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Approved Pro
Approved Pro

Andy Construction LLC

Basement Waterproofing, Foundation Repair, Drain Pipe Installation,

About us

We are not a big company that you have to go through all the phone calls. Owner Andy Zhang will be the one to answer the phone, provide you the bid, and supervise and inspect the work before finish. We are so confident in our work, quality, and over all experience that we don't need any money down. Our customers don't pay us anything until the work is done and customer is happy! For a house on the market, in most cases, we allow owner pay the full bill through escrow at closing. We pride ourselves in treating every customer with honestly.We looking forward to hear and serve you soon!

Business highlights

14 years of experience

Services we offer

Basements & Crawl Spaces. Install & Replace - Sump Pumps & Sewer Lines.

Amenities

Free Estimates

Yes

Warranties

Yes

Senior Discount

5%

Accepted Payment Methods

  • Financing Available
  • Check
  • Visa
  • MasterCard
Reviews
5.020 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
100%
4
0%
3
0%
2
0%
1
0%

Filter reviews by service

Showing 1-20 of 20 reviews
Chris D.
May 2025
5.0
Drain Pipe Installation
Yes, I recommend this pro
$4,000
They did a great job

Patrick B.
Jan 2025
5.0
Insulation Service
Yes, I recommend this pro
$7,496
All done well. On time and budget. Hard working crew that was very professional.

Andrew W.
Jun 2024
5.0
Basement Waterproofing, Drain Pipe Installation
Yes, I recommend this pro
I called Andy after discovering a basement leak. Andy after a few photos immediately knew the source and with some phone guidance we were able to solve the problem. He even refused my offer to pay

Michelle J.
Nov 2021
1.0
Basement Waterproofing
He can't guarantee his work. and he ask me to buy the materials that I didn't know about it.
Response from Andy Construction LLC
"[Member Name Removed], You have a water issue in the basement at back left corner. I am honestly enough to tell you the main problem you having is all the downspouts that is draining next to your house specially one at NE corner cost the issue. I sent you a bid to take care of the downspouts which is divert roof water underground to front of your property. My bid is always 100% including materials, I never ask any customers to buy their own materials. After I sent you a bid, you text me back asked me is the materials needed to use can be purchased at Lowe’s. Well, my thought when I see your text was you probably have some help want to try to do yourself. I am nice enough to text you back and tell you yes, you can get all of your materials at Lowe’s. We get our pipe 5000 feet at once every few months. There is no reason I asked any customers to get their own materials. For the guarantee, no I can’t guarantee your basement can stay dry if we take care of downspouts. But my bid is to take care of obvious issue first. I can easily give you a bid that is 5 or 10 times more to put in a footing drain in the basement with sump pump. I make more money that way. I can guarantee you for a lifetime! But that is not the correct fix or approach. For any customers read my response, i can tell you if you have any water issue in the basement. Please check all of your downspouts or where is your roof water goes or end up. 75% of house water issue can be resolved by make sure your roof water is draining away from your house. Not many other professional in this field will tell you this! Also for [Member Name Removed], I do make mistake on some issue along the way over the years. But I can tell you I didn’t make any mistake here, there is not a thing I would change the way I approach this case. The problem here is you don’t understand the way I explained to you how it work. I wish you best of luck! If you end up putting a perimeter drain in the basement, 90% or more of water going into the drain is roof water at back left/NE corner"

Jennifer H.
Feb 2021
5.0
Basement Waterproofing
Yes, I recommend this pro
I did not end up using Andy for reasons outside of him but he would be the first person that I would use and call in the future.

Uday B.
Feb 2021
5.0
Basement Waterproofing
Yes, I recommend this pro
We got a bid from Andy Construction for water-issues in our crawlspace. Of the companies that I talked to about this issue - I thought Andy provided the most objective recommendation (though it costed lesser). Other companies were recommending a sump pump. Andy recommended addressing the source of the water (downspout drainage issue). We haven't yet gotten the work completed, but would recommend Andy Construction based on the bidding process.

Jason M.
Feb 2021
5.0
Uncategorized Services
Yes, I recommend this pro
$3,350
Outstanding work and value. Andy was quick to respond and came out the next day to assess what we needed to do to improve the drainage in our crawlspace. The home is built on a sloped lot. Andy suggested a full perimeter drain install around the foundation. The work also included complete replacement of the vapor barrier. All work was performed efficiently and Andy backed it up with a lifetime warranty. I couldn't be happier with the end result and would highly recommend Andy and his crew.

