Finding the best drainage contractors in New Plymouth matters most when a drain blocks, a section floods after rain or a new build needs sewer and stormwater laid to council standard. The drainage contractors in New Plymouth below cover certified drain laying, blocked drain clearing, CCTV drain inspections, stormwater and septic systems, and larger civil drainage for subdivisions and farms across Taranaki. Ariki Plumbing and Evergreen Plumbing both run dedicated drainlaying teams alongside their plumbing work.
1Ariki Plumbing
Ariki Plumbing and Gas is a family owned plumbing, gasfitting and drainlaying company based on Devon Street West in New Plymouth, travelling throughout Taranaki. Its drainlaying work runs from clearing blocked drains with a mobile hydrojet and locating faults with its own CCTV drain camera through to stormwater, septic and civil drainage. It suits homeowners with an urgent blockage as well as builders and renovators who need drainage planned and installed.
Services
- Blocked and overflowing drain clearing with hydrojetting
- CCTV drain camera inspections
- Stormwater soakholes, soakpits, cesspits and channels
- Septic tanks, effluent fields and onsite wastewater drainage
- Civil drainage networks and water within the boundary line
Highlights
- 24 hour call-out service
- Approved Master Plumbers business
- Team includes certified and registered drainlayers
- Publishes its hourly drainlaying rate on its website
Location & Contact
Name: Ariki Plumbing and Gas Ltd
Address: 219 Devon Street West, New Plymouth 4310
Phone: 06 753 0023
Website: arikiplumbing.co.nz
2Evergreen Plumbing
Evergreen Plumbing Group was established in Hāwera in 2013 and now serves the whole Taranaki region, with a New Plymouth office alongside its South Taranaki base. Its certified team handles sewer and stormwater drainage from design through to installation and repairs, and it also works on septic systems and wastewater design. It suits residential and commercial clients who want one crew for new drainage, repairs and blockages.
Services
- Sewer design and installation
- Stormwater drainage and stormwater disposal
- Drainage excavations
- Drainage repairs
- Clearing blockages
Highlights
- Established in Hāwera in 2013
- Three directors are certifying plumbers, gasfitters and drainlayers
- Offices in both New Plymouth and Hāwera
- Septic system and Taranaki wastewater design service
- 24/7 availability
Location & Contact
Name: Evergreen Plumbing
Address: New Plymouth
Phone: (06) 242 1133
Website: evergreenplumbing.co.nz
3How Good Plumbing, Gas & Drainage
How Good Plumbing, Gas & Drainage is a small family-run business based in New Plymouth, led by owner Isaac Ferry-Parker, a certified plumber, gas fitter and drain layer with more than 14 years in the trade. Its drainlayers take on everything from unblocking and broken pipe repairs to full drain installations for new homes, including the council compliance sign-off. It suits households dealing with a flooding backyard or a blocked drain and owners building or adding to a property.
Services
- Blocked drain clearing and unblocking
- Drain inspections and fault diagnosis
- Cracked, broken pipe and root intrusion repairs
- New drain laying and stormwater drainage systems
- Subsoil and surface drainage
Highlights
- Certified drain layer on every drainage job
- 90-day workmanship guarantee
- After-hours and emergency call-outs
- Handles new build drainage start to finish, including council inspections
Location & Contact
Name: How Good Plumbing, Gas & Drainage
Address: New Plymouth
Phone: 022 506 0124
Website: howgoodplumbing.co.nz
4Laser Plumbing & Electrical New Plymouth
Laser Plumbing & Electrical New Plymouth is a locally owned business in Westown that is part of the national Laser network, formed when Gardiner Plumbing bought Laser Electrical New Plymouth in December 2024 and rebranded. Its drainage team has been drain laying for over 30 years on residential and commercial, new and old properties, and it installs and services secondary wastewater treatment systems. It suits rural and lifestyle owners who need wastewater treatment as well as townhouse owners wanting plumbing, drainage and electrical from one company.
Services
- Residential and commercial drain laying
- AirTech and Devan secondary wastewater treatment systems
- Servicing of other wastewater systems
- Septic, spouting and guttering work
Highlights
- Drain laying in the area for over 30 years
- Formerly Gardiner Plumbing, trading under the Laser brand since December 2024
- Plumbers, electricians and gas fitters under one roof
Location & Contact
Name: Laser Plumbing & Electrical New Plymouth
Address: 1B Sunley Street, Westown, New Plymouth 4310
Phone: (06) 759 0175
Website: lasergroup.co.nz/m/laser-plumbing-new-plymouth
5Graham Harris Ltd
Graham Harris Ltd is a civil construction and earthmoving company in Bell Block, owned since 2017 by Joe Ingram, which offers drainage work across New Plymouth and Taranaki. Its drainage work is at the larger end of the scale: farm drainage, culverts, and new sewer and stormwater systems for subdivisions and commercial developments. It suits developers, farmers and anyone whose drainage job needs excavators and civil works rather than a plumber’s van.
