Hello property investors, I received a phone call from my property manager a few days ago regarding a request from the tenant living my rental property. The property manager told me that the kids of the tenant had become sick over the last few months and long story short, had found out that it was the carpet in the property causing their young children to experience allergies. This tenant has been living in the property for the past 3 years and this is their first time complaining of such allergies. There are tiles throughout the residence and only carpet in the bedrooms. So the property manager is now telling me that because of such health issues, the tenant has requested that I change the carpet to something non allergenic, otherwise they are saying that they will move out. In general these tenants have been quite good, they generally look after the place, pay their rent on time and only issue about 1 maintenance request per year. I have been trying to weigh up the pros and cons of each option and have decided that from a property value viewpoint the best way forward may be to actually agree to their request and to simply change to a different surface either hypoallergenic carpet or even use some kind of floorboard as 1) the existing carpet is about 12 years old now and 2) possibly may increase the value of the property as a rental for future tenants. The other thing I was considering was that not many tenants would be agreeable to have renovation being done whilst they were living in a property and doing it like this would allow the rent to still be coming in whilst the property is being improved. On the other hand, I am pretty certain the tenants would object to any rent increase (fixed lease ends in September 2015) as they have indicated in the past that they are at their financial limit in terms of the rent they are paying. The problem is that the market has moved since their last lease signing and the market rent is at least 10-20 dollars per week higher than their current rent, at the same time however, it will be spring time and the vacancy rate is at 2% so I'm wondering if it is worth the gamble of replacing the carpet and increasing the rent. I'm wondering, what do you guys think would be the best course of action in this situation?