Prince William Home Improvement Prince William Home Improvement was established by Scott Holtzhauer, in 1986, to serve the remodeling needs of the Northern Virginia area. Originally specializing in vinyl siding and vinyl replacement windows, Prince William Home Improvement has grown into a full-service outdoor living company that specializes in building decks, patios and screen rooms. Since 2000, Prince William Home Improvement has been ranked as one ot the top 500 contractors in the United States by Qualified Remodeler Magazine. In 2009 Prince William Home Improvement was ranked number 83 nationally, out of over 800,000 home improvement companies.