Most states require that a builder of a new home deliver at the very least a minimum 1-year warranty to their buyers (check your local state requirements). Also, it is a great idea to build your brand backing the work that you do when building a new home. Customer service is a key ingredient to any business, especially new home construction.
We have spent years building a warranty that is reasonable for both sides, and allows buyers to feel good about you as the renovator/rehabber, and for you as the renovator/rehabber to feel good about your product, while at the same time not giving the impression that you are a landlord to your buyers as well. Check your state laws to confirm the timing of when you are required to deliver at least a sample copy of builders warranty to buyers. In many states, it is before mutual acceptance of any purchase/sale, so you include a sample copy at the minimum in your sales paperwork. You can then hand deliver a copy of that same warranty to the buyer at closing, or during your walk through or new buyer orientation. This warranty can be delivered to a buyer upon mutual acceptance of a purchase and sale contract, or, can be used to market the property, and attached to the purchase and sale contract.