How long does a full septic installation take from permit to backfill?

Once the perc test is done and the county permit is issued, the physical install is usually a two to five day job for a conventional system. The longer part of the timeline is the permit review at the Montgomery County health department, which can add a couple of weeks. We give you the realistic dates up front so you can plan around the crew being on site.

What size septic tank do I need for my home?

Tank size is set by bedroom count, not square footage. A three bedroom home typically calls for a 1,000 to 1,250 gallon tank, and a four bedroom home moves up to 1,500 gallons. We confirm the sizing during the site evaluation and match it to the drainfield your soil can support.

What is a perc test and why do I need one first?

A soil percolation test measures how fast water drains through your ground and confirms the seasonal high water table. It is the first step because it decides whether you can use a conventional gravity drainfield or need an aerobic or mound system, and the county will not issue a permit without it.

Concrete, polyethylene, or fiberglass tank, which is right for my lot?

Concrete is heavy and durable and resists floating in wet ground, which matters on some Conroe lots. Polyethylene and fiberglass are lighter, seamless, and rust free, and they can be a better fit where access is tight or the water table is high. We recommend the tank that suits your soil after the evaluation.

Do I need a conventional, aerobic, or mound system?

It depends on your perc rate and water table. Good draining soil with room for trenches supports a conventional gravity system, the least expensive option. Tight clay, a high water table, or a small lot often calls for an aerobic treatment unit or an engineered mound so the required separation to groundwater is met.

What permits and inspections does a septic install require?

Onsite systems in Conroe are permitted through the Montgomery County health department. We prepare the application, meet the setback rules from your well and property lines, and schedule the inspection of the open system before we backfill. Pulling the permit and passing that inspection are both included in our scope.

How far does the tank and drainfield have to be from my well?

Standard setbacks put the tank at least 50 feet from a private well and the drainfield at least 100 feet, along with four feet of vertical separation to the seasonal high water table or bedrock. We lay out the system during the site evaluation so every distance is met before the permit is filed.

How often should the system be pumped after it is in?

The EPA guidance is a pump out roughly every three to five years, depending on tank size and how much water your household uses. Because we set a gasketed riser and access lid at grade, future pumping and inspection never mean digging up your yard to find the lid.

Septic Tank Installation in Conroe, TX

New Septic Systems for Conroe Homes and Acreage

Name: Braunmedicalmedia
Address: 7616 Gladstell Street, Conroe, TX, 77306, US
Telephone: (936) 675-6933

Full onsite wastewater systems installed watertight, from perc test to final backfill. We pull the Montgomery County permits and handle the inspections across the Conroe area.

Call (936) 675-6933 Book a Site Evaluation

Licensed and insured
County permits handled
Free site evaluations

The Timeline Blog

A week by week guide to what happens during a septic installation, from permit to backfill.

Septic installation timeline in Conroe, TX

Your Septic Installation Timeline, Week by Week

July 1, 2026

Putting in a new septic system feels like a big unknown until you see it as a sequence of steps. Most Conroe installs follow the same order, and knowing the order lets you plan your time and your budget. Here is how a typical project unfolds from the first call to the final grade.

Week One: Perc Test and Site Evaluation

Everything starts with the soil. We run a percolation test to measure how fast water drains through your ground and to confirm the seasonal high water table. This one test decides whether you can use a conventional gravity drainfield or need an aerobic unit or a mound. It also sets the size of the field. Nothing else can be finalized until we know what your soil will accept.

Week Two to Three: The County Permit

With the perc results in hand, we prepare the application for the Montgomery County health department. This step is mostly waiting on review, so it is the part of the timeline you cannot rush. We lay out the setbacks from your well and property lines on the plan, file it, and keep you posted on the approval. Planning around this window is the single best way to avoid frustration.

Week Three to Four: Excavation and Tank Set

Once the permit clears, the crew arrives. We excavate for the tank and trenches, set the tank level on a compacted base, and run the Schedule 40 PVC to the distribution box. If you are replacing an old tank rather than starting fresh, our septic tank replacement service handles the removal and reconnection in the same window.

