By Jon Merwin, Founder and CEO
Greenwich has some of the most significant residential property in Connecticut, and insuring it calls for more than a standard homeowners policy. The town’s homes range from historic shoreline cottages that have been expanded several times to large estates on acreage in the backcountry, and each comes with its own coverage questions. As an independent, family-owned agency working with 40+ carriers, Portsmouth Atlantic Insurance helps Greenwich homeowners compare high-value options and understand exactly what their policies do and do not cover.
Two Very Different Greenwich Risk Profiles
When underwriters look at a Greenwich home, one of the first things they consider is where it sits. North and south of the Merritt Parkway, the risks can look almost like two different towns.
Backcountry Estates
Backcountry Greenwich is defined by large lots, long private drives, stone walls, mature trees, and substantial custom homes, many with guest houses, pool houses, stables, or other outbuildings. Here the questions tend to center on fire protection, water damage, and tree loss rather than storm surge. Some properties sit farther from hydrants or fire stations, which can affect how carriers view the risk. Large homes with extensive plumbing are vulnerable to frozen or burst pipes, especially when owners travel during the winter. Wind and ice storms can bring down mature trees onto roofs and outbuildings.
Underwriters in this market often value protective features such as central station fire and burglar alarms, water leak detection with automatic shutoff, low-temperature monitoring, and backup generators. We help backcountry clients understand which of these features matter to the carriers they are considering and how they may influence coverage terms.
Outbuildings deserve particular attention. A barn, guest cottage, or pool house can represent significant value on its own, and the default coverage for other structures on a policy may not be adequate. We review each structure so the limits reflect what it would actually take to rebuild.
Old Greenwich, Riverside, and the Shoreline
Along Long Island Sound, neighborhoods such as Old Greenwich, Riverside, Belle Haven, and parts of Cos Cob and Byram face a different set of exposures. Nor’easters, tropical storms, and coastal wind can drive water and debris toward the shore, and low-lying streets can flood during strong surge events. Waterfront and near-water homes may sit in designated flood zones, and many carriers look closely at elevation, construction, and mitigation when deciding whether and how to write them. Our Greenwich and Westport shoreline flood page covers flood options in more depth.
Shoreline homes in Greenwich are also highly varied. Some are newly built to current elevation standards. Others are older homes that have been renovated and expanded over decades. Each type raises different questions about construction, rebuild cost, and the cost of meeting current building and flood codes after a loss.
Hurricane deductibles and Nor’easters
Many Greenwich policies carry a separate hurricane deductible. Connecticut Insurance Department guidelines say that within 2,600 feet of the coast a hurricane deductible may not exceed 5%, and farther inland it may not exceed 2% (renewals farther inland also depend on whether the home has storm shutters) (CID Filing Review Guidelines, Coastal Homeowner Policies).
A percentage deductible is a percentage of your dwelling limit, so on a large home it can be a significant number. It applies only when the event meets the hurricane definition in your policy, so Nor’easters and ordinary windstorms usually fall under your regular deductible. Find the trigger wording and the percentage on your declarations page, and see our guide to hurricane deductibles in Connecticut.
Private flood and NFIP
Homeowners policies exclude flood, including storm surge from Long Island Sound. For Greenwich homes we compare two routes:
- NFIP: we write new NFIP business through Selective. NFIP building coverage tops out at $250,000 and contents at $100,000 (FloodSmart.gov), which is well below the rebuild cost of many homes here.
- Private and excess flood: we compare Flow Flood, Neptune Flood, Beyond Floods, The Flood Insurance Agency, CatCoverage and Aon Edge. Depending on the home, private flood can replace the NFIP policy or sit above it as excess.
Look up your zone in the FEMA Flood Map Service Center and bring an elevation certificate if you have one. Read more on our flood insurance page.
