New Sewer & Water Main Installation SE Michigan

New Construction & From-Scratch Utility Installs

Complete New Sewer & Water Main Installation in Southeast Michigan

Mansour’s Innovations installs brand-new underground utilities, not just repairs to existing ones. If a property has never had a sanitary sewer lateral or a municipal water service, or if you are adding a structure that needs its own, this is the work: a new tap into the city main, a new full-depth run to the building, a permitted inspection, and a properly bedded and compacted trench that will not settle two winters from now.

We serve builders, developers, and homeowners across Oakland County, Macomb County, Wayne County, and the rest of Metro Detroit. Because we own and operate our own excavators, we control the schedule and the quality of the dig instead of waiting on a rented machine and an outside operator. That matters most on new construction, where the underground utilities have to land between the foundation pour and the backfill, and on deep sanitary laterals where grade and bedding decide whether the line runs clean for fifty years.

Sewer and water go in together, in one trench, with one contractor responsible for both. Already have a line in the ground that is failing? That is different work — see our sewer repair and replacement page for cracked, collapsed, or root-invaded laterals, our water main and service line replacement page for lead, galvanized, or leaking water services, and our excavation page for the heavy digging behind all of it.

What We Install

New Sanitary Sewer Laterals

Complete new sewer line installation from the building drain out to the municipal sanitary main, laid to a continuous fall in PVC SDR-35 or whatever material your community specifies, with cleanouts set where code requires them.

New Water Services From the City Main

New water service installation from the corporation stop at the municipal main all the way to the meter setting inside the building, in Type K copper or municipality-approved HDPE, sized to the building’s demand.

Sewer Taps & Saddle Connections

Cutting in a new sewer tap on the city main – wye, tee, or saddle depending on the main’s material and the community’s standard detail – coordinated and inspected with the authority that owns the sewer.

Water Taps, Curb Stops & Meter Connections

Corporation stop, curb stop, and buffalo box set at the right depth and location for your municipality, plus exterior meter pits where the community requires the meter outside rather than in the basement.

Septic-to-Sewer Conversions

New sanitary lateral to the city main, re-plumbing of the building drain, and proper abandonment of the old septic tank and drain field to satisfy the county health department.

Combined Trench Utility Installs

Water and sewer hookups installed together in one trench on new builds, additions, and ADUs, sequenced with the builder’s foundation, backfill, and grading schedule so the underground work never holds up the site.

Our Sewer & Water Installation Work

Full-depth excavation, bedding, and new utility connections across Metro Detroit

View Our Work Gallery

Our Installation Process

Site Evaluation & Route Planning

We walk the property, confirm where the municipal main runs and how deep it sits, and plan the route so the sewer lateral holds a continuous fall and the water service avoids driveways, mature trees, and other utilities wherever possible.

Permits, MISS DIG 811 & Municipal Coordination

We pull the permits with your city, township, or county authority, file the MISS DIG 811 ticket so every existing utility is located and marked, and schedule the tap and inspections with the department that owns the main.

Excavation Below the 42-Inch Frost Line

We open the trench with our own excavators and hand-dig around marked utilities. Water services go below the Michigan frost line – generally a minimum of 42 inches of cover, more where a community requires it – and sanitary laterals go as deep as the fall to the main demands, with shoring and spoil management on deep runs.

Tap & Connection at the Main

The new tap is cut into the municipal main to the community’s standard detail – corporation stop and curb stop on the water side, wye or saddle on the sewer side – coordinated with the water department’s crew where they perform the live tap themselves.

Bedding, Backfill & Compaction

Pipe is laid on a bedded sand or stone base rather than dropped on raw clay, sewer laterals are set to a continuous fall and checked with a laser or level, and the trench is backfilled in compacted lifts so it does not sink after the first freeze-thaw cycle.

Inspection, Testing & Restoration

The municipal inspector signs off on the open trench before we cover it, the water service is pressure tested, and we finish with grading, topsoil, and restoration of drives, walks, or lawn plus the final paperwork that puts the connection on record.

Why Choose Mansour’s for a New Installation?

We Own Our Excavation Equipment

Our excavators are ours, so the dig is scheduled around your build instead of around a rental yard, and the quality of the trench is on us.

Licensed & Insured

Fully licensed and insured for underground utility work, which is what most Michigan communities require before they will issue the tap permit.

Both Utilities, One Contractor

Sewer and water installed together in a single trench by one crew – one schedule, one restoration, no finger-pointing between trades.

Permit & Inspection Experience

We work with Oakland, Macomb, and Wayne County authorities regularly and handle the permits, MISS DIG locates, and inspection sign-offs for you.

New Installation vs. Replacement

New installation runs a line where none exists. Replacement swaps out a line that is already in the ground. Here is how to tell which job you actually have.

