Sharon, MA Home Insurance: Lake Massapoag, Septic Systems and High-Value Homes

By Jon Merwin, Founder and CEO

Lake Massapoag · Septic, Not Sewer · Moose Hill and Borderland Woods · Sharon Center Historic District · Sharon, MA

Sharon sits about 22 miles southwest of Boston, roughly halfway to Providence, with I-95 and Route 1 as its main commuter roads and MBTA commuter rail trains stopping at Sharon station in the town center. Its 2025 hazard mitigation plan describes a 24-square-mile town where more than 5,000 acres are protected open space, and the Census Bureau estimated 18,798 residents on July 1, 2025. It is overwhelmingly a single-family town: the assessor counted more than nine in ten homes as single-family houses in the housing production plan, and about two in five dated from before 1960 at the 2000 Census. The open space plan notes that many newer homes, built since the 1980s, went up on higher ground, closer to sensitive natural areas.

Portsmouth Atlantic Insurance was founded in 2005 as a family-owned independent agency, and today we are licensed in 10 states, Massachusetts among them. We are New Hampshire’s highest-rated agency on Google, with 1,000+ Google reviews and over 2,000 testimonials. A Sharon homeowner works with one agent by phone or email, sees quotes from 40+ carriers and pays no fees. For statewide rules, see our Massachusetts homeowners insurance guide.

What should Lake Massapoag homeowners insure differently?

Lake Massapoag has shaped Sharon since the 1800s, when Boston businessmen built summer cottages along its shore and resort hotels filled with city visitors, as the open space plan recounts. Today the lake is used for swimming, boating and fishing, and the town manages its level under a written lake level policy dating to 1992. The outlet is a small gate and spillway structure on Massapoag Brook; the hazard plan classifies it as a significant-hazard dam, and the 2023 emergency action plan modeled a partial failure that would stay mostly in wetlands and the brook channel without reaching any homes.

The rules on the water matter for coverage. Under the town’s boating bylaw, owners and tenants of beach frontage and their guests may launch from their own beach, while everyone else uses the public ramp. Motors are limited to 60 horsepower, speed is capped at 15 miles per hour and drops to six within 150 feet of the shore or any pier or float, and the town’s beach and boating rules bar jet skis and other water-jet craft. Points to review:

• Docks and floats. A private dock, float or boathouse is usually covered as an other structure. Many homeowners forms exclude damage to docks and piers caused by ice, freezing or thawing, so read the wording before winter.
• Boats. A canoe or kayak may fit under a homeowners policy, but its watercraft coverage is narrow. A runabout or pontoon with an outboard is better placed on a dedicated boat policy, which we can write through Progressive, Foremost Specialty, American Modern and others.
• Beach liability. A private beach invites neighbors, guests and other people’s children. An umbrella policy stacks extra liability on top of your home, auto and boat coverage.
• Septic near the shore. The open space plan notes that some lakeside leaching fields sit within the 125-foot setback and some cesspools remain. Bringing an old system up to code is an owner cost, not an insurance claim.

How does living on septic affect a Sharon homeowners policy?

More than most towns west of Boston. The 2019 master plan says that, apart from the treatment plant serving the high school and middle school, Sharon has no municipal sewer for homes or businesses; the town relies on on-site septic systems, leaching fields and package plants, under Board of Health rules stricter than the state’s Title 5. On the water side, the town system serves nearly all homes, and a small share of properties still use private wells.

• Failure versus sudden damage. A septic system that wears out, clogs or fails a Title 5 inspection is maintenance. Homeowners insurance is built for sudden, accidental damage, and many policies exclude the system itself. Ask whether your water backup endorsement responds to a backup from a septic system as well as from drains.
• Renovations and rebuilds. MassDEP requires an inspection when a project needs a building permit to add a bedroom or changes a building’s footprint, and a failed system must generally be upgraded within two years. If a fire leads to a larger rebuild, the septic work is part of the budget. Whether ordinance or law coverage reaches it depends on the policy; ask before you need it.
• Wells. For the homes still on a private well, a pump that quits from age is not a claim. Equipment breakdown and service line endorsements can help with sudden mechanical failure and buried lines, and a generator keeps the well and sump running in an outage.

