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Find Septic system installers and replacers in Seattle

"Do not hire. They will take advantage of you. We had them out to pump our septic system. They told us our drain field needed a jet-vac treatment (quoted at $3600) and possibly a new pump (quoted at $5000). They filed a report with the county saying that our pump was deficient and we got a letter in the mail saying that we had to take care of it. Those prices seemed really expensive to me so I called around. Multiple other septic companies told me not to hire Septic Solutions as they had often get calls like this from customers questioning prices and if the recommended services are really needed. I had { remove company name} Septic come out for an inspection instead. { remove company name} said that everything was working perfectly and if the jet-vac and pump were needed { remove company name} would charge 5000 total. I had to pay for an extra inspection to get things cleared with the county. Do not hire Septic Solutions. They were not honest and preyed on my lack of septic knowledge. I will be using { remove company name} Septic in the future."

Whitney W on August 2025

We pride our company on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Do not hire. They will take advantage of you. We had them out to pump our septic system. They told us our drain field needed a jet-vac treatment (quoted at $3600) and possibly a new pump (quoted at $5000). They filed a report with the county saying that our pump was deficient and we got a letter in the mail saying that we had to take care of it. Those prices seemed really expensive to me so I called around. Multiple other septic companies told me not to hire Septic Solutions as they had often get calls like this from customers questioning prices and if the recommended services are really needed. I had { remove company name} Septic come out for an inspection instead. { remove company name} said that everything was working perfectly and if the jet-vac and pump were needed { remove company name} would charge 5000 total. I had to pay for an extra inspection to get things cleared with the county. Do not hire Septic Solutions. They were not honest and preyed on my lack of septic knowledge. I will be using { remove company name} Septic in the future."

Whitney W on August 2025


Freedom Excavation

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Freedom Excavation

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
11 local quotes requested
6 years of experience

Freedom Excavation is committed to excellence every aspect of our business. We uphold a standard of integrity, bound by fairness, honesty, and professional responsibility. Our distinction is the quality of service we bring to our customers as well as our ability to give you a quick, fair, and accurate estimate. Accurate knowledge of our trade, combined with ability is what makes is true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

Freedom Excavation is committed to excellence every aspect of our business. We uphold a standard of integrity, bound by fairness, honesty, and professional responsibility. Our distinction is the quality of service we bring to our customers as well as our ability to give you a quick, fair, and accurate estimate. Accurate knowledge of our trade, combined with ability is what makes is true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.


"there is a quick summary at the bottom if you want to skip the details. I have received service from this company twice. The first time I had a leak in a bathtub. They removed the drain with a Dremel since it was stuck, then they were about to leave to go to home depot to get plumber's putty, but I had some so they were able to get the part quickly replaced. Maybe this is a bit of a fluke, but that seems like a fairly basic thing to have when going to fix this kind of leak. Overall it was a positive interaction so I didn't think much of it. I recently bought a bidet on amazon. It arrived and I put it in. The problem was that I couldn't connect the toilet to the wall since the hose was a different size then the wall piece. The directions wanted me to remove the valve stem from the wall and replace it with their own. I called A Advanced because when it comes to plumbing, i would rather leave that to the professionals. I had called it a hose bibb because I just didn't know what it was called. someone called me back and asked me to explain in better detail what i needed done. I explained that the "hose bibb" needed to be replaced for me to connect my toilet and that I had the part to do it. from that conversation i received an estimate for $280.87. I was at work that day so couldn't be there, but my wife was there. The plumber that arrived worked for a while on the toilet, then went to home depot to find parts, then came back to the house and worked on it longer, then finally decided that it couldn't be done. We were charged $768.14 for nothing to get fixed. I called them to figure out what happened, I called near closing so they were not able to get a hold of anyone and it waited until the next week for me to talk to someone. I found out that the plumber never received the bag of parts, it was about 2 feet away in the sink. the same plumber came out and looked at it again, and went to home depot again. I was at work and managed to contact him while he was at home depot. I was told that the problem was with the thread depth and that there was no way to install this Chinese toilet without special ordering a part, and if I wanted him to keep working on it he was going to have to charge me more money. I declined. (Its not a Chinese toilet, the company that makes them is out of California.) At this point I was beyond frustrated. I left work early, drove home, went to home depot with the parts I needed to connect, and found a perfect fit within about 10 minutes of looking. I bought a Hex Bushing 3/4 in MIP x 1/2 in FIP for $7.75. I attached it to the included hose and then attached that to the valve stem. and everything worked. Home depot made it easy to find since both connectors were the same type. I just needed to find the appropriate brass adapter. the threads on the toilet hose are identical to the threads on a US water heater. I called A Advanced back and presented my evidence. I was asked what it would take to make this right. I asked for some of my money back. I can understand getting charged for the plumber going out to my house without a full understanding of what is going on. but at no point did he ever tell my wife that he was going way over the estimate. this is the exact response i got back. "I spoke with my COO and my foreman due to the amount of time we spent on the project we are unable to provide any sort of refund. I understand that is not something you want to hear but that is our decision." _____________________________________________ to summarize: - every time this company has come out to my house they have needed to go to Home Depot during the visit. - I was charged nearly 3 times the estimate with no work done and no warning that the bill was piling up. - the plumber was never able to install the toilet despite multiple trips to home depot - I installed the toilet with a $7 adapter i found at home depot in about 10 minutes. (I am not a plumber) - The company chose to not refund me anything If a plumbing company needs to go to home depot every time they do a house call, that is a company that is not prepared at best, and a scam company at worst."

