BUILDING? GET THE ROUGH-IN RIGHT.
Available 24/7 for emergencies.
Call 337-344-3920Lafayette · Youngsville · All of Acadiana
New Construction Plumbing
THE SHORT ANSWER
Everything expensive about a house’s plumbing is decided at rough-in, while it is still cheap to move. Hargrave’s does the water, drain, waste, vent and gas for custom homes, multi-family and commercial builds across Lafayette, Youngsville and south Louisiana, from the underground through trim and the final inspection. Licensed and insured since 1995, and we work to your build schedule instead of holding up a slab pour.
On schedule
Slab, top-out, trim, final
4.9 ★★★★★
1,100+ reviews
Since 1995
Building in Acadiana

CREDENTIALED, NOT JUST CONFIDENT
Awards and certifications you can actually verify.
Every badge here is a third party vouching for us, not a slogan we wrote about ourselves.

Acadiana's Choice 1st Place Winner
1st place three years in a row (2024, 2025 and 2026), voted by the people who live here.

LICENSED LMNGF #9436 · LMP #5401 · INSURED
Certified by ASSE International for backflow prevention assembly testing, certification 68664.

Authorized Independent Provider
Authorized to take plumbing work through The Home Depot Home Services program.

Best of Acadiana, 2017
Voted a Best of Acadiana winner by Times of Acadiana readers in 2017.
What are you building?
We plumb custom homes, spec homes, additions, multi-family, retail, restaurants, offices and light industrial across Acadiana, including septic connections, gas piping, water treatment rough-in and ADA fixtures.
Residential
- Custom or spec home
- Addition or garage conversion
- Multi-family or duplex
- Tankless and water treatment rough-in
- Gas for range, heater and generator
Decide the gas load before the slab, not after
Commercial
- Restaurant and commercial kitchen
- Retail or office fit-out
- Grease trap sizing and set
- Backflow assembly and fire line
- ADA and water-saving fixtures
Grease and backflow are permit items, plan them early
Outside the sewer
- Septic system design and install
- Aerobic system connection
- Water well tie-in
- Long service line runs
- Boring under drives
Soil and permits come before the layout
- ★★★★★
They did a great job and were a pleasure to work with.
Julie Christman - ★★★★★
John was AMAZING! So sweet, very knowledgeable. Give him a raise. He's STELLAR! 10 stars. Service side of plumbing is right up his alley.
Madison - ★★★★★
The experience was great! Mr. Colin came same day and effectively fixed my issue.
Christie Charles - ★★★★★
Jacob did an excellent job putting in a swimming pool drain line! It was a tough job hand digging around an existing natural gas line for approximately 60 feet! Thanks Jacob!!
Richard D. Reed - ★★★★★
Zack did a great job! He has done a few services for me and always does a good job and is very personable. Thank you!
Luci Campbell - ★★★★★
Colin (and the company as a whole) was great! He was knowledgeable and assured me throughout the repair.
Grant Delay - ★★★★★
Very hard working and polite.
Craig Little - ★★★★★
Call and scheduling process was very easy. They were able to be on site within 2 hours. Chance was very professional and courteous and provided me with an estimate before and fixed the issue same day.
Tammy Leger - ★★★★★
Delighted with the work, very satisfied, absolutely recommended.
Rosie’ Allain - ★★★★★
Very satisfied, great service
Lar D - ★★★★★
Johnny Johnson was amazing. He was very knowledgeable, professional and polite. I'll call Hargrave's plumbing for future needs and will request Johnny!
Tiffany Gullett - ★★★★★
Company is very responsive, sent technician to our home very promptly. Chance and Jerome were both polite and professional. They serviced our needs quickly!
Meagan - ★★★★★
Kayden was very courteous & thorough. He explained everything in detail & he made sure all was clean & working perfectly before he left. When we need work done in the future we would like him to come back.
C T - ★★★★★
Zach was great at showing and explaining what all was going to be done. Took time to ensure all 3 faults were good and no longer leaking.
Kristina Duhon - ★★★★★
Cordial, on-time, efficient, friendly. Great experience.
malcolm huval ii - ★★★★★
He helped us so much! Worked hard and got the job done in the heat
Alexis Marks - ★★★★★
AJ was excellent, he took time to take care of a difficult clog and a sink leak correctly. Great service and great attitude. Would definitely recommend.
Aaron Dufrane - ★★★★★
Jacob was wonderful!
Sherry Romero - ★★★★★
The two service men who came out were Kaleb and Kaden. Very professional, clean, courteous, and very personable.
June Ducote - ★★★★★
BEST SERVICE EVER!!! Very friendly and knowledgeable and did his job precise didn't let anything get in his way. Top notch service. Zack is the greatest asset to your company.
Renee Morales - ★★★★★
Mr. Johnny is a true professional.
Chase H - ★★★★★
Chance, very professional and knowledgeable. Worked very hard in the heat and didn't stop till he completed.
Shelly Willett - ★★★★★
Chance with Hargrave Plumbing did a great job on our repair. He was extremely professional.
Raylin Massey - ★★★★★
I had a list of plumbing jobs for my home. I called Hargraves plumbing and they were at my house the next day.
Mary Cunningham - ★★★★★
Excellent Service from Start to Finish!
Matthew Brown - ★★★★★
Very professional and hard-working guys! We had two new hot water heaters installed in our very hot attic within 24 hours of requesting a quote. Very reasonable prices and excellent service.
Stacey Mire - ★★★★★
Absolutely fantastic experience.
Farrell Ortego - ★★★★★
I have nothing but good things to say about my experience with Chance S. and the rest of his team at Hargrave's.
Chris Jackson - ★★★★★
Technician Johnny Johnson did an excellent job and left things better than he found them by improving all the lines in and out. Support staff at the shop were excellent to work with!
Alan Broussard - ★★★★★
Mr Johnny came to help us with a tub issue. He was professional and kind.