Services
- Farm drainage
- Culvert installations under roads and driveways
- Sewer system installation
- Stormwater systems for subdivisions
Highlights
- NPDC-approved contractor
- Over 40 years in civil construction and roading in the New Plymouth District
- Also handles earthworks, site works, kerbing and demolition
- Runs its own excavators and skid steer loaders
Location & Contact
Name: Graham Harris Ltd
Address: 39 De Havilland Drive, Bell Block, New Plymouth 4312
Phone: (06) 758 1931
Website: grahamharris.co.nz
Drainage Contractors in New Plymouth at a Glance
| Business | Highlight |
|---|---|
| Ariki Plumbing | 24 hour call-out service |
| Evergreen Plumbing | Established in Hāwera in 2013 |
| How Good Plumbing, Gas & Drainage | Certified drain layer on every drainage job |
| Laser Plumbing & Electrical New Plymouth | Drain laying in the area for over 30 years |
| Graham Harris Ltd | NPDC-approved contractor |
How to Choose the Right Drainage Contractor in New Plymouth
- Certification: drain laying must be done or supervised by a certifying drainlayer, so ask who will sign off the work.
- Job size: a blocked drain or cracked pipe suits a plumbing and drainage firm, while subdivisions, culverts and farm drainage need a civil contractor with excavators.
- Diagnostic gear: CCTV drain cameras and hydrojetting find and fix faults without digging up the whole line.
- Council compliance: new drains and alterations usually need a building consent and inspections, so choose a contractor who handles the paperwork.
- After-hours cover: sewage backing up at night cannot wait, so check whether emergency call-outs are offered.
Frequently Asked Questions About New Plymouth Drainage Contractors
Do I need a certified drainlayer for drainage work in New Plymouth?
Yes. Sanitary drainage work in New Zealand must be carried out by an authorised drainlayer, and you can check a person’s licence on the Plumbers, Gasfitters and Drainlayers Board public register before work starts.
Do I need a building consent to lay new drains?
New drainage and most alterations to sanitary or stormwater drains need a building consent from New Plymouth District Council. The council’s plumbing and drainage page explains what is required, and your drainlayer normally books the inspections.
How much does a drainage contractor cost in New Plymouth?
Most drainlayers charge an hourly rate plus materials, with an extra call-out fee after hours. Larger jobs such as new stormwater systems are usually quoted after a site visit, so ask for a written quote before work begins.
What causes blocked drains?
Common causes are tree roots entering joints, fat and grease in kitchen lines, wipes and sanitary products, and cracked or sagging pipes. A CCTV drain inspection shows which one you are dealing with, and hydrojetting clears most blockages without excavation.
Can a drainlayer fix a yard that floods after rain?
Yes. Surface flooding is usually treated with subsoil drains, sumps, soakholes or a new stormwater connection, depending on the ground and where the water can legally be discharged.
Where are drainage contractors in New Plymouth based?
Drainage firms in the city are spread across central New Plymouth, Westown and the Bell Block industrial area, and most travel throughout Taranaki. If you are rural or out towards Hāwera, ask whether travel time is charged.
Who should I call for subdivision or farm drainage?
Large-scale drainage such as subdivision sewer and stormwater reticulation, culverts and farm drains is civil work done with excavators, so a civil construction contractor is usually a better fit than a residential plumber.
What is a secondary wastewater treatment system?
It is an onsite treatment plant used where there is no council sewer connection. It treats household wastewater to a higher standard than a basic septic tank so the water can be dispersed to irrigate the property. Taranaki Regional Council sets the rules for onsite wastewater discharges.
How We Chose the Best Drainage Contractors in New Plymouth
Every business in this guide was found by searching for drainage contractors in New Plymouth, then checked against what the business publishes itself: its own website, or where it has none, its official social or booking page. Names, addresses and phone numbers come from those pages rather than a directory feed, so what you see here is what the business says about itself. We also check that each one is still trading and is actually based in or genuinely serving New Plymouth, rather than a national operator running a local landing page. A business we can’t confirm from its own pages is not listed.