Finding the best retaining wall builders in New Plymouth starts with matching the wall to the site, whether that is a timber pole wall on a steep Taranaki section or an engineered block wall behind a new driveway. Retaining wall builders in New Plymouth handle everything from slip remediation and underpinning to drainage, council consents and the final build, for homes, commercial sites and farms. Specialists such as Ashton Sims Construction and Ground Up Solutions cover timber pile, I-beam and engineered retaining work across the district.
1Ashton Sims Construction
Ashton Sims Construction is a locally owned New Plymouth company specialising in timber pile retaining walls, underpinning and ground stabilisation. Owner-operator Ashton Sims works on residential and small-scale commercial projects, with a focus on technical and limited access sites, from flat sections to near-vertical banks. It suits homeowners with a difficult slope who want the builder to manage engineering and consents as well as the wall itself.
Services
- Timber pile retaining walls
- Existing retaining wall repairs
- Underpinning and pole foundations
- Slip remediation and site preparation
- New build site scrapes and earthworks
Highlights
- Owner-operated by Ashton Sims, who works on site
- Experienced with technical and limited access jobs
- Project management including engineering, council consents and sub-contractor management
- Free on-site consultation and quote
Location & Contact
Name: Ashton Sims Construction
Address: New Plymouth
Phone: 027 738 2467
Website: asconstruction.co.nz
2Ground Up Solutions
Ground Up Solutions is a family owned landscape construction and ground stabilisation company based in Spotswood, trading since 2008 and owned by Rob and Lesley Sullivan since 2021. Its Ground Up Stabilisation division handles piling, foundation systems and engineered retaining, from timber and I-beam walls to larger slope stabilisation work. A good fit for residential, commercial and rural clients who want the retaining wall, fencing and concrete work done by one team.
Services
- Timber and I-beam retaining walls
- Engineered retaining solutions and erosion control
- Pile driving, including driven, bored and reinforced concrete piles
- Underpinning and ground improvement
Highlights
- Trading in Taranaki since 2008
- In-house engineer and Licensed Building Practitioner
- Manages the building or resource consent process for retaining walls
- Also builds ponga walls, decks, fencing and concrete driveways
- Covers Onaero and Urenui through to Inglewood, Stratford, Hāwera, Okato and Ōpunake
Location & Contact
Name: Ground Up Solutions
Address: 21 Manadon Street, Spotswood, New Plymouth 4310
Phone: 06 758 2217
Website: groundupsolutions.co.nz
3Excavat
Excavat is an earthworks and civil contractor based in Hāwera that designs and builds retaining walls across Taranaki and Whanganui, including New Plymouth, Bell Block and Waitara. Its retaining work leans towards engineered walls for council, commercial, civil and subdivision projects, alongside smaller residential jobs. It suits larger or load-bearing walls where excavation, drainage and the wall are best handled by the same crew.
Services
- Engineered retaining wall construction in timber pole, concrete block, gabion and keystone
- Slope stabilisation and erosion control
- Drainage and stormwater integration behind walls
- Excavation and foundation preparation
- Retaining walls for subdivisions and civil infrastructure
Highlights
- Founded in 2017
- Completed the Matau Road retaining wall remediation for Stratford District Council
- Coordinates engineering and council consents where required
Location & Contact
Name: Excavat
Address: 47 Scott Street, Hāwera, Taranaki
Phone: 0800 314 437
Website: excavat.co.nz
4Taranaki Construction and Maintenance
Taranaki Construction and Maintenance (TCM Ltd) is a New Plymouth multi-trade building company whose block laying team builds concrete block retaining walls alongside boundary, garden and structural walls. Retaining walls are one part of a much wider building and maintenance service, so it suits clients who want a block retaining wall as part of a larger renovation or hard landscaping job.
Services
- Engineered concrete block retaining walls
- Reinforced blockwork with steel and core fill
- Decorative split-face and honed block walls
Highlights
- NZ Certified Builders member
- Manages footings, steel, inspections, drainage and waterproofing
- Advises on consents and engineering for retaining walls
- One team covering excavation, concrete and finishing
Location & Contact
Name: Taranaki Construction and Maintenance Ltd
Address: 15 Saltash Street, New Plymouth 4312
Phone: 06 753 4862
Website: tcmltd.co.nz
Retaining Wall Builders in New Plymouth at a Glance
| Business | Highlight |
|---|---|
| Ashton Sims Construction | Owner-operated by Ashton Sims, who works on site |
| Ground Up Solutions | Trading in Taranaki since 2008 |
| Excavat | Founded in 2017 |
| Taranaki Construction and Maintenance | NZ Certified Builders member |
How to Choose the Right Retaining Wall Builders in New Plymouth
- Wall type: timber pole walls suit most residential slopes, while concrete block, gabion or I-beam walls may suit higher loads or a more permanent finish. Ask which the builder recommends for your soil and why.
- Engineering and consent: confirm whether your wall needs an engineer’s design and building consent, and whether the builder will manage that process for you.
- Drainage: a retaining wall fails most often because water builds up behind it. Ask how drainage, backfill and outlets will be handled.
- Site access: tight or steep sections need smaller machinery and experience with limited access work, so check the builder has done similar jobs.
- Licensing and insurance: check whether the person supervising the work is a Licensed Building Practitioner and that the business carries public liability insurance.
Frequently Asked Questions About New Plymouth Retaining Wall Builders
Do I need a building consent for a retaining wall in New Plymouth?
Often, yes. Taller retaining walls, and walls that support a load such as a driveway, building or another wall above, generally need building consent and an engineer’s design, and some walls also need resource consent. New Plymouth District Council explains the requirements on its fences and retaining walls page. Many retaining wall builders will manage the consent process for you.
What type of retaining wall is best for a sloping section?
Timber pole or timber pile walls are the most common choice for residential sections in Taranaki because they are cost-effective and suit most soils. Concrete block, gabion, keystone and I-beam walls are used where loads are higher, the wall is taller or a more permanent finish is wanted. A retaining wall builder will usually recommend a type after a site visit.
How do I check a retaining wall builder is licensed?
Ask whether the person designing or supervising the work is a Licensed Building Practitioner, particularly on consented or engineered walls. You can check any name against the public register on the Licensed Building Practitioners website.
How long does it take to build a retaining wall?
A small timber wall can take a few days, while larger or engineered walls take longer, especially where design and consent are needed first. Weather, site access and the amount of excavation all affect the timeframe, so ask for an estimate with your quote.
Can a failing retaining wall be repaired rather than replaced?
Sometimes. Leaning, bulging or cracked walls can often be repaired or strengthened if the cause, usually poor drainage or undersized piles, is fixed at the same time. Where the wall has moved significantly, replacement is usually the safer option. Several builders in New Plymouth offer wall repairs and slip remediation.
Can I find a retaining wall builder near me in New Plymouth?
Most retaining wall builders in New Plymouth travel to the site, so where they are based matters less than the area they cover. Ground Up Solutions works from Spotswood and covers the wider Taranaki region, TCM Ltd is based in New Plymouth, and Excavat works from Hāwera and services New Plymouth, Bell Block and Waitara.
Who is responsible for a retaining wall on a boundary?
Responsibility usually depends on which property the wall supports and any agreement between neighbours. If a wall sits on or near a boundary, talk to your neighbour early and get advice from the council or a builder before work starts.
How We Chose the Best Retaining Wall Builders in New Plymouth
Every business in this guide was found by searching for retaining wall builders 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.