Quick Answer: For most backyard growers, a greenhouse is already covered — as an “other structure” under Coverage B of a standard homeowners policy, the same category as a shed or detached garage, typically up to around 10% of your dwelling coverage amount. What it doesn’t cover: anything growing or stored inside (that’s personal property coverage, a separate limit), and any greenhouse used to grow or sell produce commercially (that needs farm or business coverage instead). Check your declarations page for the actual Coverage B number before assuming a large kit is fully protected.
Most of what gets written about greenhouses is which one to buy or how to keep it warm. Almost nobody covers what happens if a windstorm takes the roof off one — because for most hobby growers, the honest answer is “your existing homeowners policy already handles it,” just not without limits worth knowing about first.
Greenhouse insurance by the numbers: a standard homeowners policy’s Other Structures coverage (Coverage B) is typically capped at about 10% of your dwelling (Coverage A) limit, according to insurance-industry guidance from Hippo — so a policy with $450,000 in dwelling coverage carries roughly $45,000 in combined other-structures protection, shared across every shed, fence, detached garage, and greenhouse on the property, not issued separately per structure. That same guidance confirms Coverage B is automatically bundled into most homeowners policies (you can’t opt out of it), but explicitly excludes structures used for business or short-term-rental purposes and doesn’t extend to the contents inside.
What’s actually covered, and what isn’t
| What you're protecting | Coverage type | Typical limit | Covered? |
|---|---|---|---|
| The greenhouse structure itself (frame, glazing, foundation) | Coverage B — Other Structures | ~10% of dwelling coverage, shared across all structures | Usually yes, for personal use |
| Tools, pots, grow lights, heaters stored inside | Personal property coverage | Separate limit, set by your policy | Usually yes, subject to that limit |
| The plants themselves | Personal property coverage (often a low sub-limit for plants) | Often capped low, e.g. per-plant or per-event limits | Sometimes — check your specific policy wording |
| Greenhouse used to grow/sell produce commercially | Farm or business property insurance | Separate policy entirely | No, homeowners policies generally exclude business use |
| Flood damage to any of the above | Separate flood insurance | Separate policy entirely | No, standard homeowners policies exclude flood |
Why “other structures” is the category that matters
Insurers don’t have a line item for “greenhouse.” When one shows up in an underwriting file, it gets classified the same way a shed, detached garage, gazebo, or guest house does: an “other structure” on the same property as the insured dwelling. That’s genuinely good news for anyone with a small walk-in kit or mini greenhouse — no separate policy to shop for, no extra premium in most cases, since Coverage B typically comes bundled into a standard policy at no additional cost for its default limit.
The friction shows up at the higher end. A serious large greenhouse kit or a glass structure like our best Exaco greenhouse picks can run well into four figures — sometimes low five figures once a real foundation and utilities are added, as our how much does a greenhouse cost guide breaks down. If that single structure, plus an existing detached garage and shed, adds up to more than the shared Coverage B limit, a total loss won’t be fully reimbursed even though the greenhouse itself is technically “covered.”
Confirm your Coverage B limit before you order a large kit
- If a large kit alone would exceed your current limit, ask your agent about raising it — usually a small premium increase rather than a new policy.
- Anchoring matters here too: a kit that isn't properly secured is more likely to become a partial, argument-prone claim after a storm. Our best greenhouse anchor kit picks cover wind-rated anchoring.
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The line between “personal use” and “business use”
The other place homeowners coverage quietly stops is commercial activity. If a greenhouse is purely for your own tomatoes and seedlings, it stays squarely inside Coverage B. The moment it’s regularly producing plants, cut flowers, or starts that get sold — at a farmers market, roadside stand, or online — most homeowners policies treat that as business use, which Coverage B specifically excludes. At that point the structure needs farm insurance or small-business property coverage instead, a genuinely different product with its own underwriting, not just an add-on to the existing homeowners policy.
This distinction matters even for casual sellers. You don’t need a large commercial range to trip it — a backyard nursery selling starts a few weekends a year can already be outside personal-use coverage, and liability is part of the exposure too: if a customer is hurt on the property or alleges a plant-related issue, personal liability coverage on a homeowners policy generally isn’t built to handle that either. Anyone selling regularly, even part-time, is worth a conversation with an agent about a business rider rather than assuming the homeowners policy stretches to cover it.
What to actually do before (or after) you buy
- Pull your declarations page and find the Coverage B number. It’s usually listed as a flat dollar amount, not a percentage — that’s the real ceiling across every non-dwelling structure on your property.
- Add up what’s already using that limit. A detached garage, shed, fence, and gazebo can already be drawing on the same shared pool a new greenhouse would join.
- Call before ordering anything large. A large greenhouse kit or a heavy glass structure is worth a five-minute call to confirm it fits, especially once a foundation and wiring for a heater are factored into the replacement cost.
- Separately check your personal property limit if the plants and equipment inside represent real value — a mature citrus or bonsai collection, for instance, can be worth more than the structure housing it.
- Flag business use honestly. If there’s any regular selling involved, ask specifically whether it needs to move to a farm or business policy rather than assuming the homeowners policy already stretches to cover it.
The bottom line
For the large majority of backyard growers, a greenhouse is already insured the moment it goes up — bundled in as an “other structure” alongside the shed and the fence, no extra shopping required. The two things worth actually checking are the dollar limit on that shared Coverage B pool (not just whether coverage exists) and whether any selling activity has quietly pushed the structure into business-use territory that a personal policy doesn’t reach. Both take one phone call to confirm, and both are far cheaper to sort out before a claim than during one.