Karen C.
Jan 2021
5.0
Basement Waterproofing, Drain Pipe Installation
Yes, I recommend this pro
I have a 1906 cottage in N Seattle, with an old porous foundation. Water came into the basement for the first time in 20 years. Another contractor bid the job at $12,000 after 3 site visits and almost a month. Andy came out to the house the same day I talked to him, and estimated the same job at half that price. He followed up with questions, asked about making another visit, came out again and saw that the drainpipe was disconnected at the top of the area being flooded. 75% of the roof's water was pooling against the house. He found a ladder and fixed it and isn't charging me a dime. So, no French drain, no Delta drain, no foundation treatment, no 50' of trenching, no $$$. Andy was timely, reliable, did what he said, and knows his stuff. He was a great communicator, and I feel so so lucky to have found him.

John W.
Jan 2021
5.0
Foundation Repair
Yes, I recommend this pro
Water in basement

Julie O.
Oct 2018
5.0
Basement Waterproofing
Yes, I recommend this pro
Andy's team first helped us to trouble shoot the problem and got us to a level of understanding that we had a pretty major job to do but it would be done right. We ultimately received three bids and all of them had similar solution suggestions. What made us choose Andy was a) the price was better, b) he was very knowledgeable and c) he took an iterative approach. He knew that if we could avoid this much disruption in our home by doing something less major, we would. But after doing some test patches, ultimately it was clear that we had to do the full replacement. Andy was the most understanding of our desire to try to save the tiled bathroom. Luckily his team was able to navigate around it to tie into the sump pump which saved us the bathroom floor replacement. His team of two guys spent the week here and they were timely, friendly, communicative and did a great job. We feel confident in the work and would recommend Andy to anyone facing this major issue.

Jade Z.
Jan 2018
5.0
Basement Waterproofing
Yes, I recommend this pro
I am currently building a home at Redmond. There is 6" of water inside foundation. Andy took a look at it and gave me honest opinions. He said he did not worry about it now. It seems the water was from rain because there is no roof and frame yet. I really appreciate his honesty. I can see he is a contractor I can trust.

May C.
Oct 2017
5.0
Basement Waterproofing
Yes, I recommend this pro
$350
First and foremost, I love Andy's integrity and problem-solving aptitude. I had initially thought/assumed it was drainage issue. I contacted Andy Construction through referral from a real estate agent. Andy came by to take a look of the situation situation, and gave me two options to choose from: (1) dig drench on the outside below the deck to direct storm-drain water to the street. But he couldn't guarantee that would fix the issue, and that cost was $600. OR (2) Install French-drain in the entry-foyer to direct water to the street, and that cost was going to be $2000. With already mounting expenses on other fixes and improvements, I decided to go with Option #1 for $600. This was done in summer and there was no rain to verify if the issue was fixed until recently. With a few days of consistent rain in late September, I saw that the water was still coming in. So I called Andy to come and install the French-drain. Andy asked me a few questions over the phone, and told me that he suspected the problem wasn't as serious as what I thought. He came by with one crew member, I agreed to have it cut open 2-ft drywall, and saw that in the corner, there was a small pile of sand/soil. I asked them to open the entire wall, and was confirmed that there was 2 areas of leaks - 1 was a hole on the top, another leak was through rotting nail drill onto the 2x4 for the deck fence outside above. Andy and his crew repaired the concrete hole, and advised me to repair the rotting nail drill from the deck-level. This solution costed me $350 instead of $2K, and I thank Andy for his knowledge in diagnosing the issue and the integrity to charge accordingly. Andy Construction is definitely my go-to contractor for all drainage and water leak issues!

Giannina S.
Sep 2017
5.0
Basement Waterproofing
Yes, I recommend this pro
Andy's crew installed a drainage system in my crawlspace and was fast and professional. He stands by his work and will answer any questions you might have.

May C.
Aug 2017
5.0
Drain Pipe Installation
Yes, I recommend this pro
$500
Andy was very responsive, very professional, very transparent about the solution. I appreciated his ethics, professionalism and transparency.

Jane T.
Aug 2017
5.0
Basement Waterproofing, Drain Pipe Installation
Yes, I recommend this pro
$500
The installation was fast.

Jennifer E.
Jul 2017
5.0
Basement Waterproofing
Yes, I recommend this pro
$3,250
We will know more in the winter when it rains, but the work done went exceptionally well!

John K.
Jun 2017
5.0
Basement Waterproofing
Yes, I recommend this pro
$1,000
Well. Three months later you cannot tell where the digging took place.

