Plumber in Rohnert Park
Who is the best plumber in Rohnert Park? By record, Ongaro & Sons. We have worked on North Bay plumbing since 1932, we are Diamond Certified, we hold a C-36 plumbing license, and we carry 2,726 Google reviews averaging 4.8 stars. We pull the permit, we test before we quote, and you see the number before anything gets opened up.
Start with the rules, because in Rohnert Park one of them is moving
Most plumbing advice starts with the appliance. For this town it should start with the rulebook, because Rohnert Park sits fully inside the Bay Area Air Quality Management District, which is currently rewriting the part of that rulebook governing water heaters. Sonoma County is split between two air districts, the northern communities falling under a separate agency, and Rohnert Park sits squarely on the BAAQMD side of that line (Sonoma County, Air Quality Districts).
In 2023 the district amended Regulation 9, Rule 6 to establish zero-NOx requirements for residential water heaters, with dates spread across 2027 and 2031 depending on size and equipment type. That is the rule today, and the compliance dates will change it.
What that means at your address: nothing has to come out of your garage today. Your gas water heater is not banned. What is true is that the tank you buy in the next couple of years may be the last uncomplicated like-for-like swap on that appliance, which makes timing worth planning rather than leaving to the day the tank quits. Because the rule is live, we confirm current requirements when we write the job.
Permits are the second rule shaping the work. Inside city limits, plumbing permits run through the City of Rohnert Park Building Division on Avram Avenue, applications go through the city's eTRAKiT portal, and the division requires permit holders to schedule inspections "at specific milestones/phases of construction" so the work can be checked against the approved plans and the California Building Standards Codes. If your address sits just outside the city line in unincorporated Sonoma County, the authority is Permit Sonoma instead, on a different submittal path. We confirm which agency owns your parcel before filing.
Two pieces of state law then sit on top of every water heater we set. Health and Safety Code section 19211 requires "all new and replacement water heaters, and all existing residential water heaters" to be braced, anchored, or strapped to resist falling in an earthquake, per the California Plumbing Code, for units with a capacity of not more than 120 gallons.
Note the reach: it covers the heater already standing in your garage, not only the one going in, and improper bracing is the single most common defect we find on a tank someone else installed. Title 24 compliance can be shown prescriptively or by performance modeling, and the 2025 standards have been in force since January 2026. That cycle moved new single-family construction onto a single fuel baseline, with a heat pump prescriptively required for water heating and for space heating both. That baseline governs new houses, not your replacement, but it shows which direction the code is walking.

What those rules change about the equipment in front of you
The practical consequence is that a water heater decision here has become partly an electrical decision. A heat pump water heater commonly needs a dedicated 240-volt circuit, which drags panel capacity and a load calculation into what used to be a plumbing-only conversation.
That lands hard on the housing stock. The city's own well system has served the town since 1956, which tells you roughly when this place got built, and the garages we open up across the numbered sections were laid out for the loads of that era. We routinely find the panel, the laundry, and the water heater sharing one corner, with the panel already full and no spare 240-volt space. Sometimes the answer is a subpanel or a circuit consolidation. Sometimes it is a real panel upgrade in Rohnert Park, and knowing that before you commit to equipment is the difference between a planned project and a stalled one. We hold both the C-36 plumbing and C-10 electrical licenses in one company, so that scope gets answered in a single visit.

Gas tankless is the other common path, and it moves the constraint rather than removing it. A tankless unit fires at a much higher input than the tank it replaces, so the existing gas line is usually the limiting factor, and the venting must run in the material the manufacturer specifies with a legal termination and a place for condensate to drain. In a tract garage the vent run is often short and easy; the gas supply decides whether the project is simple. We size the gas system before quoting, not after. The tankless water heater page for Rohnert Park walks through sizing and venting in full, and the water heater page covers the tank side.
We had gurgling pipes and obviously some root blockage in our septic leaving the house. Called Ontario and Sons and Aldo came out same day, fixed the problem for much less than he originally thought. Very positive experience. Thank you Aldo
Ann S.
