Logo of Mt. Si Contracting LLC

Mt. Si Contracting LLC

  • Renton
  • Commercial Roofing
  • Industrial Roofing
  • Residential Roofing
  • 24/7 Emergency Repairs
  • Financing Available
Hours
Mon7:30 AM - 9:00 PM
Tue7:30 AM - 9:00 PM
Wed7:30 AM - 9:00 PM
Thu7:30 AM - 9:00 PM
Fri7:30 AM - 9:00 PM
Sat7:30 AM - 9:00 PM
Sun7:30 AM - 9:00 PM
About the Business

At Mt. Si Contracting LLC, located in Renton, Washington, we pride ourselves on our versatility and technical expertise in managing both residential and commercial projects. Our comprehensive range of services includes roof installation, roof replacement, skylight installation and repair, as well as gutter installation and cleaning. This allows us to handle complex projects from start to finish, ensuring that every detail is meticulously attended to. We are recognized for our organized approach and consistency in delivering high-quality results.

Our team is dedicated to providing durable solutions that add long-term value for our clients. Whether it’s a new roof or a detailed gutter system, we coordinate every aspect of the project to ensure thorough execution and client satisfaction. Serving Renton and the surrounding areas, we are committed to making your vision a reality with precision and reliability.

What people say about “Mt. Si Contracting LLC”?

Customer feedback is overwhelmingly positive regarding Mt. Si Contracting, particularly praising the timeliness, professionalism, and quality of workmanship. Many reviewers highlight exceptional communication, stating that Nate and his team are responsive and attentive throughout the project. Several customers express satisfaction with the final results, appreciating the attention to detail and the ability to tailor projects to their specific needs. However, there is a notable negative review that raises concerns about communication and project delays, which may lead potential clients to approach with caution. Overall, while the majority of reviews commend the service provided, the serious issues raised in one review should be considered.

What Users Like The Most
  • They arrived on time and went above and beyond to ensure the fence was fixed correctly.
  • The entire experience was smooth, professional, and high quality.
  • Nate was very knowledgeable about the products and options.
  • They worked around our rainy NW season this year and always stayed in communication with me.
  • The communication was prompt and clear.
What Users Like The Least

Customers are fully satisfied

Recommended Reviews
Overall Company Rating
Excellent 4.7
Out of 19 reviews
5 stars
4 stars
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1 stars
Show first:
Nick Evans
May 14, 2025

Nathan did an amazing job. They arrived on time and went above and beyond to insure the fence was fixed correctly. Highly recommend!

Bobby Cyr
Apr 30, 2025

We had Nathan decide to put up a fence for us.. fix another pole that was on another side of our yard that was attached to a fence that was holding up one of our bigger Wisteria Vines. We hired him in January with an expected finish date of early February it is now April in our side fence is absolutely ruined because of the lack of communication and urgency.. although he said that painting the fence was part of our overall cost he's refusing to do that now as well I would highly recommend contacting me before you hire this person and their job

Joseph Quinn
Apr 9, 2025

I recently hired Mt Si Contracting for a home project, and I couldn’t be more impressed. From start to finish, the entire experience was smooth, professional, and high quality. Nate, in particular, was fantastic to work with—clear communication, reliable, and genuinely invested in making sure the job was done right. It’s rare to find a company that combines skill, professionalism, and great customer service, but Mt Si Contracting delivers on all fronts. Highly recommend!

Miles Stewart
Apr 9, 2025

Nate rebuilt our collapsed fence and it looks as good as new. He was on-time, worked fast, and charged a very reasonable price. Very honest, humble, and trustworthy. I would hire Nate again in a flash if I needed to. Very highly recommended!

Lou DeCola
Nov 24, 2024

Thanks to Nathan at Mt. Si Contracting. He came out really quick to help clear a huge tree that fell in the storm. He was courteous and quick. Great job. Will definitely be calling again.

Ashlee Langford
Feb 5, 2024

Nate built a fence on our property and we are so incredibly pleased with his work! He worked with us on the design and layout, and it turned out even better than we imagined. Nate was so easy to work with, communicative, and friendly. He and his team worked through all kinds of weather conditions and navigated our hilly, wooded terrain with no problem. We’re looking forward to scheduling more projects with Mt Si!

