Can I see a septic system you installed near me?

Yes. We keep dated photos of the tank, distribution box, and open trenches from our Conroe area jobs, and we are glad to point you to a finished system in your part of Montgomery County. Call (936) 307-9861 and we will find one close by.

What size septic tank does my home need?

Tank size follows bedroom count. A three bedroom Conroe home usually calls for a 1,000 to 1,250 gallon tank, and a four bedroom home steps up to 1,500 gallons. We confirm the size against the county sizing rules before we order anything.

Do I need a perc test before installation?

Almost always. A soil percolation test measures how fast water drains and confirms the seasonal water table, and Montgomery County uses that result to set your drainfield size. Every conventional system in our portfolio started with one.

How long does a full septic install take?

Once the permit clears, a straightforward Conroe lot takes a few days of actual dig time from excavation to backfill. Heavy clay soil, a mound design, or an aerobic unit can add time, and we tell you the honest schedule up front.

Concrete, polyethylene, or fiberglass tank?

Concrete is the workhorse and the most common tank we set. Polyethylene and fiberglass weigh less and resist corrosion, which helps on some sites. We match the tank to your soil, your budget, and the access to the yard.

Are you licensed and insured?

Yes. We are a licensed and insured local installer, we pull the Montgomery County permit on every job, and we schedule the health department inspection before backfill. You get the as built record when the system is finished.

Septic Tank Installation in Conroe, TX

Proven Septic Installation Work in Conroe, TX

Name: Mavia
Address: 9299 North Main Street, Conroe, TX, 77306, US
Telephone: (936) 307-9861

New systems, tank replacements, and drainfields installed across Conroe and Montgomery County. We would rather show you finished projects than make promises, so ask to see the work near you.

Call (936) 307-9861 See Our Project Photos

County permitted installs
Perc test to backfill
Photos of every job

Project Diary

A running record of recent Conroe installs, with details and results from each completed project.

Project Diary: A Full System Install in Graystone Hills

July 1, 2026

Completed septic system install on a Conroe lot

Every job earns its own page in the diary. This one was a full conventional system for a four bedroom home in the Graystone Hills area of Conroe, replacing a system that had started surfacing in the back yard. Here is how the project actually unfolded, step by step.

The Perc Test Set the Plan

We started, as always, with a soil percolation test and a profile hole. The soil here drained slower than the owner expected, closer to a tight clay loam, which meant the drainfield needed more length than a sandy lot would. That single result shaped the entire design, and it is why we never quote a field before the soil tells us what it can handle. If you want the reasoning behind field sizing, our Drainfield Installation page walks through it.

Sizing the Tank and Pulling the Permit

Four bedrooms put this home in the 1,500 gallon tank bracket under the county sizing rules. We drew the system, submitted for the Montgomery County permit, and waited for approval before touching a shovel. Skipping the permit is how installers get systems dug up and redone, so we treat that approval as the real start date.

Excavation and Setting the Tank

With the permit in hand, the dig went quickly. We excavated the tank hole and the drainfield trenches in a single day, set the 1,500 gallon concrete tank dead level on a prepared base, and plumbed the Schedule 40 PVC inlet and outlet. The distribution box went in next, leveled carefully so every lateral would get an equal share of flow.

Laying the Field and Passing Inspection

We ran perforated pipe through the chamber trenches, wrapped in filter fabric to keep soil out of the system. Then came the part that matters most: the county inspector looked at the open tank, box, and trenches before a single scoop of backfill went back. It passed clean. We photographed everything, backfilled, and graded the yard to shed water away from the field.

The Result

The homeowner got a documented, permitted system and an as built drawing for their records. No more surfacing, no more worry at resale. That is the whole point of keeping this diary: the work is easier to trust when you can see how it went in.

Thinking about a new system or a failing field of your own? Contact us or call Mavia at (936) 307-9861 for a site evaluation in Conroe.

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The Components We Install

Every completed system in our portfolio is built from the same proven parts, sized and set to the soil and the household.

01New Septic System Installation: A full onsite system with tank, distribution box, and drainfield, sized from bedroom count. Most three bedroom Conroe homes take a 1,000 to 1,250 gallon tank.
02Septic Tank Replacement: We remove a cracked or failed tank and set a new watertight concrete, polyethylene, or fiberglass unit, usually a 1,000 to 1,500 gallon size matched to the home.
03Drainfield and Leach Field: Gravel trench or plastic chamber absorption fields, sized from your perc rate so treated effluent disperses into the soil instead of surfacing or backing up.
04Aerobic Treatment Units: Oxygen fed units certified to NSF/ANSI Standard 40, a strong fit for tight lots or the heavy clay soils common around Conroe where a gravity field will not pass.
05Perc Test and Site Evaluation: Soil percolation testing that measures drainage, confirms the seasonal water table, and sets the drainfield size the county health department will permit.
06D-Box and Drainfield Repair: We reset settled or clogged distribution boxes and rebuild tired leach fields, restoring even flow across the laterals before a small problem becomes a backup.