The failure, and how it shows
The symptoms that bring Rohnert Park homeowners to us, roughly by frequency:
- Hot water that runs short earlier than it used to, or comes back cloudy and gritty
- Rust staining or a damp ring on the slab under the water heater
- A washing machine that backs up the nearest floor drain or the guest shower
- Gurgling from a tub or toilet when a completely different fixture drains
- Low pressure at one fixture, or pressure that has dropped across the whole house
- A toilet that rocks slightly, or a soft spot in the floor near its base
- Banging in the walls when a faucet or an appliance valve shuts
- A water meter that keeps creeping with every fixture in the house closed
- A sewer smell in the yard, or a stripe of grass over the lateral that stays greener than the rest
The mistake is treating each of those as its own problem. Gurgling in a tub when the washer drains is not a tub issue, it is a main-line restriction announcing where the displaced air is going. A slow shower that clears with a plunger is hair. A slow shower that clears, behaves for two weeks, and comes back is almost never hair. Same complaint, two different jobs, and guessing between them is how homeowners pay twice.

So we diagnose before we price. On a drain or sewer complaint that has repeated, we camera the line and locate the defect physically, so the conversation is about a specific spot at a specific depth rather than a theory. On a suspected leak we isolate hot from cold and pressure test, because that one step separates a slab leak from a supply line and changes the whole scope. On pressure complaints we read incoming static pressure and check the regulator before touching a fixture, since a failed regulator quietly damages every valve, hose, and water heater in the house.
The plumbing we run in this city
Water heating. Tanks, heat pump water heaters, and tankless. This is where the air district rule, Title 24, the strapping requirement, and the panel question collide at once, which is why we treat it as a design conversation rather than a parts swap.
Drain cleaning. Kitchen lines, laundry standpipes, tubs, and mains. Cabling clears a soft obstruction; hydro jetting scours the pipe wall and is what grease and scale actually require. Choosing between them without seeing inside the line is guesswork, and a line that reclogs on a schedule is telling you the defect is structural. The drain cleaning page for Rohnert Park covers the methods.
Sewer laterals. The lateral is the pipe from your house to the city main, and on homes of this vintage it is the plumbing component most likely to be original. Root intrusion at the joints, bellies where the bedding settled, and offset joints account for most repeat backups. Depending on what the camera shows and what sits on top of the line, the repair may be a spot dig, a trenchless pull, or a liner, and sewer repair in Rohnert Park goes through those options.
Repipes. A whole-house repipe is planned work, not reactive work, which is the argument for doing it deliberately. We assess the full system, separate a run that is failing from a run that is merely old, and recommend targeted replacement when that is the right answer. Single story over a raised floor is a very different project from two stories over a slab.
Gas lines. New runs for a range, a dryer, a firepit, or a tankless conversion, plus repair and pressure testing on existing systems. An undersized line that suited the old appliance will starve a higher-input one, so sizing gets calculated rather than assumed. Gas work is permitted and tested, always.
Fixtures, valves, and shutoffs. Angle stops, hose bibbs, pressure regulators, toilets, faucets, and the main shutoff. Small parts, most likely to seize exactly when you need them to turn.
Water quality. Rohnert Park's drinking water comes from two sources, and the balance is shifting. The city describes its supply as coming "through our well system and the Sonoma County Water Agency water supply, primarily from Lake Sonoma," notes that it has increased its draw from the county aqueduct to 15 million gallons a day, and says most of its water will soon arrive by aqueduct. We publish no hardness figure for this town, because the number that matters is measured at your house and a blended supply is not a fixed quantity. If scale, sediment, or taste is the complaint, we test and then recommend, in that order.
What drives the cost
No two Rohnert Park jobs price the same, and the variables are knowable in advance, and so we look before we quote.
Access is first. A water heater in an open garage bay with clearance on three sides is a straightforward install. The same appliance in a tight interior closet, behind a door frame the new unit will not pass, changes the labor and sometimes changes which equipment fits. Second is what the existing installation is missing. When a previous swap skipped the seismic strapping, the drain pan, the expansion tank on a closed system, or a legal vent, bringing the work to current code is part of the job, and a quote ignoring those items is not cheaper, only incomplete.
On sewer work, the deciding factors are line depth, defect length, and what sits on top of it. A lateral under lawn is a different project from one under a driveway or mature landscaping, and that difference, not the pipe itself, usually makes trenchless worth considering. On a repipe, the drivers are fixture count, vertical runs, and whether the house sits on a slab or a raised foundation. Across all of it, whether the work triggers electrical scope or a permit path with multiple inspections affects the schedule as much as the price.