Gautham Rajasekar
Dec 29, 2023

Nate and his team did a great job helping fix our fence. They were very prompt with their service and their prices are very reasonable for great quality work. Will surely recommend Mt Si contracting to friends and neighbors. Looking forward to calling them again for doing more back yard upgrades in the summer. :)

Mike D.C.
Nov 5, 2023

Nate does a fantastic job.He is detailed, professional and fair. He it a true craftsman in that he has the skills and dedication to get your job not just done but done to an very high quality. Also he cleans up after the job and makes it all look amazing. We are really happy with his work and look foward to future projects with him. Highly recommend!

Amy A
May 12, 2023

Nate and his team were amazing to work with! They remodeled our deck using composite decking. Nate was very knowledgeable about the products and options. He allowed us to tailor it to our preferred design. In addition he brought our deck up to current code and safety. It’s stunning! Delays on materials meant they had to shift their schedule but Nate and his team were very professional and easy to work with. Using him for our roof next!!! Highly recommend for quality and value. Cannot say enough good things about this company and Nathan.

Sheri Rogers
Nov 15, 2022

Nathan responded immediately to my inquiry. We needed part of our yard fenced off. He listened to what we wanted and did exactly what we asked for. He and his crew were always on time, kept in touch through the project and left our yard all cleaned up at project completion. The work was really professional and we are very happy! Sheri Rogers

Clark Ennis
Sep 27, 2022

Nate and his team did a great job on our deck! They really went above and beyond and took special care with the details. His crew were some awesome guys that treated each other and us (the customer) with respect. We are so happy with the end result!

Trish
Jul 8, 2022

Mt. Si Contracting installed new front gates on both sides of my house and they turned out beautifully. They worked around our rainy NW season this year and always stayed in communication with me. This company is professional, reasonable and they know what they're doing.

Eric Behrens
May 16, 2022

I couldn’t recommend them more!
We had Mt Si Contracting demolish our old deck and construct a new wood deck from plans we had drawn up for our permit. As well as replacing a gate and fence.
Nate and his crew did an amazing job! The communication was prompt and clear. The crew was respectful and on time.
But what really has impressed me was their craftsmanship! Just superb work.
We had a great experience. You should give them a shot. We are so glad we did!

Chelsea Behrens
May 14, 2022

Nate and his team took down our old deck and built a new deck, according to the plans we had drafted by our engineer. The deck turned out amazing - better than we imagined! It's built extremely well with some extra-special touches, crafted by Nate and his team. They also helped us replace a gate and a fence - these turned out to be designer-quality and match the deck too. This team is professional, courteous, communicative, and thoughtful. Nate went above and beyond to ensure a positive customer experience.

Munugeti's Home
Mar 3, 2022

Nate & team helped us with a new Fence. Very thorough with their work. If you are looking for a high quality work , at good value for your Money, Nate is your bet.
Nate has an eye for detail, perfection. Since it was our Front fence , we were really focussed on getting it right & to blend well with our architecture of building.. Nate did a seamless job with his thought process & execution.

Even his team is quality conscious.. They suggested few repairs to my existing new deck stairs, to increase the longevity..

Overall , great Experience & someone I would hire again in a heartbeat.

Stephanie Piorunski
Mar 2, 2022

We are very pleased with the fence that Nate & his team built. We also asked them to dig out some massive concrete footings, and they managed to do that too. The final result looks really good. I felt like communication once the project was underway could have been a little better, and when I mentioned it to Nate he was very responsive. Overall, we are very happy with our new fence and the work Mt. Si Contracting did for us, and we would call them first if we ever need any other fencing work done.

Raghu Ch
Mar 2, 2022

We have used Mt. Si contracting for revamping our large deck (1000+sft) with a new board and railing. We had a great experience in terms of the options we had on the board board, design of cable railing and design of a side deck we had for our hot tub. They have been very good from a costing point of view as well as observing little changes in their original estimation. I really appreciate Nat and his team for the great work.

