. Dwelling U3 (2BR) has 6 rooms totalling 87 square metres. Building footprint 180 square metres; open space 180 square metres. This design satisfies every benchmark hard constraint. Objective scores, higher is better: density 0.94, daylight 0.49, privacy 0.74, circulation 0.59, carbon 0.83, cost 0.63.
B0003 · heuristic · seed 0scale bar 5 m · north arrow top right✓ FEASIBLE

Plan drawing of a fourplex on a 15.0 by 24.2 metre lot, 2 storeys, 4 dwellings, 22 rooms. Dwelling U0 (studio) has 4 rooms totalling 87 square metres. Dwelling U1 (1BR) has 5 rooms totalling 61 square metres. Dwelling U2 (1BR) has 5 rooms totalling 61 square metres. Dwelling U3 (2BR) has 6 rooms totalling 87 square metres. Building footprint 180 square metres; open space 180 square metres. This design satisfies every benchmark hard constraint. Objective scores, higher is better: density 0.94, daylight 0.49, privacy 0.74, circulation 0.59, carbon 0.83, cost 0.63.

Objective vector

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

density
0.945
daylight
0.489
privacy
0.739
circulation
0.591
carbon
0.834
cost
0.633

Reported quantities

FAR proxy (GFA / lot)
0.99
site utilisation
0.964
gross floor area, m²
359.1
footprint, m²
179.5
carbon proxy, kgCO₂e/m² (A1–A3)
320
cost index / m² (unitless)
2.32
worst habitable room, daylight
0.185
circulation share of GFA
21%
open space, net of parking
42%
courtyard void, m²
0.0
plumbing stacks
3
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
U0studio86.64
U11BR60.95
U21BR60.95
U32BR86.66
All 22 rooms
RoomTypeDwellingStoreyw × h m
CORE@0shared circulationshared032.02.15 × 14.90
CORE@1shared circulationshared132.02.15 × 14.90
U1@0#2kitchenU106.32.00 × 3.15
U1@0#3bathroomU103.52.00 × 1.75
U1@0#0entryU102.52.00 × 1.25
U1@0#1livingU1019.43.15 × 6.15
U1@0#4bedroom primaryU1029.24.75 × 6.15
U0@0#0entryU003.02.05 × 1.45
U0@0#3bathroomU006.02.05 × 2.95
U0@0#2kitchenU008.92.05 × 4.35
U0@0#1livingU0068.77.85 × 8.75
U3@1#2kitchenU319.02.05 × 4.40
U3@1#3bathroomU316.02.05 × 2.95
U3@1#0entryU312.92.05 × 1.40
U3@1#1livingU3131.53.60 × 8.75
U3@1#4bedroom primaryU3112.54.25 × 2.95
U3@1#5bedroom secondaryU3124.64.25 × 5.80
U2@1#0entryU212.52.00 × 1.25
U2@1#3bathroomU213.52.00 × 1.75
U2@1#2kitchenU216.32.00 × 3.15
U2@1#1livingU2116.62.70 × 6.15
U2@1#4bedroom primaryU2132.05.20 × 6.15

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