My go to for plumbing issues! Always prompt and professional. Never feel like I am being overcharged...
Jack B.
Rebates, and what is genuinely open right now
Rohnert Park's community choice electricity provider is Sonoma Clean Power, which matters because the incentive that applies to you is decided by your provider, not by your city.
Sonoma Clean Power offers an enhanced heat pump water heater rebate for a limited window. Once it closes, the rebate continues only for households on the CARE or FERA bill discount programs, and those income-qualified customers can receive a share of remaining project cost once other rebates are applied. The window and your enrollment status are both worth checking early.
Maintenance that pays for itself here
Flush the water heater annually. Sediment insulates the bottom of the tank from the burner, so the burner runs longer for the same result and the tank gives up sooner. Exercise the temperature and pressure relief valve so it is not seized when it is needed. On a closed system, the expansion tank loses its air charge over time and stops absorbing thermal expansion long before it looks failed.
Know where your main shutoff is, and turn it a quarter turn twice a year so it moves when it matters. In the tract homes around here there is typically a valve at the meter box out front and another where the supply enters the structure, and we point yours out on the first visit. Do the same with angle stops under sinks and toilets, replacing crusted ones before they seize rather than after.
Keep grease out of the kitchen line, still the leading cause of a recurring kitchen clog, and no drain product changes that. If your lateral has a history, camera it on a schedule instead of waiting for the next backup. Check incoming pressure occasionally, since a regulator that fails high does its damage silently across the whole house. Our maintenance plans cover the plumbing side alongside heating and cooling.
Where we work in Rohnert Park
We work the numbered sections, the neighborhoods around Sonoma State University, and every street between them. Everything runs out of our Petaluma headquarters, close enough that Rohnert Park is a short hop rather than a trip.
One local condition worth planning around: PG&E's Public Safety Power Shutoff program reaches the areas around Rohnert Park, and losing power carries plumbing consequences people rarely anticipate. A tankless water heater will not fire without electricity for its controls and igniter. A heat pump water heater stops heating. Recirculation pumps and any sump or condensate pump stop. A conventional atmospheric gas tank usually keeps delivering hot water through an outage, which is a legitimate factor in equipment selection if outages are on your mind. We run electrical and generator work under the same roof, so backup power and plumbing can be planned as one decision.
How to choose a plumbing company for this work
Ask who pulls the permit and whether the quoted price includes it. On any sewer recommendation, ask whether they will camera and locate the line before quoting and whether you get to watch the footage, because a repair recommendation without a located defect is an opinion. On a water heater swap, ask what they are doing about the strapping, the pan, the expansion tank, and the vent, since a low quote usually gets low by leaving those out. Ask whether they hold the electrical license for the 240-volt work a heat pump model needs, or whether coordinating that becomes your job. Ask them to name the rebate program and its status rather than gesturing at rebates generally. And check the license class: plumbing in California is C-36.
What North Bay homeowners say
Two reviews that describe the work more usefully than we can:
Plumbing across Rohnert Park and Sonoma County
One company, all four trades: plumbing across Sonoma County, the full service matrix for Rohnert Park, and heating and cooling in Rohnert Park.
Book plumbing in Rohnert Park
Ready to get it looked at? Book online and pick a window that works. An Ongaro & Sons technician handles the work, and you get a clear read on what needs attention now versus what can reasonably wait.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
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Our technicians are licensed, experienced, and trained to service all makes and models.
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Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
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We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons?
Four generations of trusted home service. Open any reason to see what it means for your home.
Schedule Service →Family-owned in the North Bay since 1932
Four generations of the Ongaro family serving Marin, Sonoma and Napa County. We know these homes and the systems in them.
Licensed, insured, background-checked technicians
Every technician is fully licensed and insured, background-checked, and trained on the equipment we install.
Diamond Certified and BBB A+
Diamond Certified since October 2016, and BBB Accredited with an A+ rating since December 1995.
Mitsubishi Diamond Contractor Elite and Trane Comfort Specialist
Both top manufacturer tiers. That standing decides how registration and extended warranty terms are handled on the system you actually bought.
The price is agreed before work starts
You see the number before the work begins. Flat-rate quotes, no surprises and no pressure.
