Here's an update. Safeco will insure fiberglass over wood boats - as long as they aren't homebuilt from a kit.

Laszlo

My experience is about the same, no homebuilt boat will be insured on a boat policy.  I must have called at least 5 different insurance companies.  Most homeowners/umbrella policies cover liability for watercraft up to 19 ft. as long as there is not an engine of anytype (sail, oar, paddle ok)  This covers liability, but does not insure damage to your boat. 

Yeah, homeowners' works for boats at home, but this one's at a marina that wants to be a named insured party. I was able to finally get around it because the boat was built by CLC, not me. Otherwise I'd have been SOL.

Laszlo

   I also lost the ability to insure through Boat US/Geico a while back, as noted above. It took some research, but found this company (Markel) willing to provide coverage for my Rhode Runner.  They ask a lot of questions about your boating experience, your building experience, the vessel, and your claims history when setting up a policy, which is probably a good thing, as it gives you a chance to try to convince them your risk is low.  Their customer service has been good (no claims experience with them, so far, good thing...) and prices seem to be reasonable - though we could all always hope for cheaper insurance.

https://www.markel.com/us/personal-insurance/boat-and-yacht/boat 

FYI, my (uninsured) NE Dory took a major hit about two months ago - from a 10 inch diameter branch that landed on it when lightening "exploded" the top of a big 3' diameter gum tree in my back yard. Just about made me sick to my stomach. After taking pictures and asking for $2,500 for repairs for the boat, USAA homeowners insurance gave me $1,500. The boat was hit so hard that a giant "shark bite" was taken out of the starboard side side between the 3rd and stern seats. Split off about 3 ft of gunwale and destroyed the top two lapstrakes in an area about 2 ft wide, with cracks & etc. down into the 3rd lapstrake. The boat was actually amazingly tough to survive the blow it took. The blow was hard enough that it caused the bunker support bracket to slide down on the trailer frame on the starboard side, and hard enough that the opposite gunwale (port side, midships) got a small crack where the tie town strap held that side of the boat down. The overall damage might have actully been less had the boat not been strapped to the trailer, thus allowing a freer "bucking" motion when the branch landed. Anyway, I was able to splice in some home-made lapstrake sections I built using left-over okume - lesson learned: save all those scraps from your builds! I re-created the lapstrake edges with a router, used lap joints in front, and re-used the puzzle joints to the rear of the damaged area . I carefully cleaned up the puzzle joints with a dremel, then created my own mating puzzle ends on the home-made panels. Also some creative clamping and bracing to get curvature correct on installation. Instead of trying to pull a matching curve into the new gunwale (that would have been very difficult in this short section) I used a board and cut out a one-piece replacement section of non-stressed wood to match the original curvature.  I decided to glass over the whole repair area on the external side, maybe not necessary, but mde me feel better. After about two weeks work the repair is pretty much invisible from 10 ft., and would be even more invisible if I'd been better able to match the stain shade exactly on hull interior. That is so tricky to do. Luckily on Amazon I found a can of the discontinued Petit Interlux Brightsides Sapphire Blue to match the hull. If you've got anything painted in Brightsides and are thinking about recoating in the near future, consider buying now, as it is no longer produced. This major repair was an interesting exercise and I'm satisfied with results (boat will get the first re-splash today), but NOT one that I hope to repeat. 

BTW, USAA did cover my damaged sheds and, with some cajoling did cover the money we spent the day after the the incident to get the whole tree taken down, in advance of filing the claim. There were alll kinds of big pieces dangling up in the exploded top. I was able to convince them it was an imminent danger that would have caused much further damage to sheds (which was a true fact). - Bubblehead

   Adding another quick note, giving thanks for at least some luck. I was in Michigan with my 16 ft. travel trailer and 2 CLC kayaks when the lightening struck in July. My wife was home in GA to deal with the incident, thankfully, and thanks to neighbors, too, for their help. BUT - had the kayaks and camper been in their usual storage locations (I store my kayaks on some supports sitting atop the dory, all under a tarp) both of the kayaks would surely have been cut in half, and the camper likely totaled. Who knows, the destruction of the kayaks might have saved the dory from significant damage, but not an experiment I'd like to have seen in reality.  So, at least there is that - it could have been worse.