What do Moose Hill, Borderland and the power-line corridor mean for fire and tree risk?

Woods are a dominant feature of Sharon. Moose Hill Wildlife Sanctuary covers 1,967 acres and is Mass Audubon’s oldest and largest sanctuary, founded in 1916, and the hazard plan puts about three-fifths of Borderland State Park inside Sharon. The plan counts fewer than 20 brush fires a year, very few causing real damage, and lists the likeliest spots: wooded land along the railroad, the grassy edges of I-95, the Moose Hill and Snake Hill edges of Borderland, and the high-tension line crossing north-central Sharon, where a gas transmission line runs underneath.

Trees are the other half of the story. The plan calls Sharon’s tree-lined streets a trade-off residents accept. It records a late-1990s microburst that damaged trees and homes across a swath of town, a 2006 microburst that did heavy damage in eastern Sharon, and a September 1973 tornado that touched down in wetlands behind Heights Elementary School.

• Fire is a covered peril. Keep brush piles, mulch beds and stacked firewood clear of any house bordering conservation land, and make sure a fire truck can get up the driveway.
• Falling trees. A tree that lands on the house or garage is generally covered, with a modest allowance for removal; one that only lands on the lawn usually is not. Our snow and ice damage guide covers winter limbs and ice dams.
• Scheduled valuables. Jewelry, art and collections outgrow standard theft limits. The Division of Insurance notes scheduled items typically carry no deductible.

Can Sharon’s historic rules slow down rebuilding after a loss?

The master plan counts 523 Sharon properties in the state’s historic inventory. Three local historic districts review exterior changes: Town Center, Cobb’s Tavern, and the Wilber School, Pleasant Street School and Kate Morrell Park district. The Sharon Historic District in the town center is on the National Register, as are Borderland, Cobb’s Tavern, Stoneholm, the Stoughtonham Furnace Site and the Wilber School.

Outside the local districts, the demolition delay bylaw (Chapter 174) treats a building as significant if it is 100 or more years old or of unknown age, listed on the National Register, or included in the Historical Commission’s inventory. After a hearing, a building found preferably preserved cannot get a demolition permit for 12 months, unless the commission releases it sooner. The master plan also notes teardowns of modest Sharon houses to make way for larger ones. If you own an older house, carry enough additional living expense for a review period plus construction, and add ordinance or law coverage; our historic home insurance guide explains rebuilding in kind. If you are building new, the project needs builder’s risk coverage until it is finished.

Where does Sharon flood?

The hazard plan says flooding is not a significant threat to lives or property in Sharon, but water still collects in heavy rain and spring melt. It names the Canoe River, Massapoag Brook and the lake as the biggest flood sources, along with undersized culverts and drains. Morse Street on the south side of the lake floods every couple of years, and Saw Mill Pond Road floods annually because nearby catch basins do not drain properly. The plan lists no repetitive-loss properties in Sharon. It cites flood maps dated July 17, 2012 and a pending Neponset watershed map update, and recalls the March 2010 storms, when the Blue Hill Observatory measured 17.7 inches of rain in 19 days.

• Flood is a separate policy. Start with FEMA’s Flood Map Service Center for your address, then weigh flood coverage near the brooks, the lake or a low street even outside a mapped zone. When we place new NFIP coverage, it goes through Selective, and whenever we write a Chubb home policy we quote flood with it.
• Lower levels. FEMA limits what flood insurance pays below ground. See our flood insurance page.

Which carriers fit Sharon homes at different rebuild values?

A 1950s cape near the center and a large custom home on a Rural District lot of 60,000 or 80,000 square feet (zoning table) usually belong with different insurers. With a reconstruction estimate under about $2 million, most of our 40+ carriers can quote. From there, Openly, where we are appointed for Massachusetts, and National General can handle homes up to roughly $5 million. Cincinnati and Chubb both write homes at any dwelling limit, so we quote both. In Massachusetts, we place Chubb on high-value homes. Our reviews of Cincinnati and Chubb explain each company’s approach. If something goes wrong, we help you file the claim and keep after the carrier until it is resolved.