Getting the Rebuild Number Right
The most important number on a high-value policy is the dwelling limit, and it should reflect the cost to rebuild your home, not its market value. In Greenwich, land value can account for a large share of a home’s price, especially near the water. At the same time, the cost to rebuild a custom home with stone, slate, plaster, custom millwork, and integrated systems can be considerably higher than many owners expect.
High-value carriers frequently conduct an on-site appraisal to establish replacement cost. We encourage Greenwich clients to take advantage of that process and to revisit their limits after renovations, additions, or major interior upgrades. Coverage for upgrading to current building codes is also worth reviewing, particularly for older shoreline homes that may need to be elevated or rebuilt to stricter standards.
Valuables, Staff, and Liability
Many Greenwich households own jewelry, watches, fine art, wine, and collections that exceed the limits of a standard policy. Scheduling these items on a high-value policy or a separate valuables policy can provide agreed-value coverage and broader protection. We help clients organize appraisals and keep schedules current as collections change.
Liability is another area where high-value households benefit from careful planning. Pools, frequent entertaining, household employees, and multiple drivers all increase exposure. An umbrella policy adds a layer of liability protection above your home and auto coverage, and coordinating the underlying policies helps avoid gaps. See our umbrella insurance page. For clients who place their home with Cincinnati or Chubb, placing auto with the same carrier as part of a broader package can keep the program coordinated.
Greenwich Neighborhoods: What Changes for Insurance
Greenwich is one town, but a Backcountry estate and a house a few blocks from the harbor in Old Greenwich raise different insurance questions. Here is how we approach each part of town.
Backcountry
Backcountry homes tend to be larger, on more land, and farther from the water. Wind and storm surge matter less here. What matters more is how quickly a fire can be put out. Insurers ask how far the home is from the nearest fire hydrant and fire station, whether it relies on a private well, and whether it has a monitored fire alarm, sprinklers or a backup generator. Long driveways, multiple outbuildings, pools, barns and guest houses all need to be listed and valued, because each one affects the rebuild number and the liability exposure.
Old Greenwich
Old Greenwich sits along Long Island Sound, so flood zone, elevation and wind exposure come first. FEMA’s flood maps are the only documents that legally determine whether a property is in a designated flood zone, and the Town points owners to FEMA for that answer (Town of Greenwich, “What flood zone is my property in?”). If your home is in a Special Flood Hazard Area, an elevation certificate records the lowest-floor elevation that NFIP uses to rate the policy, and it can support a request to amend the map (Town of Greenwich Planning & Zoning, FEMA Elevation Certificate).
Riverside
Riverside combines waterfront and near-water homes with inland streets a short distance away. Two homes on the same street can have very different flood answers, so we check each address against the current map rather than assuming. For waterfront homes, we compare NFIP coverage with private or excess flood options, and we review the hurricane deductible on the homeowners policy.
Cos Cob
Cos Cob mixes older homes near the harbor and the Mianus River with newer construction farther inland. Older homes raise rebuild questions: replacing plaster, millwork and original details to the same quality costs more than a standard estimate assumes. Homes near the water carry the same flood and deductible questions as Old Greenwich and Riverside.
Local risks, with sources
- Flood zones: Zones beginning with “A” or “V” are Special Flood Hazard Areas. Your zone and base flood elevation appear on FEMA’s Flood Insurance Rate Map for your address (FEMA Flood Map Service Center; Town of Greenwich Planning & Zoning, FEMA Elevation Certificate).
- Town flood rules: Greenwich regulates construction in its Flood Hazard Overlay Zone under Section 6-139.1 of the Building Zone Regulations. That can affect how a damaged home must be rebuilt (Town of Greenwich, “What flood zone is my property in?”).
- Hurricane deductibles: The Connecticut Insurance Department’s coastal underwriting guidelines govern how hurricane deductibles are applied to shoreline homes (Connecticut Insurance Department, coastal homeowners underwriting notice). See our guide to Connecticut hurricane deductibles.
