The Decisions That Can’t Be Undone
Thirty years of choices that permanently reshaped Nantucket
Nantucket voters and town boards make hundreds of decisions every year. Most are routine. But a small number permanently reshape the island. Zoning changes. Land policy. Infrastructure investments. Housing rules.
Once implemented, these decisions cannot realistically be reversed.
Below Deck reviewed several major choices from roughly the past three decades to identify decisions that permanently altered Nantucket — choices where the island cannot simply go back.
Part 3
The Housing Decisions
Housing Nantucket
Housing policy decisions can take years to show their full consequences.
On Nantucket, those consequences are now impossible to ignore.
1. The Rise of Short-Term Rentals
What was promised
Flexible housing use and additional income opportunities for homeowners.
What happened
Short-term rentals expanded dramatically over the past two decades and became deeply embedded in the island’s tourism economy. Thousands of homes now function partly or primarily as seasonal rentals.
What can’t be reversed
The island’s housing market and tourism economy are now structurally tied to short-term rental income.
What was gained
• expanded tourism capacity without building large hotels
• substantial income for property owners
• significant local tax revenue
• economic activity tied to seasonal visitors
What was lost
• year-round housing availability for workers
• stable neighborhood populations in some areas
• housing affordability for local families
• long-term rental supply for island residents
2. Chapter 40B Developments
What was promised
Affordable housing production for communities struggling to meet state housing thresholds.
What happened
Several developments on Nantucket were built under Massachusetts Chapter 40B, which allows certain projects to bypass aspects of local zoning.
What can’t be reversed
Once built, these developments permanently alter neighborhood density and infrastructure demand.
What was gained
• new housing units added to the island’s supply
• increased affordable housing inventory
• progress toward state housing requirements
What was lost
• local control over some development approvals
• neighborhood-scale decision-making in certain cases
• predictability in development patterns
3. Workforce Housing Initiatives
What was promised
Housing solutions for Nantucket’s year-round workforce.
What happened
Various town-supported and nonprofit housing initiatives created new workforce housing developments across the island.
What can’t be reversed
Land dedicated to workforce housing is effectively committed to that use long-term.
What was gained
• housing opportunities for local workers
• support for year-round businesses and services
• stabilization of some segments of the year-round population
What was lost
• alternative uses for scarce developable land
• flexibility in how those parcels might have been used in the future
4. The Seasonal Housing Economy
What was promised
A thriving seasonal economy built around tourism and second homes.
What happened
A large portion of Nantucket’s housing stock is now used seasonally or as short-term rentals.
The island’s economy is structured around this seasonal housing market.
What can’t be reversed
Property values, tourism, and municipal revenue are now deeply tied to seasonal occupancy patterns.
What was gained
• a strong tourism-driven economy
• some of the highest property values in the country
• significant seasonal economic activity
What was lost
• a larger year-round residential population
• housing affordability for many working residents
• the balance between seasonal and year-round community life
- Marcello Bruni
Content Lead
3/11/26
Part 2
The Inrastructue Decisions
Boston GlobeB
Some decisions do not look dramatic at the time. But infrastructure largely determines what an island can support.
1. Sewer Expansion
What was promised
Protection of groundwater and harbor water quality.
What happened
Over the past two decades Nantucket expanded sewer infrastructure into neighborhoods historically served by septic systems. Sewer systems allow higher development density than septic systems.
What can’t be reversed
Once sewer infrastructure is installed, it becomes permanent and shapes future development patterns.
What was gained
• improved wastewater treatment systems
• reduction of nitrogen pollution entering coastal waters
• protection of Nantucket Harbor and nearby estuaries
• the ability to support denser development in some areas
What was lost
• the natural density limits that septic systems once imposed
• lower development pressure in previously low-density areas
• the slower pace of growth that septic-based development once enforced
2. Airport Expansion
What was promised
Improved access to the island and stronger economic connectivity.
What happened
Nantucket Memorial Airport expanded facilities, increased seasonal flights, and accommodated larger aircraft. Passenger traffic has grown significantly over the past several decades.
What can’t be reversed
Transportation infrastructure creates permanent access patterns and visitor capacity.
What was gained
• faster and easier travel between Nantucket and major cities
• stronger tourism economy and visitor accessibility
• improved reliability for year-round residents traveling off island
• expanded seasonal economic activity
What was lost
• quieter airspace over parts of the island
• the lower volume of visitor traffic seen in earlier decades
• a greater sense of geographic isolation that once defined island life
3. Steamship Authority Capacity
What was promised
Reliable transportation for residents, visitors, and the island economy.
