# Seattle Park District Opengov #OPCD-RFP-PC026-026

Seattle affordable-housing nexus study for Mandatory Housing Affordability requirements

**Posted:** November 02, 2026
**Respond By:** November 11, 2026
**Identifier:** OPCD-RFP-PC026-026
**NAICS:** 541720

The City of Seattle is seeking a consultant to study affordable-housing demand and inform Mandatory Housing Affordability requirements.
- **Government buyer:** City of Seattle, Office of Planning & Community Development (OPCD), coordinating with the Office of Housing and the Mayor’s Office.
- **Requested service:** One affordable-housing nexus study, including market and affordability analysis for rental and for-sale housing.
- **Scope:** Analyze up to four market-strength areas and six to eight residential development prototypes, using up to two AMI ranges.
  - Estimate affordable-housing demand, on-site performance requirements, and per-square-foot in-lieu fees; the analysis may produce up to 64 estimates.
  - Rental income ranges may not exceed 60% AMI; ownership ranges may not exceed 100% AMI.
- **Modeling:** Use an aggregate economic model such as **IMPLAN** or a similar model. IMPLAN is the only named product/vendor; no consultant firms are identified.
- **Deliverables and experience:** A concise report with findings, recommendations, and calculation tables. Consultants must have completed an affordable-housing nexus study for another municipality within the prior 10 years.
- **Timing:** The City anticipates contract execution before year-end and initial results the following spring; the overall duration and end date are unspecified.

### Description

The City of Seattle is seeking proposals for an affordable housing nexus study to inform updates to its Mandatory Housing Affordability requirements. The study will estimate affordable-housing demand generated by selected market-rate residential development prototypes, including analysis of housing costs and affordability, multiple development prototypes, market-strength areas, and associated on-site performance requirements and in-lieu fees. Work also includes project kickoff and coordination, and a concise report documenting findings, recommendations, and calculations. Proposals are due November 10, 2026, at 5:00 p.m. Pacific Time, through the Seattle e-Procurement Portal.

[View original listing](https://procurement.opengov.com/portal/seattle/projects/322116)