Property Development in OpenConstructionERP

Lifecycle

Lead → Feasibility → Design → SPA (sale) → Construction → Handover

Stage	What the platform does
Lead	land/opportunity record, key metrics
Feasibility	rough budget from CWICR cost bases (m² rates), margin check
Design	BIM model, BOQ, detailed estimate
SPA	sale/presale tracking, payment milestones
Construction	BOQ + schedule + field modules (see oce-field-ops)
Handover	closeout report, as-built docs, punch closeout

Feasibility estimation

Use cost-base intensity rates (per m²) from a loaded base:

# rough budget: GFA × regional m² rate from CWICR items
gfa_m2 = 12_000
m2_rate = 1_050  # TRY/m², from cost-base roll-ups for residential
budget = gfa_m2 * m2_rate

Then refine with a real BOQ as design progresses. Early-phase estimates carry ±30% — label them.

Sales & SPA

• Track units, price lists, sold/reserved/available.
• Payment milestones tied to construction progress (SPA installments).
• Cash-flow: sales inflow vs construction outflow over the schedule.

Handover

• Punch-list closeout (see oce-field-ops).
• As-built package: final BOQ, models, docs, warranties.
• Defect liability tracking post-handover.

Best practices

1. Keep feasibility numbers honest — they set the land price.
2. Tie SPA milestones to construction gates, not calendar guesses.
3. One project currency for the development; report to investors in their currency separately.
4. Retain the as-built package in the project record — it is the warranty baseline.