Hopefully the business was built to sell. The first thing you want to do, is find a solid legal team that has M&A experience. From there you'll want o plan with you CPA for AFTER the sale. Next, it's time to get ALL of your books ready along with taxes, client lists, etc.
Once you have all of that in order, you'll want to find a broker that specializes in Home Service businesses. They will be able to help valuate the business and then list it.
The real work starts once the business is listed and you start talking to potential buyers. From there you'll have a much better perspective on how long and how much money this will take. Once you accept an offer, it can take anywhere from 3-6 months to close that deal.
From my experience, it's a very emotional and lengthy process that you can't truly understand until you walk though the ENTIRE process.
Best wishes with the sale!!!!!!!