Week Four: Drainfield and Inspection

Next comes the field. We build the gravel trenches or set the chamber system sized to your perc rate, then call the county for the inspection of the open system. Our drainfield installation work is built to the permitted design so it passes the first time. The inspector has to see the field before anything gets covered.

Week Four to Five: Backfill and Restore

After the system passes, we backfill, set a gasketed riser and lid at grade so future pumping never means digging up the lawn, and restore the grade so water sheds away from the tank. We hand you the as built record and the maintenance schedule. From there, a pump out every three to five years is all the system needs.

The whole run from perc test to backfill often lands in a month, with the permit review being the variable. Want your project on the calendar? Call Braunmedicalmedia at (936) 675-6933 or contact us for a free site evaluation in Conroe.

Read the full article

The Conroe Region We Serve

We install and service septic systems throughout Conroe and the surrounding Montgomery County communities, from the subdivisions in town to the acreage lots out past the city limits. If your property sits on well and septic, we can reach you.

Conroe, TX (77301, 77304, 77306)
Willis, TX
Montgomery, TX
Panorama Village, TX
Cut and Shoot, TX
Oak Ridge North, TX
The Woodlands, TX

Not sure if we reach your lot? Call (936) 675-6933 and we will confirm before we schedule the perc test.

Braunmedicalmedia provides septic tank installation in Conroe, TX, and manages every part of an onsite wastewater treatment system from the first shovel to the final backfill. Our crews handle drainfield construction, aerobic treatment unit setups, perc testing and site evaluation, distribution box repair, septic tank replacement, and mound systems for lots that will not pass a conventional gravity design. Whether your home ties into a 1,000 gallon concrete tank or a 1,500 gallon unit sized for four bedrooms, we set it watertight and to the code that governs Montgomery County. Most of our recent work runs along Longmire Road, League Line Road, and the newer acreage off Old Montgomery Road.

A septic project is really a sequence of steps, and knowing what happens in each one takes the mystery out of the work. It starts with a soil percolation test that tells us how fast water moves through your ground, moves to a permit application at the county health department, then to excavation, tank set, drainfield trenching, inspection, and cover. We walk you through that order at the first visit so you are never guessing what comes next or when the crew will be back on West Davis Street or wherever your lot sits.

Communication is the part homeowners tell us they remember. We give you one point of contact, a written scope, and a plain schedule that lines up the perc test, the permit, and the install dates. When the county inspector needs to see an open trench before we backfill, we tell you the day it is happening. That habit keeps a two week job on track and keeps you from taking time off work for a visit that was never going to happen. It is a small thing that separates a smooth install from a frustrating one.

The materials under your yard decide how long the system lasts, so we do not cut corners there. We set concrete, polyethylene, or fiberglass tanks depending on your soil and water table, run Schedule 40 PVC to the distribution box, and build the drainfield with washed gravel or plastic leaching chambers and non woven geotextile fabric. A gasketed riser brings the access lid to grade so future pumping never means digging up the lawn. Every part meets the standard the inspector checks, and we photograph the build before the 77306 site gets covered.

You get the full timelineA written week by week schedule from perc test to backfill, so you always know the next step.
We handle the permitsMontgomery County health department application, setbacks, and inspections are on us, not you.
Built with the right materialsConcrete, poly, or fiberglass tanks and proper drainfield media matched to your soil.
One person answersA single point of contact for the whole job, and a real person picks up when you call.

The Stages of a Septic Build

One local crew for every phase of the system, from the first soil test to the day the inspector signs off. Here is what we install and repair around Conroe.

