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    Average homeowner rating
  • Verified reviews icon19
    Verified septic tank services reviews

Top-Rated Septic tank pros in Gilroy - Updated Nov 2026

Avatar for Central Coast Engineering & Development INC
Central Coast Engineering & Development INC
5.0(
14
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+1 more

Serving Gilroy, CA and surrounding areas

Approved

In business since 2023

Free estimates

Customers say: Quality work

"I would give Austyn 100 stars if I could. He made the project go smoothly. His personality, level headedness, his problem solving skills, knowledge of his craft and the ability to work with others so appreciated. While excavating for the septic Leitchfield, I had him do other work on the property, moving earth and building a retaining wall. When he discovered a huge cavern where earth had eroded to the point of danger, he immediately ordered everything and had it fixed in a few days. He was here on time, and he stayed on the job until it was finished. Here ever day. That isn't always the case, especially when unexpected things (like a cavern) show up and the job takes longer than planned. Everything turned out perfectly, we passed the city inspections on the first try. You can't go wrong with Austyn, he is someone you can trust."
Response time1 day
2 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for TRIO Heating, Air & Plumbing
TRIO Heating, Air & Plumbing
5.0(
5
)
Septic System - Install or ReplaceSeptic System - Repair

Serving Gilroy, CA and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"My experience with Trio Heating and Air for my air conditioning installation was exceptional. From start to finish, they demonstrated professionalism and efficiency. The technicians arrived promptly and were well-prepared, guiding me through the process and recommending the perfect system for my home. Throughout the installation, they worked diligently, respecting my space and ensuring everything was installed correctly. Their clear communication and transparent pricing made the experience stress-free. Now, my home is consistently cool and comfortable, and I couldn't be happier with the results."
Heating & Air Conditioning Installations
Heating & AC Install
Heating & AC Install
Heating & AC Install
Heating & AC Install

+101

Response time4 hrs
Response rate93%
10 neighbors recently requested a quote
Superior Sanitation, LLC
New to Angi
Septic Tank - Clean or Pump OutSeptic Tank - Clean or Pump Out - For Business

Serving Gilroy, CA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

Superior Sanitation, LLC is your industry expert in Gilroy and the surrounding areas. We pride ourselves on our extreme professionalism, integrity, attention to detail. We only make promises that we know we will deliver on. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!

Response time1 day
Avatar for J Drains Rooter Service
J Drains Rooter Service
4.8(
13
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Gilroy, CA and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"It was great luck that Jason of J Drains was working on a job near my home and was able to come by after he finished that job to check my hot water heater. He fixed it right away because he spotted what was wrong quickly. Jason was very professional and polite. I recommend this company!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+4

Recommended by91%of homeowners
Avatar for Hastings Construction, Inc.
Hastings Construction, Inc.
5.0(
10
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For Business

Serving Gilroy, CA and surrounding areas

In business since 1991

Free estimates

Offers commercial services

"Total industrial auto building renovation including concrete, electrical, HVAC, lighting, roof, etc. They did an excellent job. Always on time and on budget. They handled all of the plans, engineering and permitting. Great communication and the staff, which includes in-house design, is incredible. I am already using them on another job and would absolutely recommend them again."
Roth Septic Tank install
Septic System Installs
Septic System Installs
Septic System Installs
Septic System Installs

+17

Response time2 days
Recommended by90%of homeowners
Showing 1-10 of 30
Septic Tanks FAQs, answered by experts

You may want to increase the size of your leach field, for instance, if you add on to your home or install more bathrooms in your house. You can make your leach field larger by installing more pipes or expanding the area of the field itself. Improving the soil quality in the drain field can also make it more effective without increasing the area.

A mound septic system, when properly maintained, can last between 20 and 25 years on average—though some last longer or malfunction sooner than that. The most important part of maintenance is getting an annual inspection of the vital parts of the system to ensure they’re in proper working order and not too backed up with sewage.

Most homeowners know there’s a septic system problem when they can smell one. However, this isn’t exactly a scientific deduction method. Consider some of the other signs: standing water or constantly damp earth in the drainage area, toilets and sinks that won’t drain or frequently back up, and loud plumbing. You really need to be on top of routine maintenance with septic systems in order to avoid such unpleasant symptoms of a septic issue. 

Common signs that a septic tank is full include plumbing issues, odors, and changes in your yard. You may notice wastewater or sewage backing up into your home's drains, or that sinks, tubs, and toilets are draining slowly. Gurgling or bubbling sounds from the pipes are also a key indicator. Outside, you might smell foul sewage odors around your house or the septic tank area. Look for pooling water, spongy soil, or a marshy environment around the drain field. Another tell-tale sign is a patch of grass over the septic system that is suddenly lusher and greener than the rest of your lawn. If you notice any of these signs, you should contact a septic professional for an inspection and pumping.

Perc rates vary dramatically, and a good perc rate could be anything from 5 minutes per inch of drainage to 60 minutes per inch. The lower the number, the faster your system will drain and the more effective it will be. A 60-minute-per-inch drain rate is the highest number considered to be good, or even allowable, draining.

The Gilroy, CA homeowners’ guide to septic tank services

From average costs to expert advice, get all the answers you need to get your job done.