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 Housing Committee Minutes — Apr 23, 2026 (City of Portsmouth); Planning Department staff comments on 26 shortlisted action items, basis for v2.16 staff_note field
LocalPortsmouth Housing Committee Minutes — May 21, 2026 (City of Portsmouth); member priority straw poll across 14 action items, Stith's "79-E bucket" and "Zoning Audit bucket" structural framing, basis for v2.18 committee_priority field. Full meeting summary at meeting-notes/2026-05-21-summary.md
LocalPortsmouth City Council Agenda — Monday, June 22, 2026, Item 15B (Cook): motion to direct Planning & Sustainability, with the Housing Committee and Planning Board, to review pre-approved ADU plans from other communities for possible local adoption. Cook memo references Mariposa County CA, Eugene OR, and Massachusetts ADU Design Challenge as precedents. Reflected in P-14 status_detail. Progress Portsmouth agenda preview at progressportsmouth.com/hubfs/digest_06_22_2026.html
LocalPortsmouth Housing Committee Meeting Notes — June 11, 2026 (City of Portsmouth Planning Department, DRAFT). Confirms the committee's citywide RSA 79-E direction (Housing Opportunity Zone overlay + office/commercial conversion + rehabilitation), the coastal-resilience set-aside, and the below-quorum staff-direction motion. Reconciled against the Progress Portsmouth working summary at meeting-notes/2026-06-11-summary.md; one attendance discrepancy flagged pending verification.
LocalHousing Action Plan — Implementation Matrix, June 30, 2026 (City of Portsmouth Planning Department, DRAFT). Nine numbered priorities with leads, timeframes, metrics, and milestones; basis for the June 30 matrix positions noted (provisional) in I-4, Z-1, Z-9, Z-10, Z-21, Z-25.
LocalHousing Action Plan — DRAFT for July 9, 2026 (City of Portsmouth Planning & Sustainability). Narrative plan as delivered to the Housing Committee; basis for provisional July 9 context across affected items. Superseded as the current text by the published July 2026 draft below.
LocalHousing Action Plan — published July 2026 draft (City of Portsmouth Planning & Sustainability). Nineteen actions: seven priority and twelve additional. Presented to the City Council July 13, 2026; referred to the Planning Board for August 20; two public hearings to follow, then Council. Narrative at portsmouthnh.gov/planportsmouth/housing/housing-action-plan. Not adopted.
LocalHousing Action Plan Table, 2026.07 (City of Portsmouth Planning & Sustainability). The companion matrix to the published narrative, carrying four columns the web page omits: Key Implementation Steps, Lead, Metrics, and Milestone. The Metrics and Milestone columns are the basis for the measurability findings in the Progress Portsmouth affordability gap analysis below. 2026.07.HAP-Table.pdf
LocalHousing Committee Ranking List — working draft, May 2026 (City of Portsmouth Planning Department); synthesis of May 21 straw poll and later signals, with explicit rank assignments. 11 items scored. Basis for v2.19 committee_priority field replacing the May 21 record. Includes staff recommendations to retire Z-18 (room rental — already permitted) and Z-19 (seasonal worker housing — covered by co-living ordinance), and retitle Z-21 (audit → ordinance update).
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
Federal21st Century ROAD to Housing Act (2026) — enacted July 11, 2026 without presidential signature (Senate 85–5, House 358–32). Basis for the v2.23 federal_ref field on PL-1, I-14, P-14, and HTF-3. Plain-language Portsmouth mapping in the Progress Portsmouth module at road-to-housing-portsmouth.html. Grant programs referenced are authorized but not yet appropriated.
NH RSAHB 577 (2025) — ADU reform, amending RSA 674:71–73; eff. 7/1/25
NH RSAHB 631 (2025), Chapter 201 — Created the RSA 674 subdivision on multi-family residential development on commercially zoned land (RSA 674:79–80); eff. 7/1/26. Superseded in part by the two 2026 chapters below.
NH RSAChapter 319 (HB 1010, 2026) — Rewrote RSA 674:80. Municipalities shall allow multi-family dwelling units on commercially zoned land subject to an infrastructure adequacy test; planning board may require traffic, water, and sewer proof (I(a)–(c)) and may deny only on the grounds in II, which now include an abutting well owner demonstrating their well cannot meet existing demand; applicant may supply inadequate infrastructure; ground-floor retail authority preserved (IV); adaptive reuse dimensional exemption at V. Approved Jul 15, 2026; effective Jul 1, 2026 at 12:01 a.m. (retroactive). Defines multi-family dwelling units by cross-reference to RSA 674:43, I — structures containing more than 2 dwelling units.
NH RSAChapter 329 (HB 1588, 2026) — Amends RSA 674:16, VII (no garaged parking space may be required) and, via §6 under the §7 contingency, replaces RSA 674:80, V and adds VI–VII: multi-family allowed as a matter of right; municipalities shall not enforce additional requirements unless expressly authorized; frontage, setback, and height may not differ from what is allowed for commercial development; nonconforming structures may be converted where the envelope is not further violated; attorney’s fees recoverable on improper denial. The Ch. 319 adaptive reuse exemption is repealed by this section. Also creates the special assessment district chapter (renumbered RSA 162-X per §8, HB 1433 having become law) and directs DBEA to expand the housing infrastructure municipal grant program, appropriating $1. Approved Jul 15, 2026; zoning provisions effective Sep 13, 2026.
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)