Sewer tie-in & lateral work
New connection to the existing lateral or a new lateral to the street.
Garage conversions & backyard units
ADU Plumbing & Sewer Tie-In in Los Angeles
Building a backyard ADU or converting the garage? We handle the plumbing from the sewer tie-in to the last fixture — lateral sizing, ejector pumps, water and gas lines — built to code and ready for inspection.
- Live answer 24/7
- Flat-rate, no overtime fees
- Licensed contractor sent
- Satisfaction guaranteed
Dispatchers available now
Get a flat-rate price for adu plumbing & sewer tie-in
- Price in writing before work starts
- Same rate nights, weekends & holidays
- Ask about this month's coupons
Licensed Contractor
We send one right to your door
24/7 Emergency Service
Nights, weekends & holidays
Satisfaction Guaranteed
100% on every single job
15+ Years Experience
Trusted by local homeowners
ADU Plumbing & Sewer Tie-In
ADU plumbing done right the first time — and inspection-ready
Accessory dwelling units are one of the fastest-growing types of construction in Los Angeles. The plumbing is often where ADU projects run into trouble: the existing sewer lateral may be too small, too shallow, or in poor condition, and the new unit may sit lower than the main line, requiring a sewage ejector pump.
We start by camera-inspecting your existing sewer line to confirm it can handle the added load and to find the best tie-in point. From there we plan the drain, waste, and vent layout, size the water and gas lines for the new fixtures and appliances, and coordinate with your contractor and the city inspector.
Whether you're converting a garage, adding a junior ADU inside the house, or building a detached backyard unit, we handle underground, rough-in, and finish plumbing — so your project passes inspection and your tenants or family have plumbing that works.
What's included
Our adu plumbing & sewer tie-in services.
Everything we handle under adu plumbing & sewer tie-in across Los Angeles, Orange County, the Valley, and the Westside.
Pre-construction sewer camera
Confirm the existing line can handle the new unit.
Sewage ejector pumps
Pump systems for units below the main line.
Underground & rough-in plumbing
Drain, waste, vent, and supply lines to code.
Water line & meter sizing
Supply lines sized for both the house and the ADU.
Gas line extension
Gas for water heaters, ranges, and dryers in the unit.
Water heater & fixtures
Tankless or tank heaters plus finish fixtures.
Inspection coordination
We work with your contractor and the city inspector.
Get a flat-rate adu plumbing & sewer tie-in quote
Tell us what's going on — we'll give you a written price before any work begins.
Don't wait on these
Talk to us early if
Small plumbing problems get expensive fast. If you notice any of these, call before it turns into water damage or an emergency.
Seeing one or more of these signs?
A dispatcher can usually tell you over the phone whether it's urgent — no charge to ask.
Call 877-481-4075- You're in the design phase of an ADU or garage conversion
- Your property slopes and the ADU would sit lower than the sewer
- The house is older and the sewer line has never been inspected
- You need a separate water heater or gas line for the unit
- Your contractor needs a plumber for underground and rough-in
- You're converting part of the house into a junior ADU
- An inspector flagged plumbing corrections on your ADU
- You want a fixed plumbing price before construction starts
How it works
From your call to a job done right.
No guesswork and no surprise invoices — here's exactly what happens when you book with us.
- 01
Site & sewer evaluation
Camera inspection and a review of your plans.
- 02
Plumbing plan & quote
Tie-in point, pipe sizing, and a flat-rate price.
- 03
Underground & rough-in
Installed on your construction schedule and inspected.
- 04
Finish & final
Fixtures set, water heater installed, final inspection passed.
Honest pricing
How much does adu plumbing & sewer tie-in cost?
Every job is different, so we don't guess over the phone and then change the number on site. We look at the problem, then give you a written flat-rate price before any work starts. The price you approve is the price you pay — and it's the same at 3 a.m. on a Sunday as it is on a Tuesday afternoon.
What affects the price:
- Distance from the ADU to the sewer and water connections
- Whether a sewage ejector pump is needed
- Condition and size of the existing sewer lateral
- Number of fixtures, water heater type, and gas needs
Real customers
What homeowners say after the rescue.
