Glossary

Relationship to the Master Plan Update

Context
Continuity
Gaps Addressed
Coordination Risks

Where the Housing Action Plan fits

Portsmouth's 2017 Master Plan identified housing as a priority across multiple themes — Diverse, Vibrant, and Resilient — but its action items were never consolidated into an implementation framework. The Housing Action Plan was developed to close that gap.

The city is currently engaged in a new Master Plan update (anticipated 2026–27). The Housing Action Plan is intentionally designed to feed into that process: it provides a tested, evidence-based inventory of housing strategies that the Master Plan update can formalize, prioritize, and adopt.

"Implementation of the Master Plan's housing goals will be advanced in substantial part through the Portsmouth Housing Action Plan, a Council-adopted policy document targeted for adoption in July 2026. The Housing Action Plan provides the detailed action framework — including specific zoning amendments, financial incentives, affordability targets, and accountability mechanisms — that the Master Plan's housing goals require."

Intended relationship

  • The Housing Action Plan does not replace the Master Plan — it operationalizes its housing chapter
  • Items in this Explorer trace directly to 2017 Master Plan actions where applicable (see Sources field on each card)
  • Not all Housing Action Plan items will be implemented immediately — a triage and prioritization process will identify the subset of actions to advance during the current Council term
  • The Master Plan's housing recommendations should be understood as consistent with, and reinforced by, the Housing Action Plan rather than as a parallel or alternative framework

Drawing from sidelined knowledge

Many Housing Action Plan items represent direct continuity with findings and recommendations that were documented in the 2017 Master Plan but never acted upon. In cataloguing these connections, the Housing Action Plan serves as an updated, unified implementation source — not a new direction, but a recovery of existing institutional knowledge.

As of v2.9, 26 Housing Action Plan items carry explicit attribution to specific 2017 Master Plan actions in their Sources field. An additional 5 items (Z-37, Z-15, Z-33, P-5, Z-21) have been updated to reflect the draft Portsmouth Master Plan Update (Utile, March 2026), aligning the Housing Action Plan with the Master Plan's Gateway Neighborhood Center study area framework, SRB district staging recommendations, and design guideline reform direction.

The Master Plan update is an opportunity to formally close the loop: adopting a Housing Action Plan that the new Master Plan can reference as its housing implementation framework — an explicit acknowledgment that the Council's decision to create the Housing Action Plan was the right response to the pace problem the Master Plan cycle represents.

2017 Master Plan items now addressed in the Housing Action Plan

  • 1.1.1 Reinvestment in underutilized buildings and land — Z-29, I-4, PL-1
  • 1.2.1 Mixed-use development / Gateway PD options — Z-1, Z-11, Z-28
  • 1.2.2 Route 1 Bypass redevelopment — Z-15
  • 2.1.2 Architectural design standards — P-5
  • 2.1.3 Residential zoning integrity — Z-8, Z-33, Z-37
  • 3.1.2 CDBG rehabilitation programs — I-14
  • 3.1.4 Live/work unit zoning — Z-14
  • 3.2.1 Streamline affordable housing approvals — P-1, I-3
  • 3.2.2 Mixed-income multifamily with parking/height incentives — Z-5, Z-6, Z-7, Z-12, Z-25
  • 3.2.3 Funding for special populations — SP-1 through SP-6, PC-9
  • 3.2.4 First-time homebuyer education and incentives — I-12, I-21, EO-9
  • 3.2.5 Micro-units — Z-20
  • 3.2.7 PHA mixed-use redevelopment — PL-4, PC-8
  • 4.3.2–4.3.4 Parking study and reform — Z-4, IS-2
  • 5.1.1 / 5.1.3 Sustainable building and stormwater — CS-1, CS-2, CS-3
  • 5.5.1 Sea level rise in adaptation planning — CS-3

See the Sources field on individual items for full attribution. One 2017 item — 5.4.7 (LEED-ND in neighborhood planning) — has no direct Housing Action Plan analog and may warrant consideration in the Master Plan update.

