For me growing at organically has worked really well try attaching a Google review link to invoices or estimates things like that the more exposure you get for reviews good bad or ugly the more people click on your website just got to keep putting your name out there local Facebook pages Community pages it all helps or you can jump on board with a few companies that can help build your SEO they can be a little costly but if you do the marketing correctly and allocate the funds appropriately you can yield a pretty good Roi for me in my line of work I found door hangers to be the most effective and direct mailers