- Flood limits: NFIP building coverage is capped at $250,000 and contents at $100,000. Many Greenwich shoreline homes need excess or private flood coverage on top of that (FloodSmart.gov (NFIP)).
Rebuilding to current code can cost more than putting back what was there. Ask whether your policy includes ordinance or law coverage, and at what limit.
More from the town’s hazard mitigation plan:
- Greenwich has 117 repetitive loss properties, 109 residential, most along Long Island Sound (WestCOG Hazard Mitigation Plan, Greenwich Annex).
- The southern half of town is on public water; northern parcels are likely on private wells (Greenwich Annex).
- The March 2, 2018 Nor’easter saturated soil and brought down several hundred trees, and power was out for more than 6,600 customers, according to a news report cited in the plan (Greenwich Annex).
High-value carriers for Greenwich homes
Which companies can write your home in Greenwich depends mostly on what it would cost to rebuild (Coverage A), not on what it would sell for.
- Rebuild cost under about $2 million: almost all of our 40+ carriers are fair game, so we can compare a wide field on coverage, deductibles and service.
- About $2 million to $5 million: the field narrows. Openly and National General write homes up to about $5 million.
- Over about $3 million: this is where we typically start with Cincinnati, on its own or side by side with Chubb. See our Cincinnati Insurance review.
- Chubb: we use Chubb for high-value homes only. See our Chubb review.
Many Greenwich estates fall above $3 million in rebuild cost, where carriers inspect and often require leak detection and central-station alarms.
About Portsmouth Atlantic Insurance
Portsmouth Atlantic Insurance was founded in 2005 and is licensed in 10 states. We compare 40+ carriers and charge no fees on any line we write. We serve Connecticut by phone, email and online, with a Fairfield County office coming soon.
Back home we are the most-reviewed independent insurance agency in New Hampshire, with 1,000+ Google reviews and over 2,000 testimonials. You can read them on our client feedback page.
Nearby: Darien, New Canaan. Reading: luxury home insurance in Greenwich, Darien and Westport. General Greenwich page: Greenwich insurance agency. Homeowners guide: homeowners insurance in Greenwich, CT. Statewide: Connecticut high-value home insurance.
Get a high-value home quote for your Greenwich home
Tell us about the house and how you use it, and we’ll compare carriers that fit its rebuild cost and location. No fees, no obligation. Prefer to talk? Call (603) 431-4020.
Frequently asked questions
Do I need flood insurance for a Greenwich home on the water?
Homeowners policies exclude flood, including storm surge. Most shoreline homes need NFIP or private flood, and many need excess above the $250,000 NFIP building limit.
How is a backcountry Greenwich estate underwritten differently?
Carriers look at distance from a hydrant and fire station, water supply, driveway access, alarms and generators, plus outbuildings and staff.
What is the hurricane deductible near the Greenwich shoreline?
Under CID guidelines, up to 5% within 2,600 feet of the coast and up to 2% farther inland. Your policy shows the actual figure.
Which carriers write Greenwich homes over $3 million?
We typically start with Cincinnati over about $3 million, alone or alongside Chubb. Openly and National General write up to about $5 million.
Do backcountry Greenwich homes need different coverage than shoreline homes?
Often, yes. Backcountry estates tend to raise questions about fire protection, water damage, tree loss, and outbuildings, while shoreline homes in Old Greenwich and Riverside focus more on flood, wind, and named-storm deductibles.
Does my Greenwich high-value homeowners policy cover flood?
Typically not. Flood and storm surge are usually excluded, so waterfront and low-lying homes need a separate NFIP or private flood policy.
How is the dwelling limit set for a Greenwich estate?
It should be based on the cost to rebuild the home, not market value. High-value carriers often perform an on-site appraisal to estimate replacement cost.
Do you charge fees?
No. We charge no fees on any line we write.
Do you have a Connecticut office?
We serve Connecticut by phone, email and online, with a Fairfield County office coming soon. Call (603) 431-4020.