Justin M on December 2024

Through unique technology, experience and compassion, we serve our customers while creating and maintaining a reputation of excellence. We service: Pierce County, King County, Thurston County, and Kitsap County.

"there is a quick summary at the bottom if you want to skip the details. I have received service from this company twice. The first time I had a leak in a bathtub. They removed the drain with a Dremel since it was stuck, then they were about to leave to go to home depot to get plumber's putty, but I had some so they were able to get the part quickly replaced. Maybe this is a bit of a fluke, but that seems like a fairly basic thing to have when going to fix this kind of leak. Overall it was a positive interaction so I didn't think much of it. I recently bought a bidet on amazon. It arrived and I put it in. The problem was that I couldn't connect the toilet to the wall since the hose was a different size then the wall piece. The directions wanted me to remove the valve stem from the wall and replace it with their own. I called A Advanced because when it comes to plumbing, i would rather leave that to the professionals. I had called it a hose bibb because I just didn't know what it was called. someone called me back and asked me to explain in better detail what i needed done. I explained that the "hose bibb" needed to be replaced for me to connect my toilet and that I had the part to do it. from that conversation i received an estimate for $280.87. I was at work that day so couldn't be there, but my wife was there. The plumber that arrived worked for a while on the toilet, then went to home depot to find parts, then came back to the house and worked on it longer, then finally decided that it couldn't be done. We were charged $768.14 for nothing to get fixed. I called them to figure out what happened, I called near closing so they were not able to get a hold of anyone and it waited until the next week for me to talk to someone. I found out that the plumber never received the bag of parts, it was about 2 feet away in the sink. the same plumber came out and looked at it again, and went to home depot again. I was at work and managed to contact him while he was at home depot. I was told that the problem was with the thread depth and that there was no way to install this Chinese toilet without special ordering a part, and if I wanted him to keep working on it he was going to have to charge me more money. I declined. (Its not a Chinese toilet, the company that makes them is out of California.) At this point I was beyond frustrated. I left work early, drove home, went to home depot with the parts I needed to connect, and found a perfect fit within about 10 minutes of looking. I bought a Hex Bushing 3/4 in MIP x 1/2 in FIP for $7.75. I attached it to the included hose and then attached that to the valve stem. and everything worked. Home depot made it easy to find since both connectors were the same type. I just needed to find the appropriate brass adapter. the threads on the toilet hose are identical to the threads on a US water heater. I called A Advanced back and presented my evidence. I was asked what it would take to make this right. I asked for some of my money back. I can understand getting charged for the plumber going out to my house without a full understanding of what is going on. but at no point did he ever tell my wife that he was going way over the estimate. this is the exact response i got back. "I spoke with my COO and my foreman due to the amount of time we spent on the project we are unable to provide any sort of refund. I understand that is not something you want to hear but that is our decision." _____________________________________________ to summarize: - every time this company has come out to my house they have needed to go to Home Depot during the visit. - I was charged nearly 3 times the estimate with no work done and no warning that the bill was piling up. - the plumber was never able to install the toilet despite multiple trips to home depot - I installed the toilet with a $7 adapter i found at home depot in about 10 minutes. (I am not a plumber) - The company chose to not refund me anything If a plumbing company needs to go to home depot every time they do a house call, that is a company that is not prepared at best, and a scam company at worst."

Justin M on December 2024


"Mark was prompt, knowledgeable, and did a great job. I also appreciated the fair price he gave me."

Brian S on March 2023

Clearing and removal of brush, excavation, grading, underground utilities, storm drainage, ditches, driveway gravel, site preparation for residential home, garage or shop. Emergency work, storm clean up, demolition

"Mark was prompt, knowledgeable, and did a great job. I also appreciated the fair price he gave me."