Ashwini B.
Apr 2017
5.0
Basement Waterproofing, Drain Pipe Installation
Yes, I recommend this pro
$3,300
They came in and put plastic on the floor and kept the door closed as as much as possible thus not letting heat out of the house. All the work after went smoothly i.e. quick and neat. Everytime I had a question, Andy stopped and answered every concern we had. He also guaranteed the water clogging wont happen and asked us to contact him on direct line if ever we have a problem. At the end, on request, he also explained to us where and how things work and where the water will go in future. Time was scheduled at 10 am. Andy and his crew came 1.5 hours earlier than the expected time without prior information which caused me to get up and rush to the door half awake. That was the only complain I had.

Mark C.
Mar 2017
5.0
Basement Waterproofing, Foundation Repair + 1 more
Yes, I recommend this pro
$4,850
Andy and his crew were timely, courteous and professional. His solution worked exactly as he described it would. Problem solved.

Mary B.
Jan 2017
5.0
Basement Waterproofing
Yes, I recommend this pro
$3,500
The team was right here then wen needed them. He came out immediately and the performed the work under difficult situations due to weather. The got it done within 2-3 days. They were honest, prompt. I think very reasonably priced for the work performed. They were very easy to work with and reliable.

Terry C.
Aug 2016
5.0
Foundation Repair
Yes, I recommend this pro
$1,500
Andy responded to my request for a bid within 24 hours of contact, then came out to review the job at a date and time that was very convenient for my schedule. He gave me an estimate and was willing to negotiate a bit. He then scheduled the work to be done just a few days later. The work was completed within the time frame he gave me, and looked exactly as he had described it would look. This was important because the repair is very visible as it was in the garage of my split level home. He followed up after the work was complete to ensure I was satisfied. He cleaned up after all the work was done, and his communication throughout the entire process was fantastic - clear, timely, and professional.  I would not hesitate to hire him for any other work and enthusiastically recommend him to others. I couldn't be happier!

Amy H.
Jun 2016
5.0
Basement Waterproofing, Foundation Repair
Yes, I recommend this pro
$800
unknown

Robert L.
May 2016
5.0
Basement Waterproofing, Drain Pipe Installation
Yes, I recommend this pro
$712
Job went great.  Andy is friendly, professional, reliable and honest (e.g. he didn't push expanded scope of french drains, etc--though it would be difficult for the average homeowner to know if that's not needed). I would definitely call him again if the need arose.

CHERYL S.
Jan 2016
5.0
Basement Waterproofing, Foundation Repair + 1 more
Yes, I recommend this pro
$465
The Zoeller sump pump in our basement had stopped working during a torrential storm, right before the holidays.  I had 3 different plumbers/contractors come to provide estimates.  
 
Other plumbing repair companies wanted to redesign the entire system for $1500 or couldn't get us scheduled for 30 days.  Andy and his crew were very responsive.
Andy addressed the issue - a broken pump - and did not try to coerce me into more work than was necessary.  HIs team quickly installed the sump pump, installed a new check valve, and hauled away the old material.  The system works beautifully and much quieter than before.
We will definitely contact Andy in the future and we highly recommend him.
Thank you!

Belinda D.
Dec 2015
5.0
Foundation Repair
Yes, I recommend this pro
$7,500
Andy and his team are punctual and friendly. Andy is honest. He provided an extensive list of references. They gave him high praise.
His bid was higher than others but I'm glad I chose him. (I had 6 bids in total) 
He also answers his phone immediately so there is no playing phone tag.

Licensing

Bonded

Insured

Licensed*

Trade License Number

ANDYCCM895OM

Trade License Locale

Washington

Trade License Authority

Washington: Contractors

Trade License Expiration

09/14/2023

State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.

*Contact business to see additional licenses.

FAQ

Andy Construction LLC is currently rated 5.0 overall out of 5.

Monday: 8:00 AM - 7:00 PM Tuesday: 8:00 AM - 7:00 PM Wednesday: 8:00 AM - 7:00 PM Thursday: 8:00 AM - 7:00 PM Friday: 8:00 AM - 7:00 PM Saturday: 9:00 AM - 4:00 PM Sunday: 9:00 AM - 4:00 PM

Andy Construction LLC accepts the following forms of payment: Financing Available, Check, Visa, MasterCard

Yes, Andy Construction LLC offers free project estimates.

No, Andy Construction LLC does not offer eco-friendly accreditations.

No, Andy Construction LLC does not offer a senior discount.

No, Andy Construction LLC does not offer emergency services.

Yes, Andy Construction LLC offers warranties.

Andy Construction LLC offers the following services: Basements & Crawl Spaces. Install & Replace - Sump Pumps & Sewer Lines.