Septic System Installation in Farmington, MI
Replacing a failed system or installing one for a new build in Farmington involves more than digging a hole for a tank. Soil testing, system design, permits and inspections all shape the final result.
A local installer can tell you which system types are likely to work on your lot and what the process looks like.
The steps of a new septic installation
Expect five stages: site and soil evaluation, system design, permit approval, construction, and inspection before the trenches are covered. Weather and permit review times affect the schedule more than the digging itself, which often takes only a few days once everything is approved.
Choosing the right system
The best system is the one your soil and lot can support. Good, deep soil often allows a conventional system. Clay, high groundwater or shallow bedrock may call for a mound, pressure distribution or an aerobic unit. Each has different costs and maintenance needs, so ask your installer to explain them.
Approvals you will need
Plan on a permit for any new or replacement system. Regulators typically want a site evaluation, a design that meets local code and an inspection before the system is covered. Your installer or designer often handles the paperwork, but the permit is tied to your property, so keep copies.
Why installation prices vary
Installation price depends on the system type the soil allows, the size of the house, the distance from the house to the field, how easy the site is to reach with equipment, and design and permit fees. Engineered systems such as mounds and aerobic units cost more to build and maintain.
Caring for a new septic system
Keep a copy of the design and as-built drawing, schedule your first pumping as recommended, and keep vehicles and structures off the tank and field. Plant only grass over the dispersal area and direct roof and yard runoff away from it. Systems with pumps or treatment units need regular service to stay under warranty.
Questions for a septic installer
Ask who will do the soil test and design, whether they pull the permit, and which system types they recommend for your lot and why. Ask how long the project will take, what warranty they give, and whether the quote includes restoring the yard. Ask for references from recent jobs near Farmington.
How long a new system takes near Farmington
Soil testing, design and permit review usually take longer than construction. In Oakland County, wet seasons and frozen ground can delay soil evaluations, and review times vary through the year. Once the permit is in hand, most installations take a few days to a couple of weeks.
Mistakes to avoid on a Farmington installation
The most expensive mistakes happen before the digging starts. Skipping the soil evaluation, choosing a system on price alone, or placing the drain field where future driveways, pools or additions will go all lead to trouble later. Undersizing the tank for the number of bedrooms is another common one. Ask your Farmington installer to walk you through the site plan and explain why each part sits where it does.
New septic systems in Oakland County
New and replacement systems in Oakland County go through the Oakland County health department, which reviews designs and inspects the work. Soil conditions change from one part of the county to another, so a design that suits a lot in Farmington may differ from one in Farmington Hills, Livonia, Franklin. A local installer knows those differences.
What Farmington's soil means for a new system
The USDA soil survey rates most mapped soils near Farmington as very limited for septic absorption fields. New systems here often need a mound, pressure distribution or another engineered design, which your soil test will confirm. Farmington averages about 33 inches of precipitation a year, which your designer will factor into where the system goes. About 3 months below freezing mean pipes and components must sit deep enough or be insulated, and installation is usually easiest outside winter.
Local conditions in Farmington that affect septic installation
Among the mapped soils within about two miles of central Farmington, the USDA soil survey rates 87% as very limited for septic absorption fields, 7% as somewhat limited and 6% as not limited. The most common drainage class is well drained. Soils like these often call for careful system design, such as a larger drain field, a mound or another engineered system, and a site evaluation before any new installation or replacement.
Farmington averages about 33 inches of precipitation a year, and May is usually the wettest month. Average temperatures stay below freezing for about 3 months a year, with January averaging 23°F, so tank lids and shallow lines benefit from a layer of snow or mulch rather than being cleared bare.
Sources: USDA NRCS Soil Survey (SSURGO), Soil Data Access; NASA POWER long-term climatology. Soil ratings describe mapped soil types near the city center and do not replace a site evaluation of your property.
What the soil around Farmington means for septic installation
By drainage class, the USDA soil survey maps the land around Farmington as 31% well drained, 24% somewhat poorly drained, 13% poorly drained, 13% moderately well drained, 10% very poorly drained, 8% excessively drained. With 47% of the soil poorly drained, a new or replacement field here is often larger or raised, and a soil test comes before any design.
Source: USDA NRCS Soil Survey (SSURGO), Soil Data Access
Septic companies near Farmington
These are the septic companies in our directory closest to Farmington, with straight-line distance. Call any of them directly, or send one request and we will pass it to the best match.
- B & F Septic Inc, Livonia, MI, 2.5 mi
- Gordon Lang Septic Systems Inc, Southfield, MI, 3.9 mi
- R & R Ventures Inc, Wixom, MI, 10.3 mi
- Al Pearson-Son Septic Tank Cleaning, Canton, MI, 11.6 mi
- Todoroff Brothers Septic Service, Waterford, MI, 13.2 mi
- Watkins Septic Tank Service, White Lake, MI, 13.2 mi
Septic Installation in nearby towns
We also cover septic installation in these towns near Farmington:
- Farmington Hills, 1.7 mi
- Livonia, 4.4 mi
- Franklin, 5.5 mi
- Novi, 5.7 mi
- Northville, 5.9 mi
- Southfield, 6.1 mi
About Farmington, MI
Farmington is in Oakland County, Michigan. About 11,391 people live there, across 2.7 square miles of land (about 4,278 per square mile).
Septic Installation questions in Farmington
- How long does septic installation take?
- Installation itself often takes a few days to two weeks. Soil testing, design and permit review can add several weeks, so plan ahead.
- How big does my septic tank need to be?
- Tank size is usually based on the number of bedrooms and local code. Your designer will size the tank and field for your home.
- Do I need a soil test for a new septic system?
- Yes, in nearly all cases. The soil evaluation decides what type of system and how large a field your lot can support.
- Who approves septic installations in Farmington?
- Septic permits are usually handled at the county or state level. Contact the Oakland County health department to confirm the requirements for your property.