As many posters have noted - homeowners' insurance is usually based on replacement cost when it comes to the house. Can be replacement or actual cash value when it comes to contents (although some states may mandate one or the other). Replacement cost for the house is certainly dependent to a large extent on its square footage. But it can also depend on how the house is built (high end/low end/in the middle).
Also - insurance doesn't cost the same statewide - especially in a large diverse state like Florida. We live on a barrier island - but it's in northeast Florida - not south Florida. Our structure (2800 sq under A/C with a 3 car garage and some covered porches) is insured for $620k (replacement cost). We have $465k in contents coverage (replacement cost). The latter is probably a bit on the high side (the coverage has been indexed for inflation). But it's not ridiculously high. We have a lot of optional endorsements - although they're more for things like bursting pipes and earthquakes (this area has had earthquakes) than jewelry or fur coats (when people are quoting their seemingly high rates - they may be forgetting that they're paying a fair amount for $10k in extra jewelry coverage). We have a 2% windstorm deductible - about $12k. It's the deductible that makes the most sense for us.
Our premium - paid last month - with State Farm Florida - was $2169. Which I think is pretty reasonable. We also pay $579/year for maximum federal flood insurance ($250k structure/$100k contents). Also reasonable IMO.
Note that our policy shows premium reductions totaling $1856. Almost as much as the total cost of the policy! There are discounts for building in accordance with the 1995 building code - our claims record - and almost $1000 as a wind mitigation discount. Because of the way we built our house (no gables - hip roof - impact windows - impact garage doors - etc.). There is also a $300 discount because we have our auto policy with State Farm (doesn't make sense to save $150 here shopping around for your auto policy because you'll just pay more for your homeowners' policy).
One of the biggest issues in Florida in recent years when it comes to the cost of homeowners' insurance hasn't been windstorms. It's fraudulent sinkhole claims:
New Florida law takes aim at sinkhole fraud
I'm not an expert in the area - but it seems like a lot of homeowners whose houses weren't built properly/on sturdy foundations developed structural defects - like cracks - that homeowners then claimed were the result of sinkholes. This type of fraud increased a lot after the building bust in 2008 (no surprise there). When we renewed our policy a few years ago - we had to have a "crack inspection". To make sure our house didn't have cracks that we might later claim were the result of sinkhole damage.
Our rates have been pretty stable over the last decade or so. And I sure don't shop the policy around every year. Doesn't make sense for us. Although it might make sense for people elsewhere.* Because there are so few companies here in Florida that have more than 2 nickels to rub together. Also because we have a large umbrella policy - which few companies here offer. Also because State Farm has been good to us over the decades. Keeping rates relatively stable and staying in the market. At least for us. Note that State Farm Florida did eliminate a lot of its homeowners' policies a while back. First to go were the people in the highest risk areas. But second to go were the folks who kept the security blanket of their State Farm homeowners' policies while shopping their auto policies around every year.
We've only had 1 claim with State Farm. Parking lot fender bender where we were deemed at fault. State Farm handled the property damage claim the other guy had in a reasonable manner (our damage was less than our deductible). Chubb was our carrier when we lived in Miami - but it dropped us when we moved here. Chubb is writing in this area now - but I think minimum annual household premiums it wants these days are policies that cost a total of at least $25k. Not in our league. Overall - I am sure State Farm Florida will do something to pi** me off one day. But - so far - so good. Robyn
*There are lots of factors that enter into the cost of insurance. I think it's perhaps possible in some places to get the best deals if you shop your policies "a la carte" - but I suspect packages with multiple policy discounts will work better for a lot of people. One consideration for us seniors is a company like State Farm doesn't seem to drop your auto (or other) insurance policies when you reach some arbitrary age. It still insures my father (auto/renter's/umbrella policies).