How much does a new septic system cost for a 3 or 4 bedroom Conroe home?

A full conventional system usually runs $3,500 to $12,500 depending on the drainfield size your soil calls for. We give a firm written number after a free site evaluation, not a guess over the phone.

Do I need a perc test before installing a septic system?

Yes. Montgomery County requires a soil percolation test and site evaluation so the drainfield is sized correctly. The perc rate and the seasonal water table decide whether a conventional, aerobic, or mound system will pass.

How long does a full septic installation take?

Most conventional installs run two to three days on site once the permit is in hand, longer for aerobic or mound systems. We handle the permit, the dig, the set, and the final inspection so you do not chase paperwork.

How often should a septic tank be pumped?

The EPA suggests every 3 to 5 years for most households, sooner if you run a garbage disposal or a full house. Regular pumping is the cheapest way to protect the drainfield you paid for.

Which tank material should I choose, concrete, polyethylene, or fiberglass?

Concrete is the workhorse and the most common on Conroe lots, while polyethylene and fiberglass are lighter and will not rust. We walk you through the trade offs for your access, budget, and water table.

Can I read reviews or talk to past customers?

Absolutely. We keep references from recent installs around April Sound, Willis, and the 77304 area, and most of our new work still comes from a neighbor who pointed us your way.

Septic Tank Installation in Conroe, TX

Highly Rated Septic Installation for Conroe Homes

Name: Hobbesginsberg
Address: 1356 Old Montgomery Road, Conroe, TX, 77384, US
Telephone: (936) 361-8022

Permitted septic tank installation, drainfield work, and aerobic systems for Conroe and Montgomery County, built to pass inspection and earn the next referral. Free site evaluations across the area.

Call (936) 361-8022 Read Our Reviews

Trusted across Montgomery County
Permitted and inspected
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Customer Stories

Real reviews and homeowner experiences from families across Conroe and Montgomery County.

Septic system installation on a Conroe, TX lot

Questions Conroe Homeowners Ask Before a Septic Install

July 1, 2026

Almost every homeowner who calls us has found their way to the same handful of questions, usually after a neighbor recommended us. That is how septic work moves in Montgomery County. Someone off April Sound has a system put in, it drains fine for years, and they pass the number along. Here are the questions we hear most before a job on a Conroe lot, and the honest answers we give.

Do I Really Need a Perc Test?

Yes, and it is not just a formality. The soil percolation test measures how fast water drains, and Montgomery County uses it to size your drainfield. A slow perc rate or a high seasonal water table can mean a chamber system or an engineered mound instead of a conventional gravity field. Skipping this step is how people end up with a system that surfaces two winters later.

What Size Tank Will I Need?

Tanks are sized by bedroom count, not square footage. A 3 bedroom home usually takes a 1,000 to 1,250 gallon tank, and a 4 bedroom home steps up to 1,500 gallons. If you are adding a bathroom or a garbage disposal, tell us, because that changes the load on the system. We confirm the size before we order anything.

How Long Does the Job Take?

A conventional install is usually two to three days on site once the permit is in hand. Aerobic and mound systems take longer because of the pumps, the controls, and the extra fill. We handle the permit, the dig, the tank set, and the final county inspection, so you are not the one chasing paperwork. If you want the full breakdown, our new septic system installation page walks through each step.

What Do the Reviews Actually Mean?

A five star review on a septic job is not about a friendly crew. It means the system still works. We build the buried parts, the baffles, the distribution box, the drainfield trenches, to the same standard as the visible ones, because those are what decide whether the homeowner is happy in year ten. That is the whole reputation, and it is why most of our work still comes by word of mouth off roads like Metcalf Street.

How Do I Get Started?

The first step is a free site evaluation. We walk your lot, review the perc results, and hand you a clear written estimate with no pressure. When you are ready, contact us and we will get you on the schedule.

Thinking about a new system or a tank replacement in Conroe? Call Hobbesginsberg at (936) 361-8022 for a free site evaluation.

Read the full article

Reviews you can actually readOur customers post honest write ups, and we are glad to share references from recent Conroe and Montgomery County installs.
A track record that holds upYears of permitted installs across April Sound and Willis, with an as built record kept on every system we set.
Our satisfaction guaranteeWe stand behind the tank, the D-box, and the drainfield, and we come back to make a punch list right at no charge.
Permitted and inspectedEvery job is pulled through the county health department and passes inspection before we backfill and grade the yard.

Hobbesginsberg provides septic tank installation in Conroe, TX, and the steady stream of reviews we earn comes from doing every step right. Our crews handle new septic system installation, drainfield and leach field construction, aerobic treatment unit (ATU) systems, perc testing and site evaluation, septic tank replacement, and routine pumping. Homeowners near Grand Central Park, off League Line Road, and along the 77384 corridor call us because word travels fast in Montgomery County, and a good name is the only advertising that lasts out here.

Most of our work arrives by referral. A neighbor watches us set a 1,000 gallon concrete tank, backfill clean, and leave the yard graded, then passes our number to the next family who needs one. Those conversations, repeated across April Sound and River Plantation for years, are the real reason our schedule stays full. We would rather earn the next job than chase it, so we treat every install like the review has not been written yet.

