Southwood Plumbing & Heating
Company Overview
Expert in:
- Plumbing services
Based in San Francisco, Denis O'Halloran leads the company as owner/operator. He follows in the footsteps of his father, Frank O'Halloran. In 1964, the company was established as Hayes Valley Hardware, Heating and Plumbing in San Francisco. In 1966, the company relocated from Filmore to the Southwood Shopping Center at Orange and El Camino in South San Francisco.
While attending Arch Bishop Riordan High School, Denis started working after school and on weekends at Southwood Hardware, Plumbing and Heating, assisting his father and his partner, Bill Sylvia. After completing his education at Riordan High School in 1981, Denis purchased a partnership from Bill Sylvia. At that point, he committed to working full-time in the business. Denis holds the title of Certified Plumbing Inspector and has taught apprenticeship courses at San Mateo Adult School in collaboration with the Plumbing, Heating, and Cooling Contractors Association. Denis is also a certified backflow tester with the American Water Works Association. Denis possesses a C-36 Plumbing License from the State of California and a C-20 Heating/HVAC License. He enjoys fishing in his spare time and has celebrated 20 years of marriage.
Business Services
- Drain repair
- Gas line installation
- Gas line repair
- Hot water recirculation pump installation
- Hot water recirculation pump repair
- Hydro-jetting
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Water heater installation
- Water heater repair
Business Location & Hours
Mon: | 9:00 AM - 5:00 PM |
Tue: | 9:00 AM - 5:00 PM |
Wed: | 9:00 AM - 5:00 PM |
Thu: | 9:00 AM - 5:00 PM |
Fri: | 9:00 AM - 5:00 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

On time. Serviced all faucets for leaks and installed a new garage faucet. Roto'd upstairs tub, too. Scott was a pleasure.

Edit 11/4/2020: Yeah, downgraded to one star. Toilet re-install seems fine but I was also charged for having the flapper replaced. It's been a little over a month, and I have to jiggle the toilet handle so the tank refills and doesn't just run nonstop. Just don't go with these guys at this point. Still haven't heard back from them either regarding initial email and phone calls.
TL;DR: If (that's a big if) you can get them to respond to your multiple emails and phone calls, they provide good service.
Long version: Southwood came highly recommended by the company that redid my floors, and it also turned out they're on my HOA's list of recommended vendors. Another plus, the owner Denis is a fellow SF native! Great! So I called them a couple of times to get on the schedule to have my toilet re-installed after putting new flooring in. Scott was great--he got the work done quickly and efficiently, even went to get additional parts needed to make sure the toilet was working well.
Then, I found out that my bathtub faucet didn't work. Scott had taken a look while he was here to re-install my toilet and said that he'll have to show his boss the pictures and explain the situation to provide me with an estimate.
I heard nothing. I followed up by sending Southwood an email requesting an update. No answer.
I sent another email a few days later. No answer.
I followed my email up with a phone call. The woman who picked up the phone said the owner wasn't in the office, but she'll make sure to pass along the message that I was following up on my email. Nothing.
I followed up yet again with another phone call. A woman picked up again (not sure if it was the same woman) and said the boss wasn't in the office and said again that she'll make sure to pass along the message that I was following up on my email.
Now, 1.5 months after my initial email regarding the non-functioning bathtub, I'm left with no place to shower or bathe. I've scheduled another plumber to come in, but I will NEVER contact Southwood again due to the lack of communication and follow-up.

Just had my water heater replaced today by Carlos. Right on time, friendly & answered all my questions. Never complained about the 20-stairs !! It only took 2-hours. I was VERY pleased with the service. EXCELLENT JOB !!!! THANK YOU CARLOS !!!!

great company and service. we depend on them for advice, repairs, additions, and recommendations for a types of circumstances. A go to company when it comes to plumbing and heating. Scotty and Dennis are very experienced, helpful and friendly. thank you guys.

My second experience with Southwood dealing with a very serious clog affecting all water-related functions and left the tub filed with disgusting back up. My suspicion was that it was tree roots again and my guess was correct. Southwood sent Scott over first thing in the morning and he was a virtual checklist of professionalism; courteous, efficient and cheerful. Wound up needing a whole new toilet to replace the old damaged and worn out one and he picked it up, got it installed, cleared the block and cleaned up within a couple of hours. Same great experience as last time and that's why they get my highest recommendation.

We've used Southwood Plumbing several times over the last few years. Most recently we had a water heater installed (in January 2018) and Scott came out and did a great job, and it only took a couple of hours. Just over a week ago we had a house inspection as part of our house sale, and the inspector noticed there wasn't a third retaining strap on the water heater. I called Southwood and with a hour Scott came out and installed the additional strap - at no cost! I have no hesitation in recommending Southwood.

Here's an update, not sure if it'll keep the rest of my previous review...but Southwood Plumbing is fantastic and they are the only plumbers I will use. Since my last review they've installed 2 new toilets, fixed a nearly broken sink trap, and diagnosed a dishwasher problem, among other things. You really want these folks for your plumbing problems.

We have had Southward Plumbing to our home for repairs. Both time (to unclog drains), the owner showed up on time and went right to work. The first visit was to unclog a bathroom sink drain and that was done in very short fashion..no problems with that drain since. The second visit was to unclog kitchen sink drains (double sink, 1 with garbage disposal) which has been an off and on problems requiring calls to different plumbers but has never resulted in permanent fix. However, this time we are very encouraged by the time, effort etc put into unclogging this persistently difficult drain. We are very happy with the quality of attention, and work from Southward. So pleasant to work with them..would certainly recommend and of course use them again.

They are robbers in my eye. They cut a wall open to detect leak which they found right away. The contractor that had done the plumbing had to repair and patch wall and paint. They still charged 450.00! Robbery!! When I called about it they hung up on me.
Would not recommend!

It might be because of new ownership but I have placed calls with this company several days ago and they don't even have the courtesy to call me back. The same problem happened last year as well and it's become quite frustrating. I was hoping they would come and service our furnace as the unit is not working, especially during this cold month of Dec.
I can't help but think what would happen if you hired this company and they promised you a guarantee for service and parts. You would never hear back from them. Fortunately for us, I was able to acquire a ""custom service"" oriented company that corrected our problem.
I wish I could recommend Southwood Plumbing & Heating but at this point, you could not pay me to hire these guys. They wouldn't return my calls anyways.