New tenant has three kids, and would like to put up a swing set. The yard is private and fenced, and the set was purchased by her. Would there be any liability concerns from allowing this? I was thinking about running it by my insurance agent, charging her if it makes a difference to the premium. Any one out there handle something like this before?

Single family with a fenced yard, I would allow it under the circumstances that all tenants sign a liability waiver for any injuries and carry a renters policy to cover their liability. Check with your insurance though as it may or may not affect your policy coverage or premium. 

That's being too strict. Tenants are legally allowed quiet enjoyment of the property. I could see making this an issue if they are bad tenants but if they pay on time and every time then allow the swing set. The fact that they even asked you makes me think they're good tenants..

Also as far as I know insurance providers could care less about a swing set. It's no roller coaster.

Absolutely I'd allow it. It would tell me that they planned on staying for years. When a tenant asks to do thing that indicate a long tenancy, I will usually have no problem. I had a tenant ask to install their own clothes washer because the husband was a mechanic and they wanted something heavy duty. I told them to be my guest! They stayed for 6 years

John, landlords insurance wouldn't cover the tenant anyway so I have no idea why you'd even mention tenants wanting to see a landlords insurance policy.

 I don't know about you but in this day and age, I cover my *** with signed docs to reduce/eliminate certain risk.

The way I see you post on the forum, it's the same thing over and over, makes me think you have never been a landlord and don't have any room to give advice on the subject. 

Renters insurance with liability and if she purchased the set you at least know it is newer.

Absolutely run it by your insurance agent first, pass along any additional costs and insist on the tenant having proof of renters insurance.

I insist all my tenants have renters insurance with a minimum 1M liability coverage.

honestly thinking back to when I was a tenant it would've never crossed my mind to even ask. I think them asking is a good sign in the first place

They have kids and want a swing set .  No , no no , those kids should be inside watching tv or playing video games .