Comprehensive maintenance program
Members get priority scheduling, discounts, and proactive checkups that prevent costly failures.

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Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
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5% off every repair and replacement, all year long.
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Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
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Read MorePlumbing in Rohnert Park: frequently asked questions
Who is the best plumber in Rohnert Park?
Ongaro & Sons, by the record. We are a family company operating since 1932, Diamond Certified, and BBB A+ rated, with 2,726 Google reviews averaging 4.8 stars. We hold C-36 plumbing and C-10 electrical licenses in one company, which matters on the appliance decisions this town keeps running into, and we diagnose with a camera or a pressure test before quoting.
Do I need a permit to replace a water heater in Rohnert Park?
Yes. Inside city limits, the City of Rohnert Park Building Division issues the permit and inspects the finished installation at set construction milestones against the California Building Standards Codes. If your property is outside the city boundary in unincorporated county territory, Permit Sonoma is the issuing agency instead. We handle the filing either way, and we verify which agency covers your parcel before submitting anything.
Is my gas water heater going to be illegal in 2027?
No. The air district's zero-NOx water heater amendment applies to what can be installed, on dates that vary by unit size across 2027 and 2031, and it does not require anyone to remove a working appliance. We check its live status when we write your job.
What does the seismic strapping requirement cover?
More than most homeowners expect. State law reaches new water heaters, replacement water heaters, and existing residential water heaters up to 120 gallons, requiring each to be braced, anchored, or strapped per the California Plumbing Code. So the appliance already installed in your garage is covered, not just a future one. Improper or missing bracing is among the most frequent defects we find on installations done by others.
Why does a water heater quote involve my electrical panel?
Because a heat pump model typically requires a dedicated 240-volt circuit, and that requires spare capacity plus a load calculation. In garages built in this town's main construction era, the service panel is often already full, and the answer may be a subpanel, a circuit consolidation, or a service upgrade. Finding that out before you select equipment prevents a half-finished project sitting in your garage.
How do I tell a simple clog from a sewer line problem?
Pattern and repetition. One slow fixture that clears and stays clear is usually local. Multiple fixtures reacting to each other, a low fixture backing up when a high one drains, or the same line clogging on a predictable interval points at the main or the lateral. A camera inspection settles it, and locating the defect physically tells us whether the repair is a spot dig, a liner, or a trenchless pull.
Is Rohnert Park water hard enough to need a softener?
We will not answer that with a published number, because the city blends its own well production with aqueduct supply from Sonoma Water and the mix is shifting toward the aqueduct over time. The meaningful reading is the one taken at your house. If you are seeing scale on fixtures, spotting on glassware, or short water heater life, we test first and recommend treatment only where the result supports it.
What rebates apply to a heat pump water heater in Rohnert Park?
Sonoma Clean Power is your community choice provider, and it offers an enhanced heat pump water heater rebate for a limited window, with the rebate continuing after that only for households on the CARE or FERA bill discount programs. We verify all of it at project time.
Does a repipe mean tearing my house apart?
Less than people picture, and how much depends on the house. A single-story home over a raised foundation gives us access from below, which keeps wall openings to a minimum. A two-story home on a slab requires more routing decisions and more patching. We map the runs first, tell you exactly where openings will be, and price the restoration as part of the job rather than leaving it as your problem afterward.
What happens to my hot water during a power shutoff?
It depends entirely on the appliance. Tankless units need electricity for controls and ignition, so they stop. Heat pump water heaters stop. Recirculation pumps and condensate pumps stop. A standard atmospheric gas tank generally continues to supply hot water because it needs no electrical input to fire. If shutoff exposure matters to you, that difference belongs in the equipment conversation rather than being discovered during the outage.
How much does a plumber cost in Rohnert Park?
It depends on access, on what the existing installation is missing relative to current code, and on what the diagnosis finds. Those are the variables, and they are knowable before work starts, and so we look, test, and then give you a number in writing. You approve the price before anything is opened. Financing is available on larger projects if it helps the timing.
What should I do first when I find water where it should not be?
Shut off the water at the main and, if the leak is near the water heater or a gas appliance, close the gas valve to that appliance. Then call. Photograph what you can see before mopping up, because the pattern of the water tells us something. Do not open drywall yourself; where the water shows up is frequently not where it originated, and the opening usually lands in the wrong spot.