"Thank you so much for all your help and advice regarding improving my house to increase its value both to me and my family, while we are still living here, and eventually to a buyer.  It was a pleasure to work with you.  You understood my needs regarding time and budget and are so knowledgeable about home improvements and the real estate market.  I was overwhelmed, but you really helped me to understand how to prioritize the multitude of projects I wanted to complete..

My house looks great and the work cost less than I had anticipated. Thank you so much and I look forward to working with you in the future."