01New Septic System Installation: A complete onsite system sized from your bedroom count, including the tank, distribution box, and drainfield. A three bedroom home usually calls for a 1,000 to 1,250 gallon tank set on a compacted base.
02Septic Tank Replacement: We pull a failed or cracked tank and set a new watertight concrete, polyethylene, or fiberglass unit, most often a 1,000 to 1,500 gallon tank matched to your household size and reconnected to the existing field.
03Drainfield and Leach Field Installation: The soil absorption area built with gravel trenches or plastic chamber systems, sized from your perc rate so treated effluent disperses instead of surfacing or backing up into the yard.
04Aerobic Treatment Unit Installation: An oxygen fed advanced unit certified to NSF/ANSI Standard 40, a strong fit for the smaller lots and tight clay soils around Conroe 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 Montgomery County health department will permit before any digging starts.
06Distribution Box Repair: Repair or replacement of the D-box that splits effluent evenly among the drainfield laterals, correcting the settling or clogging that overloads one trench and starves the rest.

Costs at Each Phase of the Project

Septic pricing follows the phases of the job. The perc test and site evaluation come first and set the design. A full conventional system for a typical home lands in the middle, and an aerobic unit for a difficult lot runs higher because of the aerator, pumps, and required maintenance contract. Soil, water table, and drainfield size drive the spread. We put the firm number in writing after the site evaluation, with no surprises once the crew is on Wilson Road or your street.

Perc Test and Site Evaluation$750 to $1,900	Full Conventional System$3,500 to $12,500	Aerobic Treatment Unit$10,000 to $20,000
Confirms your soil and water table Sets the permitted drainfield size Book evaluation	Tank, D-box, and gravity drainfield Sized for a 3 to 4 bedroom home Get estimate	NSF/ANSI Standard 40 certified For tight soils and small lots Get estimate

What Homeowners Ask Before Starting

How long does a full septic installation take from permit to backfill?: Once the perc test is done and the county permit is issued, the physical install is usually a two to five day job for a conventional system. The longer part of the timeline is the permit review at the Montgomery County health department, which can add a couple of weeks. We give you the realistic dates up front so you can plan around the crew being on site.
What size septic tank do I need for my home?: Tank size is set by bedroom count, not square footage. A three bedroom home typically calls for a 1,000 to 1,250 gallon tank, and a four bedroom home moves up to 1,500 gallons. We confirm the sizing during the site evaluation and match it to the drainfield your soil can support.
What is a perc test and why do I need one first?: A soil percolation test measures how fast water drains through your ground and confirms the seasonal high water table. It is the first step because it decides whether you can use a conventional gravity drainfield or need an aerobic or mound system, and the county will not issue a permit without it.
Concrete, polyethylene, or fiberglass tank, which is right for my lot?: Concrete is heavy and durable and resists floating in wet ground, which matters on some Conroe lots. Polyethylene and fiberglass are lighter, seamless, and rust free, and they can be a better fit where access is tight or the water table is high. We recommend the tank that suits your soil after the evaluation.
Do I need a conventional, aerobic, or mound system?: It depends on your perc rate and water table. Good draining soil with room for trenches supports a conventional gravity system, the least expensive option. Tight clay, a high water table, or a small lot often calls for an aerobic treatment unit or an engineered mound so the required separation to groundwater is met.
What permits and inspections does a septic install require?: Onsite systems in Conroe are permitted through the Montgomery County health department. We prepare the application, meet the setback rules from your well and property lines, and schedule the inspection of the open system before we backfill. Pulling the permit and passing that inspection are both included in our scope.
How far does the tank and drainfield have to be from my well?: Standard setbacks put the tank at least 50 feet from a private well and the drainfield at least 100 feet, along with four feet of vertical separation to the seasonal high water table or bedrock. We lay out the system during the site evaluation so every distance is met before the permit is filed.
How often should the system be pumped after it is in?: The EPA guidance is a pump out roughly every three to five years, depending on tank size and how much water your household uses. Because we set a gasketed riser and access lid at grade, future pumping and inspection never mean digging up your yard to find the lid.

Reserve Your Installation Date

Ready to get your septic project on the calendar? We will come out, run the perc test, evaluate your site, and hand you a written scope and schedule that lays out every phase from the county permit to the final backfill. There is no pressure and no charge to talk it through. Most Conroe installs move quickly once the permit clears, and we keep you posted at each step so you always know when the crew is coming back.

Call (936) 675-6933