Reputation on a septic job is not about a slogan. It is about pulling the county health department permit, passing the inspection, and building a system that still drains fine a decade later. We size tanks by bedroom count, set the distribution box level so every drainfield lateral gets its fair share of effluent, and photograph the as built layout before the last load of fill drops on a Wilson Road lot or anywhere else we work.

When people ask why our five star reviews hold up, the honest answer is that we treat the buried parts the way we treat the visible ones. A crushed inlet baffle or a starved trench does not show from the driveway, but it shows in a failed system two winters later. We build so the homeowner never has to write that review, and that quiet standard has carried our name across Conroe since our first install off North Frazier Street.

Questions Our Customers Often Ask

How much does a new septic system cost for a 3 or 4 bedroom Conroe home?: A full conventional system usually runs $3,500 to $12,500 depending on the drainfield size your soil calls for. We give a firm written number after a free site evaluation, not a guess over the phone.
What size septic tank do I need?: Tanks are sized by bedroom count. A 3 bedroom home typically takes a 1,000 to 1,250 gallon tank, and a 4 bedroom home steps up to 1,500 gallons. We confirm the size against your fixture count before we order.
Do I need a perc test before installing a septic system?: Yes. Montgomery County requires a soil percolation test and site evaluation so the drainfield is sized correctly. The perc rate and the seasonal water table decide whether a conventional, aerobic, or mound system will pass.
How long does a full septic installation take?: Most conventional installs run two to three days on site once the permit is in hand, longer for aerobic or mound systems. We handle the permit, the dig, the set, and the final inspection so you do not chase paperwork.
How often should a septic tank be pumped?: The EPA suggests every 3 to 5 years for most households, sooner if you run a garbage disposal or a full house. Regular pumping is the cheapest way to protect the drainfield you paid for.
Which tank material should I choose, concrete, polyethylene, or fiberglass?: Concrete is the workhorse and the most common on Conroe lots, while polyethylene and fiberglass are lighter and will not rust. We walk you through the trade offs for your access, budget, and water table.
Can I read reviews or talk to past customers?: Absolutely. We keep references from recent installs around April Sound, Willis, and the 77304 area, and most of our new work still comes from a neighbor who pointed us your way.

The Septic Work Neighbors Recommend

One local crew for the full onsite wastewater system, from the first perc test to the final county inspection.

01New Septic System Installation: Complete onsite wastewater systems with tank, distribution box, and drainfield, sized from your bedroom count (a 3 bedroom home usually calls for a 1,000 to 1,250 gallon tank).
02Septic Tank Replacement: Removal of a cracked or failed tank and a set of new watertight concrete, polyethylene, or fiberglass, most often a 1,000 to 1,500 gallon unit matched to the household.
03Drainfield and Leach Field Installation: Gravel trench or plastic chamber soil absorption fields, sized from the perc rate so treated effluent disperses instead of surfacing or backing up.
04Aerobic Treatment Unit (ATU) Systems: Oxygen fed units certified to NSF/ANSI Standard 40, a strong fit for small lots or tight soils where a conventional gravity drainfield will not pass.
05Perc Test and Site Evaluation: Soil percolation testing that measures how fast water drains, confirms the seasonal water table, and sets the drainfield size the county will permit.
06Pumping and Inspection: Routine pump outs on the EPA guided 3 to 5 year interval, plus point of sale inspections that check baffles, effluent filter, and sludge depth before a closing.

The Communities That Recommend Us

Our reputation reaches across Conroe and the surrounding Montgomery County towns, from the lakeside neighborhoods to the rural lots where a reliable septic system matters most.

Conroe, TX (77301, 77304, 77384)
Willis, TX
Montgomery, TX
The Woodlands, TX
Oak Ridge North, TX
Shenandoah, TX
Splendora, TX
Porter, TX

Not sure we reach your road? Call (936) 361-8022 and we will tell you straight.

What a Well Reviewed Install Costs

Septic pricing follows the tank, the soil, and the size of the drainfield your perc test calls for. A straight tank swap sits at the low end, a full conventional system lands in the middle, and an aerobic or engineered mound build runs higher because of the pumps and the required maintenance. The ranges below are typical for the Conroe area, and we put the firm number in writing after a free site evaluation off Longmire Road or wherever your lot sits.

Septic Tank Replacement$3,500 to $8,500 installed	Full Conventional System$3,500 to $12,500 installed	Aerobic or Mound System$10,000 to $20,000 installed
New 1,000 to 1,500 gallon tank Old tank pumped and removed Get estimate	Tank, D-box, and drainfield Permitted and inspected Get estimate	NSF/ANSI 40 treatment Built for tight soils Get estimate

Join Our List of Happy Homeowners

Ready to put a septic system in the ground and stop thinking about it? Call for a free site evaluation, and we will walk your lot, talk through the perc results, and hand you a clear written estimate with no pressure. Most Conroe families find us the same way you did, through a neighbor off Metcalf Street who was glad they made the call.

Call (936) 361-8022