What Past Projects Have Cost

Real numbers from real jobs help more than a vague quote. Septic pricing turns on the tank size, the soil, and the drainfield the perc test calls for, so the ranges below reflect what recent Conroe area projects have actually run. We put the firm figure in writing after the site evaluation, before any dig begins.

Tank Replacement$3,500 to $8,500	Full Conventional System$3,500 to $12,500	Aerobic or Mound System$10,000 to $20,000
New 1,000 to 1,500 gallon tank Set watertight and inspected Get a quote	Tank, D-box, and drainfield Sized for a 3 to 4 bedroom home Get a quote	For poor soil or high water table NSF/ANSI 40 certified unit Get a quote

Photos of every installWe document the tank, the D-box, and the open trenches on each job, so you can see exactly what went in the ground.
A repeatable processPerc test, permit, excavate, set, inspect, backfill. The same proven sequence on every Conroe project.
Inspections that passMontgomery County signs off before we cover a single trench, and the approval record comes with the job.
Customers who call backRepeat homeowners and builders keep handing us the next system, which is the review that matters most.

Mavia provides septic tank installation in Conroe, TX, and the finished jobs are the proof of it. New septic system installation, septic tank replacement, drainfield construction, aerobic treatment unit setups, perc testing, and distribution box repair all sit in our completed portfolio. Each of those systems went in under a Montgomery County permit, passed inspection, and got buried clean. Homeowners out along Longmire Road and over in the Grand Central Park area have watched the whole thing happen from the first soil hole to the last shovel of backfill.

A running portfolio tells you more than a sales pitch does. Over the past year we have set 1,000 and 1,250 gallon concrete tanks for three and four bedroom homes, rebuilt a failed leach field near League Line Road, and installed an NSF/ANSI Standard 40 aerobic unit on a tight lot where a conventional gravity field would never have passed. Every one of those projects is documented with dated photos of the tank, the distribution box, and the trenches before we covered them.

The way a project unfolds rarely surprises our repeat customers, because we walk it the same way each time. We start with a perc test and a soil profile, size the tank and drainfield from the results, pull the county permit, then excavate, set the tank level, plumb the inlet and outlet baffles, lay the perforated pipe, and schedule the final inspection before backfill. On a straightforward Conroe lot that runs a few days of actual dig time once the permit clears.

Track record is the whole point. One family off Wilson Road called us back to install a second system on a rental after the first held up, and a builder in the 77304 area now hands us the septic scope on new construction because the inspections keep passing. We are licensed and insured, we grind through the paperwork the health department wants, and we hand you the as built drawing when the job is done. That is the kind of work a portfolio is built on.

The Area Our Portfolio Covers

The finished jobs in our portfolio are spread across Conroe and the rest of Montgomery County, from in town lots to the acreage properties outside the city limits.

Conroe, TX (77301, 77303, 77306)
Willis, TX
Montgomery, TX
Cut and Shoot, TX
Panorama Village, TX
Splendora, TX

Not sure we have worked near you? Call (936) 307-9861 and we will point you to a completed system close by.

Questions About Our Projects

Can I see a septic system you installed near me?: Yes. We keep dated photos of the tank, distribution box, and open trenches from our Conroe area jobs, and we are glad to point you to a finished system in your part of Montgomery County. Call (936) 307-9861 and we will find one close by.
What size septic tank does my home need?: Tank size follows bedroom count. A three bedroom Conroe home usually calls for a 1,000 to 1,250 gallon tank, and a four bedroom home steps up to 1,500 gallons. We confirm the size against the county sizing rules before we order anything.
Do I need a perc test before installation?: Almost always. A soil percolation test measures how fast water drains and confirms the seasonal water table, and Montgomery County uses that result to set your drainfield size. Every conventional system in our portfolio started with one.
How long does a full septic install take?: Once the permit clears, a straightforward Conroe lot takes a few days of actual dig time from excavation to backfill. Heavy clay soil, a mound design, or an aerobic unit can add time, and we tell you the honest schedule up front.
Concrete, polyethylene, or fiberglass tank?: Concrete is the workhorse and the most common tank we set. Polyethylene and fiberglass weigh less and resist corrosion, which helps on some sites. We match the tank to your soil, your budget, and the access to the yard.
Are you licensed and insured?: Yes. We are a licensed and insured local installer, we pull the Montgomery County permit on every job, and we schedule the health department inspection before backfill. You get the as built record when the system is finished.

Start Your Own Project With Us

Ready to add your home to the portfolio? We will run the perc test, size the system to your soil and bedroom count, pull the Conroe permit, and install a system that passes inspection the first time. Call for a site evaluation and a written estimate, and ask to see a finished job near you before you decide.

Call (936) 307-9861