What happened
Vehicle ferry capacity expanded significantly, allowing more cars, construction equipment, and freight to reach the island.
What can’t be reversed
Once ferry capacity expands, the island’s economic system adapts to it.
What was gained
• more reliable freight and supply deliveries
• greater construction capacity for building projects
• improved transportation access for visitors and residents
• stronger logistical support for the island economy
What was lost
• lower traffic levels on island roads
• a slower pace of transportation movement across the island
• the quieter road conditions of earlier decades
4. Harbor Mooring Expansion
What was promised
Expanded boating access and support for Nantucket’s marine economy.
What happened
Nantucket Harbor now supports thousands of moorings and slips, making it one of the most active recreational harbors in New England.
What can’t be reversed
Once harbor infrastructure and mooring systems expand to that scale, reducing them becomes extremely difficult.
What was gained
• expanded boating access for residents and visitors
• strong marine tourism activity
• increased economic activity tied to boating and harbor services
• a thriving seasonal boating culture
What was lost
• the quieter harbor conditions that once defined Nantucket waters
• less crowded anchorages and harbor views
• a slower maritime rhythm that existed before large-scale boating traffic
Next: The Housing Decisions
- Marcello Bruni
Content Lead
3/8/26
Part 1
The Land Decisions
Courtesy: Nantucket Land Bank
1. The Land Bank Transfer Tax (1983 → present)
What was promised
Permanent protection of Nantucket’s open space.
What happened
A 2% real estate transfer fee now funds one of the most aggressive land acquisition programs in the country. The Land Bank controls more than 3,000 acres across the island.
What can’t be reversed
Land purchased by the Land Bank is permanently removed from private development.
What was gained
• thousands of acres of preserved moors, beaches, and coastal landscapes
• a network of public walking trails and conservation areas
• long-term protection of wildlife habitat and ecological systems
• protection of scenic views and the island’s open character
• public access to land that might otherwise have become private estates
What was lost
• potential land for housing development
• future flexibility in how those parcels might have been used
• opportunities for additional residential neighborhoods
• developable land on an island where the supply is already finite
2. The Expansion of Conservation Land
What was promised
Long-term protection of Nantucket’s natural landscape.
What happened
Through acquisitions by the Nantucket Land Bank, Nantucket Conservation Foundation, the Trustees of Reservations, and other organizations, roughly half of Nantucket is now protected land.
This preserved landscape has become one of the defining features of the island.
What can’t be reversed
Conservation restrictions are designed to be permanent and are rarely removed.
What was gained
• protection of large uninterrupted landscapes across the island
• long-term preservation of moors, wetlands, and coastal ecosystems
• public access to conservation trails and open space
• protection of the island’s rural and natural character
What was lost
• additional land available for housing development
• flexibility to respond to future housing needs
• the possibility of distributing growth more broadly across the island
• development pressure shifted onto the smaller amount of remaining private land
3. Large-Lot Zoning Expansion (1990s–2000s)
What was promised
Protection of rural character and prevention of overdevelopment.
What happened
Large sections of Nantucket were rezoned to two-acre and three-acre minimum lot sizes, dramatically lowering potential housing density.
What can’t be reversed
Once restrictive zoning becomes established, reversing it is politically and practically very difficult.
What was gained
• lower-density residential neighborhoods
• preservation of open space within private parcels
• protection of rural character in many parts of the island
• reduced strain on roads and infrastructure from higher density development
What was lost
• thousands of potential housing units over time
• opportunities for modest neighborhood growth
• the ability to add smaller homes or workforce housing in many areas
• flexibility in how land could evolve as housing demand increased
4. The Historic District Commission
What was promised
Protection of Nantucket’s historic architectural character.
What happened
The Historic District Commission evolved into one of the most influential architectural review systems in the country. Exterior changes across much of the island require HDC approval.
What can’t be reversed
The historic district framework is now deeply embedded in Nantucket’s planning and regulatory structure.
What was gained
• preservation of the island’s distinctive architectural identity
• protection of historic streetscapes and building styles
• visual continuity that reinforces Nantucket’s historic brand
• strong protection of the island’s historic tourism appeal
What was lost
• faster construction timelines
• simpler building approvals for homeowners
• lower construction costs for renovations and new buildings
• flexibility in architectural design and modernization
Closing
Once land policy is written into deeds, zoning maps, and conservation restrictions, the island’s physical landscape changes permanently. But land policy is only part of the story.
Next: The infrastructure decisions that reshaped Nantucket.
- Marcello Bruni
Content Lead
3/6/26