What other coverage makes sense in Sharon?

• Umbrella. Teen drivers on I-95, a pool, a lake beach and frequent guests add up quickly. An umbrella raises liability limits across all of those policies at once.
• Collector cars. Vintage and classic cars are usually better insured on a collector car policy than on a regular auto policy.

Nearby, see our Westwood, MA, Medfield, MA and Milton, MA pages. Call (603) 431-4020 to compare carriers for your Sharon home, or send the details through the form below.

Get a Sharon home insurance quote

Tell us about the property and we will compare carriers. Prefer to talk? Call (603) 431-4020.

Frequently asked questions

Is my dock on Lake Massapoag covered by homeowners insurance?

In most policies a dock counts as an other structure, so wind damage or a tree landing on it is covered up to that limit. Many policies exclude damage to docks and piers from ice, freezing or thawing, so check the wording and photograph the dock each fall.

Can I launch my boat from my own beach on Lake Massapoag?

The town bylaw lets owners and tenants of beach frontage, and their guests, launch from their own beach; others use the public ramp. Motors are limited to 60 horsepower. Anything with a motor is usually better on a boat policy than on homeowners coverage.

Does homeowners insurance cover a failed septic system in Sharon?

Generally not when the system wears out or fails inspection; that is maintenance. Some sudden damage may be covered, and a water backup endorsement may respond to a backup into the house, depending on wording. Ask us to check your policy.

Will a Title 5 inspection affect rebuilding after a fire?

It can. MassDEP requires an inspection when a project adds a bedroom under a building permit or changes the building footprint, and a failed system generally must be upgraded within two years. Plan for that in your rebuild budget.

How does Sharon’s demolition delay affect my homeowners insurance?

Only if the house qualifies: 100 or more years old, on the National Register or in the town inventory. If the commission then votes it preferably preserved, the town holds the demolition permit for a year, so plan your loss-of-use and ordinance or law limits around a longer rebuild.

Does living next to Moose Hill or Borderland affect my policy?

Not on its own. Fire and falling trees are covered perils; underwriters mainly look at roof age, nearby brush and how far the house is from a hydrant and the fire station. Clearing brush and cutting back overhanging limbs helps.

Who writes high-value home insurance in Sharon?

The answer moves with reconstruction cost. Below roughly $2 million almost all of our carriers are in play, and Openly and National General write up to roughly $5 million. Cincinnati and Chubb both write homes at any dwelling limit, so we quote both.

Do you have a Sharon location, and do you charge fees?

We do not have a Sharon location. Service is handled from our Portsmouth, NH office by phone or email, and there are no fees for quotes or service.

Sources

• Massachusetts Division of Insurance: Understanding Home Insurance
• Massachusetts Division of Insurance: Frequently Asked Questions about Homeowners Insurance
• Town of Sharon Hazard Mitigation Plan, 2025 Update (MAPC; FEMA approved June 13, 2025)
• Imagine Sharon: Town of Sharon Comprehensive Master Plan (July 2019)
• Town of Sharon Open Space and Recreation Plan (2009–2016)
• Town of Sharon Housing Production Plan Update (December 2010)
• Town of Sharon: Zoning Dimensional Requirements (quick reference)
• Town of Sharon General Bylaws, Chapter 120: Boats and Watercraft
• Town of Sharon Recreation: Beach and Boating Regulations
• Town of Sharon General Bylaws, Chapter 174: Historic Preservation (demolition delay)
• Mass Audubon: Moose Hill Wildlife Sanctuary
• Massachusetts DCR: Borderland State Park
• MassDEP: Buying or Selling Property with a Septic System
• U.S. Census Bureau: Vintage 2025 population estimates
• FEMA Flood Map Service Center
• FEMA: Flood insurance coverage for basements

This page is general information about homeowners insurance in Sharon, Massachusetts, and is not a coverage guarantee or legal advice. Coverage depends on each carrier’s policy wording, endorsements and underwriting. Local details on this page are general descriptions; confirm specifics for your property with the town. Flood is a separate policy from homeowners. Call (603) 431-4020 with questions about a specific home.