Short answer: anywhere from $0 to $10,000+, like most trades. But HVAC has its own wrinkle: demand swings hard with the weather. A 95-degree afternoon or the first freeze sends people to their phones with a broken system, and they call the first company that looks real and picks up. What your website has to do in that moment matters more than what it cost.
The Three Real Options
DIY builders (Wix, Squarespace, GoDaddy): $15-40/month. Fine if you have the time to build it, write the pages, and keep it current. The cost is your evenings, and a template that looks like every other template.
Freelancers: $300-1,500 one-time. Quality varies a lot. Ask to see home service sites they've built, not restaurants or salons, and ask who handles changes after launch.
Agencies: $2,000-10,000+. You're paying for overhead as much as output. For a single-location or regional HVAC company, that premium rarely buys anything a smaller, focused build can't.
What an HVAC Site Actually Needs
- Separate paths for repair and replacement. Someone with no AC tonight and someone pricing a new system for next month are different customers. One page trying to serve both usually serves neither.
- Tap-to-call that's visible without scrolling. No-heat and no-AC calls come from a phone, often from a hot or cold house.
- Brand and certification info, shown plainly. If you install specific brands or hold manufacturer certifications, say so near the top. Replacement is a big purchase and people look for reasons to trust you.
- A maintenance plan page. If you offer tune-ups or service agreements, give them their own page. It's recurring work, and it's what people search for in the off-season.
- Financing information, if you offer it. A new system can be a major expense. Mentioning that options exist, in plain words, removes a reason to keep shopping.
- Your real service area, in writing. List the towns you actually cover. Vague "serving the region" language doesn't help a visitor decide whether to call.
The Hidden Costs Nobody Mentions
Hosting, a domain, and basic upkeep typically run $10-20/month no matter who builds the site. If you also want Google Ads sending traffic to it, that's a separate ongoing budget from the build. Be wary of anyone who bundles "guaranteed leads" into a one-time website fee; the math doesn't work unless something is being cut where you can't see it.
What I Charge, and Why
I build HVAC company websites for a flat $499. They're fast, mobile-first, and built around the calls you care about most. No monthly fee for the site itself. If you also want Google Ads running to it, that's a separate $750/month management fee, plus your own ad spend paid directly to Google, which I don't mark up. I build every site myself and run every campaign myself, and you can cancel anytime in the first 30 days.