New Construction Plumbers in Issaquah, WA
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Service Pros
Full House Remodeling, Roofing, Painting , and 2 more
"Fantastic experience! The crew was punctual, respectful, and did an amazing job."
CFF3106E57194E7672EC1645803B85EE2789B8AC3E67CD5C1F2CE7FC9D107333 6. in July 2026
New construction/remodel, Master plumber, Leak detection and repair , and 12 more
"Mark was great. Very knowledgeable and willing to endure my persistent questions. Installation was quick no mess and works perfectly."
5F5CC5DD3CF310B664FB5EE4DBE9569B243A00F95907186CB8D12828906D4C14 0. in December 2025
"Very talented with a remarkable skill set to remodel kitchen and bathrooms."
Spencer P. in July 2024
In business since 2019
About us: "Knockout Plumbing & Mechanical LLC is a local Seattle based company. Knockout strives to leave their clients with peace of mind when each job is said and done. From hydro jetting and sewer repair to remodels/new construction we knock it out. We look forward to hearing from you, so please never hesitate to reach out."
About us: "Cahill's Plumbing & Heating has served the greater Maple Valley, WA area for more than 30 years and is setting new industry standards for plumbing. Our company provides every new and existing client honesty, value and high quality services. Our staff of experienced plumbers and heating contractors works hard to surpass your expectations with both materials and labor. We don't use the "flat-rate" gimmick, but provide prompt, honest service. All work is done by knowledgeable plumbers who are trained to use the best tools available. Our plumbing and heating services include: • All plumbing repairs • Grease trap repair and installation • 24-hour service • Hot water tank and boiler sales • Compressed air piping • Drain cleaning and repair At Cahill's Plumbing & Heating, we use American Standard, Moen, Kohler, Delta and Grohe to complete plumbing repairs and installations. You can depend on us to complete all projects efficiently and on time. We are licensed and insured, and your satisfaction is guaranteed. Call Cahill's Plumbing & Heating today for your next service call and see how we're setting the industry standard for honesty, value and service!"
In business since 2017
About us: "2 Sons Plumbing is a full-service plumbing and sewer company serving the greater Seattle area. Known for reliable service, honest recommendations, and quality workmanship, our team handles everything from everyday plumbing repairs to complex sewer solutionshelping homeowners keep their systems running smoothly year-round."
"They quickly identified the issue and ended up identifying a second related problem that they also resolved within days."
B46697F5E8BF2EFB6AC2AF9BC2F98CBE65282C70184C702BF4F9A7CC582CDBD0 6. in April 2026
Professional plumbing services including leak detection, drain cleaning, water heater installation, sewer repairs, fixture replacements, and whole-home repiping solutions., Reliable heating system repair, furnace installation, heat pump services, and preventative maintenance designed to keep Seattle homes comfortable year-round., High-efficiency air conditioning installation, AC repair, ductless mini-split systems, and indoor comfort solutions tailored to your home’s needs. , and 2 more
"Did a great job. The project was done in 30 mins."
7F7EF05D5154E4D309AD8DCB6C54589C51AA9ADC54729F2A7DAC1F889E5C2C7F F. in December 2025
Heat Pump Installation., Ductless Mini-Split Installation. Heating & Furnace Installation. Duct Sealing., Geothermal heat pumps. Thermostats. Electrical panels. Fuse box upgrades. Indoor & outdoor lighting. Circuit. Switches. Air duct cleaning. Humidifiers. Energy audits. Water heater. Panel Upgrades. , and 7 more
"The technician's were well trained and did a very professional job. Highly recommend"
0421AC277AA224D073284DCA5F5AA8D536C7A02E6ECF195708CB3D7ECA7F33BF 0. in December 2025
Related Projects in Issaquah, WA
HomeAdvisor Community Rating
Issaquah Plumbers are rated 4.3 out of 5 based on 336 reviews of 336 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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Things to Consider Before You Rough In Plumbing For An Addition or New Construction:
What type of plumbing project do you want?
What plumbing fixtures do you want installed?
- Toilet
- Sink
- None (rough-in)
- Other
Describe the wall access.
Do you provide these professional services?
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