Risks if the two documents are not explicitly coordinated

  • Timeline drift: Housing Action Plan adoption is July 2026; Master Plan completion is early 2027. Without an explicit link, overlapping items risk being deferred pending the Master Plan — delaying actions the Council has already committed to.
  • Scope absorption: A zoning modernization consultant scoped to the Master Plan but not the Housing Action Plan may reinvent Housing Action Plan zoning items rather than execute them, adding time and cost.
  • Public confusion: Residents will encounter housing recommendations from both documents simultaneously — without guidance on how they relate, who is accountable, or on what timeline.
  • Weakened Council commitment: The Housing Action Plan exists precisely because the Master Plan cycle was too slow. Connecting the two documents acknowledges that decision and strengthens both.

Progress Portsmouth has requested that the Master Plan's housing section include explicit language establishing this relationship before the April 22, 2026 Public Open House — the last practical insertion point before the plan enters broad public circulation.

Sources & Reference Materials

Foundation documents — Portsmouth
LocalPortsmouth Master Plan Update, Draft Framework — Planning Board presentation, Mar 26, 2026 (Utile/City of Portsmouth); basis for v2.9 alignments to Z-37, Z-15, Z-33, P-5, Z-21
LocalPortsmouth 2017 Master Plan — Housing & Land Use chapters (Actions 1.1–5.5)
LocalCity Council Housing Policy 2016-01 (Perkins, Dec 2016) — Master Plan Strategy attachment
LocalPortsmouth Housing Committee Work Plan 2024–25
LocalRKG Associates Housing Needs Assessment, 2022
LocalPlaces to Live Dialogue — community engagement record, 2024
LocalBlue Ribbon Committee on Housing, 2016
LocalPortsmouth Planning Board — HAP presentations, Feb–Mar 2026
GISByron Matto GIS parcel analysis (Jan 2026) — zoning yield estimates, SRB district buildout, parcel-level housing capacity modeling; underlies all high/medium confidence yield figures in this Explorer
Comparable plans
NHKeene Housing Action Plan
MESouth Portland Housing Production Plan
WABurien Housing Action Plan
State law & guidance
NH RSAHB 577 (2025) — ADU reform, amending RSA 674:71–73; eff. 7/1/25
NH RSAHB 631 (2025) — Multifamily on commercial land; adaptive reuse exemptions; eff. 7/1/26
NH RSASB 284 (2025) — Residential parking cap (1 space/unit max); eff. 9/13/25
NH RSASB 283 (2025) — Below-grade FAR exclusion; eff. ~Nov 2025
NH RSAHB 457 (2025) — Occupancy restriction limits; eff. 9/13/25
NH RSASB 282 (2025) — Single-stairway buildings up to 4 floors; eff. 9/13/25
NH RSARSA 79-E — Community Revitalization Tax Relief Incentive
NH RSARSA 672:1, III-e — Prohibition on unreasonable discouragement of affordable housing through zoning powers
NH RSARSA 676:3,I (amended Aug 2022) — Written findings of fact required for all land use board disapprovals; failure to provide is grounds for automatic reversal on appeal
NH RSARSA 674:58–61 — Workforce Housing statute
NH CaseRichmond Co. v. City of Concord, 149 N.H. 312 (2003) — Established constitutional duty of planning boards to assist citizens; land use process is not adversarial
NH CaseAppeal of Town of Windham, NH Supreme Court No. 2021-0473 (2022) — Boards may not use dilatory tactics or shift burden to applicant in ways that unreasonably discourage housing
NH CaseDartmouth v. Hanover (2018) — Boards may not rely on lay opinion or personal views to override uncontroverted expert evidence or specific ordinance criteria
NHMAStephen C. Buckley, Planning Board Basics — 2024 Spring Planning and Zoning Conference (NH Office of Planning & Development)
NHMAChanges to Planning & Zoning Laws in 2025 (Revised Aug 13, 2025)
NHMARevised Law on Accessory Dwelling Units — 2025 Edition (Aug 12, 2025)
NH HousingMunicipal Guide to RSA 79-E — Portsmouth City Council presentation, Mar 2026 (Wrightsman)
National research
AEIAEI Housing Supply Accelerator — reform framework and benchmarking
ResearchIvory Innovations Housing Affordability Index
NHFANH Housing Finance Authority — workforce housing data and reports
NZANational Zoning Atlas — NH coverage by Saint Anselm College (data frozen Jun 1, 2024)