Brian S on March 2023


Avatar for Extra Mile Construction LLC

Extra Mile Construction LLC

5.00(
2
)
Approved Pro

Extra Mile Construction LLC

5.00(
2
)
Approved Pro
25 years of experience
Free onsite estimate

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Job was done well. Will be having them do more work in the future including installing our septic, drainage and land scraping. Prices are reasonable. Would highly recommend this business. "

Laura L on May 2025

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Job was done well. Will be having them do more work in the future including installing our septic, drainage and land scraping. Prices are reasonable. Would highly recommend this business. "

Laura L on May 2025


Avatar for Beacon Plumbing & Mechanical INC

Beacon Plumbing & Mechanical INC

5.00(
6
)
Approved Pro

Beacon Plumbing & Mechanical INC

5.00(
6
)
Approved Pro
Customers say: Quick response
29 local quotes requested
26 years of experience

Beacon Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"The tech explained everything and was very polite."

Michelle B on April 2025

Beacon Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"The tech explained everything and was very polite."

Michelle B on April 2025


Avatar for Iron Earth Construction LLC

Iron Earth Construction LLC

5.00(
3
)
Approved Pro

Iron Earth Construction LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 local quotes requested

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

sally k on September 2023

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our

"Very accommodating and great service and product"

sally k on September 2023


Lee’s Sanitation Service Inc

4.82(
67
)
Approved Pro

Lee’s Sanitation Service Inc

4.82(
67
)
Approved Pro
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
61 local quotes requested

Founded in 1950, Lee’s Sanitation Service has been a leader in sanitation services in Washington’s King and Pierce Counties for more than six decades. We are a small local business with few employees dedicated to serving our community and protecting our environment. Additional phones: Pierce County: 253-777-1750, King County: 253-245-1080.

"James from Lee's Sanitation Service showed up exactly on time and pumped our 1100 gal solids tank. It was a quick and easy job and the price was optimal."

Daryl H on October 2020

Founded in 1950, Lee’s Sanitation Service has been a leader in sanitation services in Washington’s King and Pierce Counties for more than six decades. We are a small local business with few employees dedicated to serving our community and protecting our environment. Additional phones: Pierce County: 253-777-1750, King County: 253-245-1080.

"James from Lee's Sanitation Service showed up exactly on time and pumped our 1100 gal solids tank. It was a quick and easy job and the price was optimal."

Daryl H on October 2020


Dano's Septic Tank Pumping

4.60(
30
)
Approved Pro

Dano's Septic Tank Pumping

4.60(
30
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
35 local quotes requested

Family owned and operated, Dano's Septic also provides services for portable toilets and rentals, single units, ADA handicap approved portable units and stand alone wash stations. Our technicians are friendly, professional, certified and are ready to provide you with the best septic service to keep your septic out of site and out of mind.

"ORGINIAL POST: DO NOT USE THIS COMPANY!!! After spending over $2,000 on pumping, inspection and camera work, I had one simple request- WAIT 30 DAYS BEFORE SUBMITTING FINDINGS TO THE COUNTY! We were trying to work the problem. I called TWICE about this and was told both times, no problem, we will wait. They submitted it this morning. Because they did not respect my wishes to wait, I now have to pay over $20,000 through the county when we had a plan in place to avoid that and get it fixed independently. Go with a company that follows instructions, not absolutely ruins your life. Thanks for the 10 year debt I will now have due to your negligence. My realtor and contractor will be referring all other agents and all clients elsewhere, and notifying them all of this unprofessional behavior. EDIT: Here's how I would have expected Serena, the office manager I spoke to today to enter the conversation: yes, you're absolutely right, we did breach agreement, how can we make it right? Here's what happened: per her: "there was a human error that was not our fault. The result would have been the same no matter what" (no it would not have and she has no way of knowing that). "I have you on record asking not to submit it at all" (I told her yes I did say that, then asked what's the extension period, and we're getting off track). "Here's the history of your septic system" again no, we're getting off track. You admitted three times in this conversation you breached our verbal contract. You say the results would have been the same no matter what, but that's absolute garbage- no way she'd know that. If you truly have nothing to hide, and know you messed up (which you admitted to) send me the phone recordings I requested not respond "we will be happy to do that upon getting subpoenaed.""

Lauren B on March 2025

Family owned and operated, Dano's Septic also provides services for portable toilets and rentals, single units, ADA handicap approved portable units and stand alone wash stations. Our technicians are friendly, professional, certified and are ready to provide you with the best septic service to keep your septic out of site and out of mind.

