Septic System Installation in Wisconsin

A new or replacement septic system starts with paperwork. Wisconsin requires a sanitary permit before installation, issued by the county in most places, and a certified soil tester evaluates the site before the system is designed. Plans are signed by a registered designer or a licensed master plumber.

The companies on this page say they install septic systems. Ask whether they handle the soil test and the permit or work with someone who does, which system types they install, and how long the permit is valid. Call Diggers Hotline at 811 at least three working days before any digging starts.

Top 60 of 80: new system installs

Top Tier LLC

4.8(139 reviews on Google)

E6280 Pine Rock Rd, Reedsburg

  • Works on septic systems
  • Septic inspections
  • Real estate inspections
(608) 495-0445

Dyer, Inc.

4.7(75 reviews on Google)

1025 W Fischer Lk Pkwy, Niagara

  • Works on septic systems
  • Tank pumping
  • Holding tanks
(715) 652-8912

Collins Sanitary LLC

4.6(71 reviews on Google)

W9235 Co Hwy B, Clinton · 19 mi from Janesville

  • Works on septic systems
  • Septic inspections
  • Real estate inspections
(608) 676-4432

Eckmayer Inc.

4.3(84 reviews on Google)

N8458 County Rd O, Waterloo · 31 mi from Janesville

  • Works on septic systems
  • Tank pumping
  • Holding tanks
(608) 837-5297

Schulteis Pumping LLC

4.8(40 reviews on Google)

151 James St, Slinger · 30 mi from Fond du Lac

  • Works on septic systems
  • Tank pumping
  • Holding tanks
(262) 644-5071

B & D Plumbing

4.6(43 reviews on Google)

144875 County Rd Nn, Wausau

  • Works on septic systems
  • Holding tanks
  • Septic inspections
(715) 848-9339

Schroeder Septic Systems

4.9(31 reviews on Google)

3051 Williams Grant Dr, De Pere · 14 mi from Green Bay

  • Works on septic systems
  • New system installs
  • Soil testing
(920) 621-8989

Bjoin limestone

4.4(35 reviews on Google)

7308W WI-11, Janesville

  • Works on septic systems
  • New system installs
  • Mound systems
(608) 876-6959

Bell Excavating, INC.

5.0(19 reviews on Google)

2094 WI-35, Somerset · 5 mi from New Richmond

  • Works on septic systems
  • Tank pumping
  • New system installs
(651) 439-6375

Meyer Plumbing LLC

4.5(16 reviews on Google)

159 Ruh Ct, Kiel · 12 mi from Chilton

  • Works on septic systems
  • Holding tanks
  • New system installs
(920) 894-8444

Geno's Septic Services

4.7(13 reviews on Google)

3678 County Rd E, South Range · 8 mi from Superior

  • Works on septic systems
  • Tank pumping
  • Holding tanks
(715) 398-6118

Thoma Water Works

5.0(10 reviews on Google)

N394 County Rd XX, Berlin · 20 mi from Oshkosh

  • Works on septic systems
  • Septic inspections
  • Real estate inspections
(920) 229-4527

Elite Plumbing Plus LLC

4.6(10 reviews on Google)

2961 16th Rd, Kronenwetter · 12 mi from Wausau

  • Works on septic systems
  • Septic inspections
  • New system installs
(715) 241-0288

superior septic systems

5.0(7 reviews on Google)

4295 S County Rd D, Poplar · 16 mi from Superior

  • Works on septic systems
  • Holding tanks
  • New system installs
(715) 292-2415

Egbert Excavating Inc

4.9(7 reviews on Google)

W1302 N Lawson Dr, Green Lake · 24 mi from Oshkosh

  • Works on septic systems
  • Holding tanks
  • New system installs
(920) 294-6668

Septic System Installation by city

The number of listed septic companies confirmed for new system installs on each city page.

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