
Dowman Contracting LTD provides professional residential site preparation services throughout Whanganui. Preparing your section correctly is critical to the success of any new home build, garage or extension. We assess the land, clear vegetation, level the ground and compact the base to ensure it is stable and ready for construction.
Land clearing and levelling
Site shaping and contouring
Base preparation for new homes
Compaction and stabilisation
Residential builds and extensions



Accurate floor slab preparation is critical to the success of any building. We prepare large areas for concrete slabs, ensuring a level and stable base. Our experience with extensive commercial floor slab prep projects means we understand the importance of precision and timing.
Basecourse installation
Levelling and grading
Compaction to required standards
Preparation for concrete pouring

Whether reshaping land for a driveway or preparing for landscaping, we offer reliable earthmoving and levelling services. Our work ensures proper drainage and smooth surfaces for future construction.
Land reshaping
Driveway preparation
Section levelling
Drainage consideration
Residential property improvements


Planning a new shed or outbuilding on your property? We prepare the ground thoroughly to ensure a solid and level base, helping your project progress without delays.
Shed site levelling
Base preparation
Slab ready surfaces
Lifestyle block projects
Accurate and efficient groundwork

We provide professional offal hole excavation for rural and lifestyle properties around Whanganui. Our team ensures the hole is positioned and dug correctly to meet your needs while considering safety and environmental factors.
Excavation to required depth
Suitable placement on property
Rural and lifestyle properties
Safe and efficient digging
Experienced machinery operation



Our retaining wall services help manage sloped sections and create usable outdoor spaces. We construct strong, practical retaining walls designed to support soil and prevent erosion while improving the functionality of your property.
Residential retaining walls
Slope stabilisation
Soil support and drainage consideration
Custom solutions for sections
Built for durability and strength

Dowman Contracting LTD provides reliable farm work and rural earthworks services throughout Whanganui and surrounding districts. We understand that working farms need practical, long lasting solutions that can handle daily use and changing weather conditions. From undercover yard clean outs to farm track formation, we help keep rural properties functional, tidy and accessible.
Undercover yard clean outs
General farm yard reshaping and levelling
New farm track construction
Farm track maintenance and repairs
Rural access and drainage improvements

Focused on Residential Projects
We specialise in residential earthworks rather than large scale civil infrastructure, which means we understand the specific needs of homeowners and local builders.
Reliable and Professional Service
We turn up when we say we will and complete work to agreed timelines. Our clients value our straightforward communication and dependable approach.
Modern Equipment and Skilled Operators
Our team uses professional machinery and proven techniques to ensure accurate levelling, compaction and site preparation.
Strong Local Reputation
With hundreds of followers and ongoing work throughout Whanganui, Dowman Contracting LTD is recognised as a trusted local contractor.
Safety and Compliance Focused
We operate under New Zealand safety guidelines and industry standards, ensuring every project is completed responsibly and professionally.
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Contact our team to discuss your residential project. We will listen to your plans, assess the site requirements and provide practical advice tailored to your property in Whanganui.
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We organise the right machinery and plan the job carefully to ensure safe, efficient and accurate site preparation. We focus on getting the groundwork right so your build starts on a solid foundation.
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Our experienced team completes the job to a high standard, ensuring your site is level, stable and ready for the next stage. We take pride in delivering quality results that homeowners can rely on.

★★★★★
Great to see the scale of work these guys handle. Professional team and top results. Makes a good job well done.

★★★★★
Solid workmanship and reliable service. You can tell they know what they are doing when it comes to large site preparation jobs.

★★★★★
Dowman Contracting prepared our commercial site and the job was completed efficiently and to a very high standard. Excellent communication throughout the process.

★★★★★
We needed ground preparation for storage sheds and the team delivered exactly what was promised. Reliable, organised and easy to deal with.

★★★★★
Professional earthworks contractors in Whanganui. They showed up on time, worked hard and left the site ready for the next stage of construction.

★★★★★
Very impressed with the level of detail and care taken on our project. Would highly recommend Dowman Contracting LTD for civil and groundworks.
Dowman Contracting LTD is a Whanganui based residential earthworks company specialising in site preparation, slab prep, retaining walls and offal holes. We provide reliable, professional groundwork services to homeowners and lifestyle properties across the region.
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