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Affordable Housing Typology Optimizer

Urban Presets:
Footprint: 12,000 sq ft
Architectural Cross-Section & Solar Daylight Envelope Daylight Compliance: 88%
Building Height 6 Floors
Structural System
Solar Angle (Sun Path) 42°
Amenity & Community Ratio 15%
Typology Yield Summary High Efficiency
TOTAL UNITS
64
TOTAL GROSS AREA
51.2k sq ft
EST. COST / SQFT
$320
COST PER UNIT
$256.0k
Daylight Access Compliance 88%
Structural Framing Comparison
System Speed Carbon $/sqft
Mass Timber +25% -40% $320
Modular Steel +40% -15% $295
Precast Concrete Baseline +10% $275
Unit Mix Distribution
Studio (25%)
1-Bed (45%)
2-Bed (30%)
Studio / 1BR / 2BR Balance
Pro-Forma Subsidy Indicator
Calculated for 100% AMI affordable housing yield. Estimated development budget: $16.38M.
Target Subsidy Requirement / Unit $42,000

A drawing-based housing sketch uses explicit scale and proxy assumptions

Read the explanation

The saved sketch sums rectangle width times height, subtracts lightwell rectangles, multiplies by zero point two five and then by one hundred twenty. Its initial two blocks total forty six thousand four hundred coordinate squares, and the lightwell removes sixteen hundred, leaving forty four thousand eight hundred. Multiplying by thirty gives one million three hundred forty four thousand labeled square feet. At zero point zero zero zero one pixels per labeled square foot the result bar measures one hundred thirty four point four. The selected site area is eighteen thousand, shown as a one point eight pixel comparison. The metric function does not use that selected site area to cap the footprint. This large mismatch is source behavior rather than a physically validated building design. Total area multiplies the converted footprint by floor count and by one minus amenity ratio times zero point four. At the selected fifteen percent amenity ratio, that final multiplier is zero point nine four, not zero point eight five. For an illustrative ten thousand unit footprint over six floors, the pre-amenity quantity is sixty thousand and the reduced quantity fifty six thousand four hundred. At zero point zero zero four pixels per quantity unit the bars measure two hundred forty and two hundred twenty five point six. Unit yield then rounds eighty percent of this area divided by seven hundred twenty, with a minimum twelve units. This is a drawing heuristic rather than a zoning or occupancy calculation. The daylight percentage starts at eighty five, adds half the solar angle minus forty, and subtracts three times floors minus six. At angle forty two and six floors the label is eighty six. At the same angle and ten floors it becomes seventy four. At three pixels per displayed point, those bars measure two hundred fifty eight and two hundred twenty two. The label is bounded between forty five and ninety eight. This formula does not trace sunlight through the drawn lightwells. The downloaded JSON includes selected parameters and calculated results, but omits block and lightwell geometry. It cannot reconstruct the drawing, establish daylight compliance or provide a financial feasibility guarantee.

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