Our reviews come from real emergencies — and how we handled them.
Emergency Sewer Backup
“We had a sewer backup on a Sunday night — our laundry room was completely flooded. I called Rooter Rescue at 9 PM and they had a tech at the door within 45 minutes. He cleared a major root intrusion in the main line and had everything flowing again by midnight. I couldn't believe the response time. They're the only plumber I'll ever call.”
Sarah M.
Los Angeles, CA
Slab Leak Detection
“My water bill had been climbing for months and I couldn't figure out why. Rooter Rescue used electronic detection equipment to find a slab leak under my kitchen floor without ripping up a single tile — found it in under an hour. The repair was clean, fast, and came in exactly at the estimate. These guys are total pros.”
Mike T.
Los Angeles, CA
Water Heater Replacement
“My water heater died on a Friday morning. I called three plumbers — two couldn't get to me until next week. Rooter Rescue had a new unit installed that same afternoon. The tech explained every option clearly, gave me a fair price without any pressure, and left the work area cleaner than he found it. Five stars isn't enough.”
Jennifer L.
Los Angeles, CA
Specials & coupons
Save on your next plumbing repair.
Mention a coupon when you call or show it to your technician — we'll apply it to your written quote.
$50 OFF
Any Plumbing Repair
Save on any plumbing repair — leaks, fixtures, valves, drains, and more.
RESCUE50Limited-time offer
Minimum $300 job. Excludes service call / diagnostic fee.
$100 OFF
Water Heater Replacement
Tank or tankless — same-day installation available on most models.
HOTWATER100Limited-time offer
Valid on full water heater replacement with installation.
$35 OFF
Drain Cleaning
Kitchen, bath, laundry, or main line — cleared with rooter or hydro-jet.
DRAIN35Limited-time offer
One drain per visit. Not valid with camera inspection special.
FAQ
ADU Plumbing & Sewer Tie-In questions, answered.
Straight answers to what homeowners ask us most about adu plumbing & sewer tie-in.
Usually, yes — if the existing lateral is large enough and in good condition. We camera-inspect it first. If it's damaged or undersized, we'll recommend lining, replacement, or a new lateral.
Related services
Often booked together.
Service area
ADU Plumbing & Sewer Tie-In near you.
Local service locations across Los Angeles County and Orange County — pick yours for local phone numbers and directions.
- ADU Plumbing & Sewer Tie-In in Beverly Hills
- ADU Plumbing & Sewer Tie-In in Burbank
- ADU Plumbing & Sewer Tie-In in Encino
- ADU Plumbing & Sewer Tie-In in Hollywood
- ADU Plumbing & Sewer Tie-In in Los Angeles
- ADU Plumbing & Sewer Tie-In in Malibu
- ADU Plumbing & Sewer Tie-In in Norwalk
- ADU Plumbing & Sewer Tie-In in Oak Park
- ADU Plumbing & Sewer Tie-In in Pasadena
- ADU Plumbing & Sewer Tie-In in Santa Ana
- ADU Plumbing & Sewer Tie-In in Santa Monica
- ADU Plumbing & Sewer Tie-In in Tarzana
- ADU Plumbing & Sewer Tie-In in West Hills
- ADU Plumbing & Sewer Tie-In in Winnetka
Available right now — 24/7
Need adu plumbing & sewer tie-in? Call now.
A live dispatcher answers every call, 24/7. Get a flat-rate price for adu plumbing & sewer tie-in with no overtime fees for nights, weekends, or holidays.
Get in touch
Request a free adu plumbing & sewer tie-in quote
Tell us what's going on and we'll get back to you within the hour during business hours — or call 877-481-4075 any time for immediate help.
Phone · 24/7877-481-4075Emailinfo@rooterrescueplumbing.comService AreaLos Angeles, Santa Monica, Beverly Hills, Burbank, Glendale, Pasadena, Long Beach, Torrance, Inglewood & all surrounding LA communities
HoursOpen 24 Hours / 7 Days
Active water emergency? Don't fill out a form — call immediately. Every minute of active flooding causes structural damage.