A rare Marin County waterfront community: lagoon-front living with direct(ish) access to Novato Creek and San Pablo Bay—plus a very different risk-and-cost profile than most Novato neighborhoods.
Bel Marin Keys (“BMK”) is a 702-home lagoon community in eastern Novato built around two large man-made lagoons that connect to Novato Creek via locks, offering many homes true boating / kayak access to the Bay. It’s surrounded by open space and wetlands, which is part of the charm—and part of the due diligence.
Bel Marin Keys is the official, widely recognized name.
Locals often shorten it to “The Keys” or “BMK.”
You may also see it referenced through the local public district name: Bel Marin Keys Community Services District (BMKCSD).
Bel Marin Keys is in South/East Novato (94949) near the marshlands by the Bay. It’s closely associated with the Ignacio / Nave Drive corridor for Highway 101 access and sits near the Hamilton Wetlands/Bay Trail area.
This matters because buyers often assume “waterfront community = HOA.”
BMKCSD is a public entity and is not a homeowners association.
That said, BMK does have CC&Rs (rules) that apply to parcels.
There are also smaller sub-associations in certain enclaves (example: Keys Landing HOA, a small waterfront pocket within BMKCSD).
Practical takeaway: your “rules + fees” picture can vary by address. Don’t generalize from one listing.
Think of BMK less like one neighborhood and more like a set of micro-locations:
Lagoon-front homes (primary premium)
Direct water frontage on one of the lagoons.
Typically the strongest “Keys lifestyle” experience (views, docks, watercraft convenience).
More exposure to water-related maintenance and insurance nuance.
Near-water / interior homes
Often quieter/less exposed than some edge locations, but you may not get direct water frontage.
Still benefits from the “Keys feel” (walkability, water ambiance), typically at a different price point.
Creek-adjacent / edge locations
Closer to Novato Creek and the lagoon/lock connection.
Can be a plus for access; also can mean more “infrastructure awareness” (water control features, setbacks, and flood diligence).
Keys Landing (small enclave)
A distinct micro-pocket: 28 homes, its own HOA, private park and docks per their materials.
The headline: this is one of the few places in Marin where your backyard can function like a marina lifestyle—without leaving Novato.
On-water recreation: kayaking, paddleboarding, and (for many addresses) boating through the locks into Novato Creek and onward.
Nature-forward setting: wetlands/open space around the neighborhood.
Close-to-Bay Trail + Hamilton Wetlands: easy access nearby; there’s even a connecting trail to Bel Marin Keys called out in local resources.
Bel Marin Keys has an unusually “park-forward” feel for a waterfront neighborhood. The Bel Marin Keys Community Services District (BMKCSD) maintains eight neighborhood parks, plus open space areas and waterways throughout the community.
Montego Park
Caribe North Park
Hudson Park
Del Oro Park
Cavalla Park
Bahama Park
Sunset Park (BMKCSD notes outdoor fitness stations have been installed here, with additional stations planned around the community)
Softfall Park
Why this matters for lifestyle: these parks function like “micro-gathering points” for walking loops, kids play time, and casual neighbor interaction—one of the reasons BMK can feel more community-oriented than many non-waterfront Novato tracts.
BMK’s setting on the Baylands edge is a real lifestyle advantage: big-sky views, wetland wildlife, and flat, scenic trails within minutes.
The Hamilton Wetlands area offers excellent walking and biking on the Bay Trail, and local resources note a connecting trail that can take you over toward Bel Marin Keys.
Typical trail access / parking (Hamilton area): parking is commonly described as free and plentiful near the historic hangars area, with trail access nearby.
The Bay Trail is part of the larger regional effort to connect shoreline paths around San Francisco Bay, and BMK shows up within that broader shoreline/open-space context.
BMK ownership costs can look “normal” at first glance—until you account for the water and flood layer.
Base property taxes (standard CA framework)
BMKCSD / district charges and fees (varies; confirm current schedule and what’s included)
Flood-related insurance & compliance (often the swing factor)
Waterfront maintenance reality (dock/shoreline/metal corrosion, etc.)
FEMA flood zone + lender requirements (many areas are treated as high flood risk; don’t assume).
Current flood control context: Bel Marin Keys is included in Marin County Flood Control Zone 1 (Novato).
Whether an elevation certificate exists (can materially affect insurance pricing).
Dock rights / permits / encroachments (if applicable to the address).
Seawall/bulkhead condition where relevant (inspection quality matters more here than in most tracts).
Salt air + moisture impacts (hardware corrosion, HVAC lifespan, exterior paint cycles).
Disclosure set: Natural Hazard Disclosure, flood documentation, district docs, CC&Rs (and any sub-HOA docs if applicable).
Bel Marin Keys is a “high upside lifestyle” neighborhood that also demands a more sophisticated risk conversation than most Novato areas.
