Daly City HVAC Permits

Where to File Your Daly City HVAC Permit

HVAC permits in Daly City go through the Building Division, which operates out of City Hall at 333 90th Street. If you've been pulling permits in San Francisco, you need to reset your expectations here because this is a completely different jurisdiction with its own codes, fee schedule, and inspection staff. Contractors who work both sides of the city line sometimes forget this and show up with SF paperwork, which gets them absolutely nowhere. Daly City is in San Mateo County, not San Francisco County, and the permitting process reflects that.

The good news is that the Building Division here is significantly more approachable than what you're used to in SF. The office is smaller, the staff knows the regulars, and you can often get questions answered with a quick phone call rather than navigating layers of bureaucracy. For straightforward residential HVAC work, you can submit your application at the counter and sometimes walk out with an approved permit the same day if your paperwork is clean.

What Permits You Actually Need

A standard HVAC replacement in Daly City requires a mechanical permit. If you're running new gas lines or modifying existing ones, you'll also need a plumbing permit. Electrical work beyond the existing circuit means pulling an electrical permit as well. Daly City keeps this pretty simple for residential projects. You can file your related trade permits together, and the plan check process handles them as a package rather than making you go through separate review cycles for each discipline.

One thing worth knowing is that Daly City follows San Mateo County's amendments to the California Building Code, not San Francisco's. If you've been working exclusively in SF, review the county-level amendments before you submit. The differences are mostly minor, but they exist, and a plan reviewer who catches a discrepancy will send your application back for corrections.

Fees and What to Budget

Daly City's permit fees are genuinely reasonable, especially if you're comparing them to San Francisco. For residential HVAC work, you're typically looking at $100 to $300. A simple like-for-like furnace swap will run you toward the lower end, around $100 to $150. A full system replacement with ductwork modifications and multiple trade permits will push closer to $250 to $300. These are real numbers that won't significantly impact your project budget, which is a relief for homeowners who've gotten quotes in SF and seen the permit line item alone eat into their contingency.

The fee schedule is straightforward and published on the city's website. There are no surprise surcharges or technology fees that meaningfully change the total. What you calculate from the fee schedule is essentially what you'll pay at the counter.

Realistic Timelines

This is one of the biggest reasons contractors enjoy working in Daly City. Permit turnaround for standard residential HVAC work is typically 5 to 10 business days, and simpler projects can get over-the-counter approval if you come in with everything ready. Compare that to San Francisco, where you might wait three to six weeks for a mechanical permit, and you can see why Daly City is a breath of fresh air. The plan review team is small but efficient, and they don't have the crushing backlog that larger jurisdictions deal with.

Inspections are similarly quick to schedule. Daly City covers a relatively compact area, so inspectors can move through their daily schedule efficiently. Next-business-day inspections are the norm for residential work, and the inspectors are consistent in what they look for. You won't get wildly different interpretations from one inspector to the next, which is something you can't always say about larger cities.

Working in Daly City's Row Houses

If you've driven through the Westlake district, you know exactly what Daly City looks like. Block after block of pastel row houses built in the 1950s and 1960s by Henry Doelger, packed tightly together on narrow lots. These homes are the backbone of the HVAC replacement market here, and they come with their own set of quirks. The original heating systems in these houses were wall furnaces or gravity floor furnaces, and many have been retrofitted over the decades with forced-air systems that were shoehorned into spaces never designed for ductwork.

When you're bidding HVAC work in Westlake or the surrounding neighborhoods, pay close attention to the existing duct routing. Closet-mounted furnaces are common, and attic access can be tight in these low-pitched rooflines. Equipment selection matters here because you're often constrained by the physical space available. The permit application should reflect the actual installation conditions, and plan reviewers in Daly City are familiar with these homes, so don't try to submit a generic plan that ignores the spatial realities.

The Fog Factor

Daly City shares San Francisco's famously foggy, cool climate. Summer highs rarely crack the mid-60s, and the marine layer keeps things damp for much of the year. This means the HVAC market here is overwhelmingly heating-focused. Air conditioning is rare in residential settings because there are only a handful of days each year where you'd actually want it. The vast majority of your work will be furnace replacements, and heat pump conversions are gaining traction thanks to California's electrification push. The mild climate actually makes Daly City an excellent candidate for heat pumps, since the units never have to work against extreme cold.

Title 24 and HERS Testing Requirements

California's Title 24 energy compliance requirements apply in full in Daly City. You'll need to submit your CF-1R compliance documents as part of your permit application. The compliance calculations should reflect Daly City's climate zone, which is California Climate Zone 3, the same as San Francisco. This means the same performance thresholds and prescriptive requirements apply. If you're already set up to do compliance work in SF, your workflow translates directly.

After installation, you'll need a HERS (Home Energy Rating System) verification before Daly City will sign off on the final inspection. The HERS rater will test duct leakage, verify refrigerant charge, check system airflow, and confirm that the installed equipment matches what was permitted. Given the age of the housing stock in Daly City, duct leakage testing can be tricky. Those 1950s row houses often have ductwork that's been patched and extended over the years, and getting the leakage numbers into compliance sometimes requires more sealing work than you originally scoped. Factor that into your bids.

Have your HERS certificate in hand before you call for the final city inspection. Daly City's inspectors will ask for it, and showing up without it means a failed inspection and rescheduling.

Learn More

For a broader overview of HVAC permitting across California, check out our complete HVAC permit guide. If you also work across the county line, our San Francisco permit guide covers the differences you'll encounter there. And for other San Mateo County jurisdictions, see our Redwood City permit guide.