You Need a New Installation If…

You are building on a new or undeveloped lot with no sewer lateral or water service at all
You are adding an addition, detached garage, ADU, or in-law suite that needs its own service
Your community has extended sanitary sewer to your street and you are converting off septic
You are moving off a private well onto municipal water and need a service run from the main
The property has never been connected to municipal water or sewer
A builder needs both utilities stubbed in and inspected before backfill

You Probably Need Something Else If…

Your existing sewer lateral is cracked, collapsed, root-invaded, or backing up – that is our sewer repair and replacement service
Your existing water line is lead, galvanized, or leaking – that is our water main and service line replacement service
Tap and connection fees are charged by your municipality, not by us, and they vary widely from one community to the next
Permit review and tap approval can add days or weeks to the schedule before any digging starts
Road, sidewalk, or driveway restoration may be scheduled separately by the city after the trench settles

Not Sure Which One You Need?

We will come out, look at what is actually in the ground, confirm depths and tap locations with your municipality, and give you an itemized written estimate. No charge for the assessment.

Call (586) 345-7292

Frequently Asked Questions

There is no flat rate, because almost every cost driver is site specific. Most residential new installations in Southeast Michigan land somewhere between $5,000 and $15,000 once permits, tap fees, and restoration are counted, but treat that as a range rather than a quote. The biggest factors are the run length from the city main to the building, the depth of the municipal main (deep sanitary mains mean a deeper, wider, shored trench), whether the route crosses a driveway, sidewalk, or road that has to be cut and restored, the pipe material and diameter your municipality specifies, the tap and permit fees charged by your city or township, and soil conditions such as the heavy clay and high water table common across Macomb and Wayne County. We walk the site, confirm depths with the municipality, and give you an itemized written estimate before anything is scheduled.

Yes. Every new sanitary sewer lateral and every new water service tap in Southeast Michigan requires a permit, and the permit is pulled through the city, township, or county authority that owns the main – for example the local building department plus the Oakland County Water Resources Commissioner, the Macomb County Public Works Office, or the Detroit Water and Sewerage Department depending on where you are. Most communities also require a licensed and bonded contractor on file before they will issue the permit, a MISS DIG 811 utility locate before excavation, and an inspection of the open trench before it is backfilled. We handle the permit applications, the locate ticket, and the inspection scheduling as part of the job.

Water service lines have to sit below the frost line. In Southeast Michigan that generally means a minimum cover of about 42 inches, and many communities require more – some specify 5 feet. Sanitary sewer laterals are usually deeper still, because the lateral has to reach the city main at a depth that keeps a continuous downhill fall from the building drain, commonly 6 to 12 feet at the street. Depth is not negotiable: a water line installed shallow will freeze and split in a hard Michigan winter, and a sewer lateral set too high or with a flat spot will hold solids and back up.

The excavation and pipe work on a typical residential job is one to three days once we are on site. The longer part of the timeline is usually before we dig: permit review and tap approval at the municipality can take anywhere from a few days to a few weeks depending on the community and the season, and the MISS DIG locate has a required waiting period. New construction packages that include both the sewer lateral and the water service typically run longer than a single-utility job, and road or sidewalk restoration is often scheduled separately by the city after the trench has settled.

A tap fee – sometimes called a connection charge or capital charge – is what the municipality bills you for the right to connect a new service to its water or sanitary sewer system. It is separate from our labor and materials, it is set by the community rather than by us, and it can vary widely from one city to the next. Some communities also charge a separate meter fee and require that their own crew make the live tap on the water main while we handle everything from the corporation stop to the building. We coordinate the scheduling, inspections, and required paperwork with the water department so you are not chasing it, and we tell you up front which charges will come from the city rather than from us.

Open trenching is the right call for most new sanitary sewer laterals, because a gravity sewer has to be laid to a precise, continuous grade on a properly bedded trench bottom, and that is far easier to verify and control in an open trench. Directional boring makes more sense for a pressurized water service that has to pass under a mature tree, a finished driveway, or a road the city does not want cut. In practice many jobs use both: we bore the section under the hard surface and open-cut the rest. We recommend the method based on the route, the depth, and what your municipality allows, not on which one is easiest for us.

Yes. A septic-to-sewer conversion means installing a new sanitary sewer lateral from the house to the city main, re-plumbing the building drain to the new lateral, and then properly abandoning the septic tank and field. Abandonment is a regulated step in Michigan, not just a matter of forgetting about the tank – the tank has to be pumped by a licensed hauler, then crushed or filled and the opening sealed, and the county health department typically inspects it. Conversions are common when a community extends sewer to a street or when a failing field forces the issue, and many communities require the connection within a set time once sewer is available at the property line.

Yes. We install complete underground utility packages for new builds, additions, detached garages, and accessory dwelling units – the new water service from the city main to the meter setting and the new sanitary sewer lateral from the building drain to the tap. Because we own our excavators, we can sequence the underground work around the builder’s foundation and backfill schedule rather than waiting on a subcontracted machine, which is usually where new construction utility work stalls.

New Sewer & Water Main Installation