Cifeng Fang
Feb 28, 2022

Nate helped us to build a gorgeous deck with composite deck boards, concrete patio and a pergola with clear roofing. He is responsive throughout the project and address the project based on our requirements.
I am impressed by how detailed and efficient he and his crews were.
I would highly recommend him for one that would like to get their project done professionally.

Sid Shah
Feb 28, 2022

Nate is absolutely awesome and is a perfectionist. We've got help from his team for various projects in the house and he has been nothing but stellar. Highly recommend.

Call us and get a quote right now Show phone number
137 locals recently requested a quote
  • Renton
  • Commercial Roofing
  • Industrial Roofing
  • Residential Roofing
  • 24/7 Emergency Repairs
  • Financing Available
Hours
Mon7:30 AM - 9:00 PM
Tue7:30 AM - 9:00 PM
Wed7:30 AM - 9:00 PM
Thu7:30 AM - 9:00 PM
Fri7:30 AM - 9:00 PM
Sat7:30 AM - 9:00 PM
Sun7:30 AM - 9:00 PM
We Answer Frequently Asked Questions
Pricing questions
1. What is the average roof replacement cost for a residential home?
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The average roof replacement cost for a residential home typically ranges from $7,000 to $15,000, depending on factors such as roof size, chosen materials, roof pitch, and labor rates in your area. Premium materials or complex designs may increase the price.

2. How much does it usually cost to replace the roof of a commercial building?
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The cost to replace the roof of a commercial building typically ranges from $5 to $12 per square foot, depending on several factors such as roof size, material, labor rates, building type, and local code requirements.

3. What factors affect the overall roof repair cost?
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Several factors influence roof repair cost, including the extent of the damage, roof accessibility, material type, labor costs, and whether it’s a general repair or an emergency fix. Minor repairs can start around $150–$400, while major repairs may exceed $1,500.

4. What is the typical roof leak repair cost, and how is it calculated?
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Roof leak repair cost generally ranges from $300 to $800, depending on the size and location of the leak, the materials required, and labor intensity. Complex leaks involving structural repairs or interior damage will cost more.

5. What is the average flat roof repair cost for commercial buildings?
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Flat roof repair cost for commercial properties usually ranges from $500 to $3,000, depending on the roofing material (TPO, EPDM, PVC), the extent of the damage, and roof accessibility.

6. How much is the mobile home roof replacement cost compared to traditional homes?
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Mobile home roof replacement cost typically ranges from $3,000 to $8,000, making it generally more affordable than traditional home roof replacements, due to smaller size and simpler structure.

Service questions
1. Should I stay home during roof replacement?
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It's not necessary to stay home during roof replacement. Roofing work is noisy and can cause vibrations inside the house, which might be uncomfortable. Most homeowners choose to leave during major parts of the project, but our team ensures safety and keeps you updated, whether you're home or not.

2. How long does roof replacement take?
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The timeline for a roof replacement typically ranges from one to three days, depending on the size and complexity of the roof, weather conditions, and material type. Larger or more intricate roofs may take a bit longer, but we always aim for efficient, timely completion.

3. How to hire a roofing contractor?
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To hire a roofing contractor, start by researching local companies with good reviews and proper licensing. Request quotes from multiple contractors, verify their insurance and certifications, and ask for references. Always ensure you get a written contract that outlines the scope of work, timeline, and payment terms.

4. How to check if a roofing company is legit?
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Check if a roofing company is legit by verifying their business license, insurance, and local certifications. Look for memberships in professional associations, read customer reviews, and ask for recent project references. A legitimate company will be transparent and provide all documentation upon request.

5. How to choose a roofing company?
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When choosing a roofing company, consider their experience, customer reviews, warranty offerings, and quality of materials. Make sure they provide clear communication, detailed estimates, and a solid portfolio of completed projects. Local expertise is also a major advantage for understanding regional roofing needs.

6. How do you know if your roofing contractor is ripping you off?
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Warning signs that your roofing contractor might be ripping you off include vague contracts, pressure to pay large upfront deposits, lack of proper documentation, and unexplained price increases. Always ask for itemized estimates and written guarantees, and avoid contractors who avoid answering your questions directly.

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