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Floating home, houseboat, or house on land?

Seattle calls them all 'houseboats,' but on paper they're three different purchases — different classification, different lenders, different inspections, different taxes. Here's the honest side-by-side, from the brokerage that lives on the water.

Is a houseboat real property?

Neither one is, and that surprises almost everybody. A floating home (no propulsion, permanently moored, utility-connected) is by statute not a vessel and is regulated as housing — but King County assesses it as personal property, there is no certificate of title, and it changes hands by bill of sale. A houseboat in the technical sense is a float on water residence, a different Seattle category again with detachable utilities. The distinction still matters enormously, because it drives the financing, the insurance, the sewer obligation, and whether the city's moorage protections cover you. In everyday Seattle conversation both get called 'houseboats,' so the first question on any on-water purchase is: which one is this, on paper?

Floating home, houseboat (FOWR), and land house compared across eight ownership dimensions
Dimension	Floating home	Houseboat (FOWR)	House on land
Legal classification glossary →	Regulated as housing and by statute not a vessel — but King County assesses it as personal property, and it transfers by bill of sale rather than by deed. There is no certificate of title.	Personal property: a registered or documented floating-on-water residence, even when lived on full-time (Seattle's FOWR category).	Real property — the default everything else is measured against.
What you actually own glossary →	The home plus a moorage arrangement — owned slip, co-op share, or lease. The moorage terms are half the purchase.	The floating-on-water residence itself, plus a slip arrangement with liveaboard permission — which is a marina relationship, not land ownership.	The home and the land under it, with whatever easements and HOA obligations the title carries.
Financing glossary →	Portfolio and specialty lenders — conventional mortgage desks rarely touch floats. Fewer lenders, more documentation, sort it before you shop.	Boat or floating property lending — a different product entirely, typically with different terms and down-payment expectations than a mortgage.	The full conventional and jumbo mortgage market — the widest, most competitive lending pool.
Insurance	Specialty floating-home policies from insurers who understand floats — not a standard homeowners form.	Floating-property / FOWR insurance, often requiring a current floating-property survey to bind coverage.	Standard homeowners insurance — the commodity product of this table.
Inspections glossary →	General home inspection plus the underwater half: a dive report on the float, stringers, and flotation.	A marine survey of hull and systems, usually with a dive or haul-out inspection — what lenders and insurers ask to see.	General inspection plus the usual specialists — sewer scope, roof, electrical — as findings warrant.
Taxes glossary →	Assessed by King County as personal property, so you get a personal property tax bill; owning the slip through a co-op or condominium can add a real property bill on top. Confirm the transfer-tax treatment with escrow rather than assuming the usual real estate rules.	Registered and taxed as a floating-on-water residence, so the excise treatment at sale can differ from the real-estate brackets — classification is the first thing to confirm.	Property tax while you own it; the seller pays graduated REET when it sells.
Monthly carrying costs glossary →	Moorage dues (owned, co-op, or leased), utilities including shore-side connections, and a reserve habit for float upkeep.	Slip rent with liveaboard fees, pump-out service, and FOWR maintenance — boats ask for attention on a schedule.	Property tax, insurance, utilities, and HOA dues where they apply.
Resale	Scarce inventory and a devoted buyer pool — moorage terms and float condition drive value more than square footage.	The buyer pool is bounded by liveaboard slips and marine financing, so pricing and patience matter.	The broadest market with the deepest comparable sales — the easiest of the three to price and to sell.

Legal classification glossary →

Floating home: Regulated as housing and by statute not a vessel — but King County assesses it as personal property, and it transfers by bill of sale rather than by deed. There is no certificate of title.
Houseboat (FOWR): Personal property: a registered or documented floating-on-water residence, even when lived on full-time (Seattle's FOWR category).
House on land: Real property — the default everything else is measured against.