It is explicitly within Marin County Flood Control Zone 1 coverage for the Novato area.
The neighborhood’s identity is tied to lagoons, locks, levees, and creek infrastructure—so long-term resilience planning is part of the ownership story, not a footnote.
Forward-looking buyer mindset: don’t treat flood as a binary (“in/out”). Treat it as a pricing-and-lifestyle input: insurance cost, mitigation options, tolerance for uncertainty, and resale buyer pool.
Primary access is typically via the Ignacio Blvd / Bel Marin Keys exit and Nave Drive corridors for Highway 101.
South Novato positioning tends to be attractive for SF commuters compared to further north.
Hamilton Field: master-planned redevelopment vibe with parks/trails and newer housing variety; more “neighborhood grids + amenities,” less “private waterfront.” (Trail connectivity exists between Hamilton Wetlands and BMK.)
Pointe Marin / Marin Country Club / Loma Verde: more conventional suburban patterns; you’re choosing newer construction/golf neighborhood/views/commute considerations—not a boating lifestyle.
Bel Marin Keys is a strong fit if you value:
Waterfront ambiance and outdoor recreation at home
A quieter, nature-adjacent setting with open space boundaries
Willingness to do higher-level diligence (flood, insurance, waterfront infrastructure)
It’s usually a pass if:
You want “set-it-and-forget-it” ownership (waterfront is never that)
You’re extremely sensitive to insurance variability or flood-map complexity
If you’re selling in BMK, the winners typically:
Lead with lifestyle visuals: lagoon views, docks, sunsets, and “water access” story (when true for the property).
Pre-package the diligence: flood/insurance clarity, district docs, dock/seawall info—reduce buyer uncertainty early.
Price with the buyer pool in mind: you’re not competing with generic tracts; you’re competing with “other ways to buy a lifestyle.”
Bel Marin Keys is an unincorporated waterfront community in Novato (ZIP 94949) built around two large man-made lagoons with access to Novato Creek via navigational locks, creating a rare “lagoon living” lifestyle in Marin County.
Bel Marin Keys is commonly described by the District as a community of 702 single-family homes.
Bel Marin Keys is supported by the Bel Marin Keys Community Services District (BMKCSD)—a public district that maintains key shared infrastructure and amenities. It’s not a typical “subdivision HOA” setup, and essential services (water supply, sewage, garbage, police/fire, schools, etc.) come from other agencies.
BMKCSD states it maintains approximately 200 acres of waterways, eight parks, four boat ramps/docks, two navigational locks, open space, public lighting, and the levee.
No. Many homes are lagoon-front or creek-adjacent, but waterfront frontage and dock setups are address-specific. The neighborhood overall is organized around lagoons and Novato Creek, so micro-location matters more here than in most Novato tracts.
BMKCSD describes the lagoons opening to Novato Creek via locks and providing homeowners water access to San Pablo Bay. Important nuance: access, timing, and usability depend on tides, watercraft type, rules, conditions, and lock operations—so boaters should review the District’s current access procedures and regulations early.
Bel Marin Keys has two navigational locks that control water movement between the lagoons and Novato Creek. One historical reference describes periodic lock operations during high tide cycles to help flush silt and reduce dredging needs. For buyers, the practical point is: lock operations and waterway conditions are part of the lifestyle—ask for the most current District guidance during due diligence.
Yes—activities and watercraft operation within BMKCSD areas are regulated through Marin County code provisions tied to the District, including restrictions and enforcement mechanisms. If boating is a must-have, treat “rules + enforcement + access” as a pre-offer review item, not an after-closing surprise.
Marin County’s ordinance materials around BMKCSD restrictions include provisions that prohibit certain activities and specifically reference prohibiting entry of swimmers into District waterways from District open space/park/shoreline areas (i.e., “jumping in” from District-maintained areas). Because rules can be detailed and location-specific, buyers should confirm the current, enforceable policy for the exact activity/location they care about.
In the March 5, 2024 election, Measure G was described as authorizing (for 21 years) an annual $1,800 per taxable parcel special tax, escalating 2.5% annually, to fund infrastructure including locks, levees, and dredging waterways. This is a material part of the “cost stack” buyers should budget for and sellers should disclose clearly.
Bel Marin Keys is a low-lying waterfront community; flood requirements are property-specific and lender-specific. The clean way to verify is to use FEMA’s Flood Map Service Center and confirm lender underwriting requirements for the exact address. Bottom line: treat flood/insurance due diligence as a first-week priority in BMK.
For BMK, diligence items include: (1) flood zone + insurance reality, (2) District docs/assessments tied to locks/levees/waterways, and (3) waterfront edge/dock condition (if applicable). BMKCSD’s scope explicitly includes waterways/locks/levee infrastructure, so it’s not a “nice-to-have” review.
It’s an unincorporated community under Marin County jurisdiction (for permits, public services, etc.).
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