Chris Cormier - ★★★★★
A definite 5 star experience! Thank you Hargrave's Plumbing. Our technician Zach was a wonder!
Tess Lamb - ★★★★★
I'm so excited and pleased to write this review! My experience with Hargrave's Plumbing was amazing.
Christie Charles - ★★★★★
Thank you Hargrave's Plumbing and Kaleb for the excellent job to replace my 20 year old water heater.
Mark Guilbeau - ★★★★★
Excellent service! We needed a new water heater in our attic. The cost was fair and the owner gave me a discount for same-day install. Highly recommend and will use them again in the future!
Tamara Vincent - ★★★★★
Excellent service! The technicians Luke and Zach were thorough and clearly explained their findings regarding my clogged kitchen sink drain. They provided me with multiple repair options to fix the issue and described each solution, answering all of my questions so that I understood what the repairs entailed and was able to make an informed decision that fit within my budget. Their professionalism and expertise made me feel reassured and comfortable, top notch service and all repairs completed during the same visit. Thank you again Luke, Zach, and Hargrave’s team for taking such good care of me, you’re the best in town!
C N - ★★★★★
Such a wonderful plumbing experience! Fast, reliable and magnificent service! Collin and Chance took care of our delima with confidence and ease. Couldn’t be more pleased with their work and respect for our needs! Thanks Hargrave Plumbing!
Stefni Lotief - ★★★★★
Zack came to McAlister’s and he did a wonderful job! Highly recommend yall ask for him to do the plumbing no problems at all he definitely deserves a raise!!
Scooby Hebert - ★★★★★
Javon was wonderful to work with! He went above and beyond by explaining everything and finding the source of the problems! He provided quotes and advice on moving forward. We will definitely be working with Hargrave’s Plumbing again! Thank you so much!
Tori Thibodeaux - ★★★★★
Zack came out and checked everything. Then quoted cost and came back to the plant and did a quick clean job. Excellent service
Ethel Cantu
When each decision has to be made
The build timeline
Plumbing has four moments on a build and each one closes a door. Knowing that is what keeps change orders off your budget.
UNDERGROUND
Before the pour
Sewer, water and gas stub-outs, tub drains and any slab penetrations. Once concrete is down, moving a drain means breaking it.
ROUGH-IN
Walls open
Supply, drain, waste and vent run and pressure tested, gas lines sized for every appliance including a future generator, water heater location and venting set.
TOP-OUT
Before drywall
Inspection passed, tub and shower valves set, water treatment and recirculation loops in place if you want them. This is the last cheap moment to add anything.
TRIM
Fixtures and final
Fixtures set, water heater fired, gas tested, everything run and checked with you, then the final inspection.
The two things owners most often wish they had added at rough-in: a gas stub for a future generator, and a loop for water treatment. Both are inexpensive now and expensive later.
BOOK ONLINE
Bid in person, scope in writing · licensed and insured.
Building for Acadiana conditions
Slab-on-grade means no do-overs
Almost every home here sits on a slab, so the underground is the one part of the job that cannot be revisited. We check the layout against the final plan before the pour.
Flat lots and little fall
Getting proper fall on a lateral in a flat Acadiana subdivision takes planning at the underground stage, not improvisation at final grade.
Storm-ready from day one
A gas stub for a generator, a backflow assembly on the irrigation and an accessible main shutoff cost very little during the build and matter every hurricane season.
How we work a build
- Plans and a site visitWe read the plans, walk the lot and flag anything that will cost you later: gas load, fall, water heater location, treatment loops.
- Bid and scheduleScope written down and priced in person, tied to your build calendar so the underground is not the thing holding up a pour.
- Four visits, four inspectionsUnderground, rough-in, top-out and trim, each one passed before the next trade needs the space.
- Final walkthroughEvery fixture run, water heater fired, gas tested, shutoffs shown to the owner, warranties registered.
Watch: how it works on a real job
24/7 EMERGENCY SERVICE
Inspection tomorrow and a problem tonight? Call us.
Our emergency line is answered 24/7. Builders call us when a correction has to happen before an inspector arrives, and we would rather take that call than have you miss the window.
Call 337-344-3920 now →Brands we stock and install. Financing available on replacements. Fix it today, pay over time.
BOOK ONLINENew construction questions we get every week in Lafayette and Youngsville
How early should I bring in a plumber?
At plans, before the slab is scheduled. The underground is the only stage that cannot be changed later, and a 20 minute plan review has saved a lot of our builders a jackhammer.
Do you pull the permits?
Yes. We pull the plumbing and gas permits and coordinate the inspections with the parish or city so the schedule holds.
Can you rough in for things I might add later?
Yes, and it is the cheapest money on the job. A gas stub for a future generator, a loop for water treatment and a stub for an outdoor kitchen cost very little at rough-in.
Do you work with builders and general contractors?
Yes, that is a large part of what we do. We give you a written scope, hit the schedule, and if something on the plan will not pass we tell you before it is built, not after.
New construction plumbing across Acadiana
RELATED SERVICES
HELPFUL GUIDES
Assurance Plan members go first.
SEE THE ASSURANCE PLAN →Annual water heater flush, priority scheduling, and two inspections a year.
LICENSED LMNGF #9436 · LMP #5401 · INSURED
3138 Johnston St. Lafayette, LA 70503 · 511 Shore Dr Ste 5, Youngsville, LA 70592
3138 Johnston St. Lafayette, LA 70503 · 511 Shore Dr Ste 5, Youngsville, LA 70592