"ORGINIAL POST: DO NOT USE THIS COMPANY!!! After spending over $2,000 on pumping, inspection and camera work, I had one simple request- WAIT 30 DAYS BEFORE SUBMITTING FINDINGS TO THE COUNTY! We were trying to work the problem. I called TWICE about this and was told both times, no problem, we will wait. They submitted it this morning. Because they did not respect my wishes to wait, I now have to pay over $20,000 through the county when we had a plan in place to avoid that and get it fixed independently. Go with a company that follows instructions, not absolutely ruins your life. Thanks for the 10 year debt I will now have due to your negligence. My realtor and contractor will be referring all other agents and all clients elsewhere, and notifying them all of this unprofessional behavior. EDIT: Here's how I would have expected Serena, the office manager I spoke to today to enter the conversation: yes, you're absolutely right, we did breach agreement, how can we make it right? Here's what happened: per her: "there was a human error that was not our fault. The result would have been the same no matter what" (no it would not have and she has no way of knowing that). "I have you on record asking not to submit it at all" (I told her yes I did say that, then asked what's the extension period, and we're getting off track). "Here's the history of your septic system" again no, we're getting off track. You admitted three times in this conversation you breached our verbal contract. You say the results would have been the same no matter what, but that's absolute garbage- no way she'd know that. If you truly have nothing to hide, and know you messed up (which you admitted to) send me the phone recordings I requested not respond "we will be happy to do that upon getting subpoenaed.""

Lauren B on March 2025


Evergreen Sanitation Inc

4.35(
103
)
Approved Pro

Evergreen Sanitation Inc

4.35(
103
)
Approved Pro
Customers say: Super punctual
263 local quotes requested
68 years of experience

Evergreen Sanitation does it all. We specialize in all aspects of onsite systems. We also provide grease trap pumping for restaurants (800) 433-1678. Renton Septic Inspections, AAA Septic Service, A Septic Pumper, Coastal Environment, East Hill Septic Service, Eastside Septic Service, Enumclaw Septic Service, Frontier Septic Service, Greenhaus Portable Restrooms, Issaquah Septic Service, J J Jackson Septic Service, Long Septic Service, Lyon Septic Service, Maple valley Septic Service, Sani-Mart Septic Service, Sky Valley Septic Service, Tandem Service Corporation Inc, Vans Septic Service. Additional phone numbers - (206) 362-6998, (206) 362-6998, (206) 622-7070, (253) 630-5262, (253) 852-0550, (360) 336-2009. Additional DBAs - Additionl DBAs - A A A Septic Service, A Septic Pumper, Coastal Environment East Hill Septic Service, Eastside Septic Service, Enumclaw Septic Service & Frontier Septic Service. See BBB for additional phone nubers and DBAs.

"Great. It was not an easy job but they went the extra mile to get it done. Thanks."

Rick W on May 2021

Evergreen Sanitation does it all. We specialize in all aspects of onsite systems. We also provide grease trap pumping for restaurants (800) 433-1678. Renton Septic Inspections, AAA Septic Service, A Septic Pumper, Coastal Environment, East Hill Septic Service, Eastside Septic Service, Enumclaw Septic Service, Frontier Septic Service, Greenhaus Portable Restrooms, Issaquah Septic Service, J J Jackson Septic Service, Long Septic Service, Lyon Septic Service, Maple valley Septic Service, Sani-Mart Septic Service, Sky Valley Septic Service, Tandem Service Corporation Inc, Vans Septic Service. Additional phone numbers - (206) 362-6998, (206) 362-6998, (206) 622-7070, (253) 630-5262, (253) 852-0550, (360) 336-2009. Additional DBAs - Additionl DBAs - A A A Septic Service, A Septic Pumper, Coastal Environment East Hill Septic Service, Eastside Septic Service, Enumclaw Septic Service & Frontier Septic Service. See BBB for additional phone nubers and DBAs.

"Great. It was not an easy job but they went the extra mile to get it done. Thanks."

Rick W on May 2021

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FAQs for septic system installation and replacement projects in Seattle, WA

The smallest standard septic system uses a 500-gallon tank, which costs between $875 and $1,150 installed. This size works well for single-occupant dwellings with minimal wastewater production. However, many local regulations specify minimum tank sizes, so check with your building department before committing to this compact option. Some jurisdictions require at least 750 gallons regardless of home size to ensure adequate waste processing capacity.

The installation timeline varies based on site conditions, permit processing, and contractor schedules. The process includes obtaining permits, conducting soil tests, excavation, tank placement, leach field construction, and final connections. Weather conditions, soil challenges, and inspection scheduling can all affect the overall timeline. It's wise to begin planning well in advance of when you need the system operational.

The most economical approach is to install a conventional anaerobic system with a plastic tank. To minimize costs while maintaining legality, obtain multiple quotes from licensed installers, consider scheduling during their slower seasons, and handle basic site preparation yourself. Never skip permits or required testing to save money—illegal installations can result in significant fines and mandatory removal, ultimately costing far more than doing it right initially.

Regular pumping helps prevent system failures and extends operational life. Most small systems require pumping every three to five years, though frequency depends on household size and usage patterns. Pumping services cost between $290 and $530, making this maintenance expense relatively minor compared to potential repair costs ranging from $500 to $2,600 for neglected systems. Establishing a regular maintenance schedule based on your installer's recommendations helps avoid costly emergency services.

The Seattle, WA homeowners’ guide to septic system installations and replacements

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