What you actually own glossary →

Floating home: The home plus a moorage arrangement — owned slip, co-op share, or lease. The moorage terms are half the purchase.
Houseboat (FOWR): The floating-on-water residence itself, plus a slip arrangement with liveaboard permission — which is a marina relationship, not land ownership.
House on land: The home and the land under it, with whatever easements and HOA obligations the title carries.

Financing glossary →

Floating home: Portfolio and specialty lenders — conventional mortgage desks rarely touch floats. Fewer lenders, more documentation, sort it before you shop.
Houseboat (FOWR): Boat or floating property lending — a different product entirely, typically with different terms and down-payment expectations than a mortgage.
House on land: The full conventional and jumbo mortgage market — the widest, most competitive lending pool.

Insurance

Floating home: Specialty floating-home policies from insurers who understand floats — not a standard homeowners form.
Houseboat (FOWR): Floating-property / FOWR insurance, often requiring a current floating-property survey to bind coverage.
House on land: Standard homeowners insurance — the commodity product of this table.

Inspections glossary →

Floating home: General home inspection plus the underwater half: a dive report on the float, stringers, and flotation.
Houseboat (FOWR): A marine survey of hull and systems, usually with a dive or haul-out inspection — what lenders and insurers ask to see.
House on land: General inspection plus the usual specialists — sewer scope, roof, electrical — as findings warrant.

Taxes glossary →

Floating home: Assessed by King County as personal property, so you get a personal property tax bill; owning the slip through a co-op or condominium can add a real property bill on top. Confirm the transfer-tax treatment with escrow rather than assuming the usual real estate rules.
Houseboat (FOWR): Registered and taxed as a floating-on-water residence, so the excise treatment at sale can differ from the real-estate brackets — classification is the first thing to confirm.
House on land: Property tax while you own it; the seller pays graduated REET when it sells.

Monthly carrying costs glossary →

Floating home: Moorage dues (owned, co-op, or leased), utilities including shore-side connections, and a reserve habit for float upkeep.
Houseboat (FOWR): Slip rent with liveaboard fees, pump-out service, and FOWR maintenance — boats ask for attention on a schedule.
House on land: Property tax, insurance, utilities, and HOA dues where they apply.

Resale

Floating home: Scarce inventory and a devoted buyer pool — moorage terms and float condition drive value more than square footage.
Houseboat (FOWR): The buyer pool is bounded by liveaboard slips and marine financing, so pricing and patience matter.
House on land: The broadest market with the deepest comparable sales — the easiest of the three to price and to sell.

Which one can you finance with a normal mortgage?

The house on land, and mostly only the house on land. Floating homes are portfolio-loan territory — a smaller set of lenders who keep the loan on their own books and underwrite the float and moorage on judgment. FOWRs are boat loans. None of this makes on-water ownership impractical; it makes the lender conversation the first stage of the purchase instead of a formality.

What should each buyer budget for inspections?

All three start with a general inspection mindset — the difference is what's underneath. A land home adds specialists as findings warrant (sewer scope on older Seattle stock earns its keep). A floating home adds the dive report: a diver examining the float, stringers, and flotation, the closest thing the water has to a foundation inspection. A FOWR adds a floating-property survey, which lenders and insurers typically require before they'll touch the deal.

Where the floating life actually lives: the dock communities of Eastlake & Lake Union, Westlake, Portage Bay, and Wallingford & Northlake — each with its own dock culture and moorage mix.

Ready to go deeper? The houseboat & floating-home specialty page covers how these deals actually run; the inspection checklist’s floating-home section covers what to look at dockside; the floating-home glossary defines every term this page used; and the financing calculator sketches the monthly — moorage line included. Still not sure which of the three purchases you’re looking at? That’s exactly the question Linda M. Bagley answers first.

“Over the years I’ve noticed that there always seems to be one person who is at the center of the houseboat market, and right now Linda is that person. Knowledgeable, hardworking, and a good communicator.”

David F Google review · July 2023

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