Renovations, new builds, and extensions across the Manawatū
Building High-Quality Homes
Home Renovations
Refreshing and transforming old houses through a home renovation is something our team is very good at. We work on projects of all sizes - from small changes to full-scale residential renovations.
New Builds
From plans to keys in hand, we manage every stage of your dream build with care. We take the time to understand how you live, so we can build something that truly fits.
Extensions & Alterations
Need more room to grow? We handle extensions & alterations that fit with your existing home. This includes kitchen extensions to new bathrooms, making your space more functional and built for everyday living.
Williams Brothers Design & Build believe great homes start with great relationships. We’re a locally owned, New Zealand Certified Builders based in the Manawatū, led by Licensed Building Practitioner Reuben Williams.
Whether you're planning a bathroom renovation, a full-home extension, or your dream new build, we take the time to get your residential build done right. That means no fluff, no pushy sales talk, just solid communication, high-quality workmanship, and a team that treats your project like it’s their own.
Your home, your vision, our expertise.
Our full list of services
We work with you, not just for you. Because people come first, always.
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Full-home renovations
Kitchen renovations
Bathroom renovations
Laundry upgrades
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New home builds
Detached Home
Offices/studios
Secondary Dwellings
Granny Flats / Minor Dwellings
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Room additions (bedroom, living, office)
Garage builds or conversions
Open-plan conversions
Wall removals and structural rework
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Decks and pergolas
Fencing
Cladding and recladding
Outdoor living spaces
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Early contractor engagement
In-house or partnered architectural design
Concept-to-completion project delivery
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Coordinating subcontractors
Schedule and timeline management
Site safety compliance
Budget oversight
Why choose us?
Williams Brothers Design & Build is a family-focused building company based in Ashhurst and servicing the wider Manawatū area. While the business is still young, our foundations are strong. We are built on honesty, integrity, and quality workmanship. We back what we build and stand by the relationships we form with clients, contractors and the wider community. Whether it’s a full home renovation or a new build from the ground up, we’re here to get it done right.
Built on Relationships
At Williams Brothers Design & Build, trust isn’t just earned, it’s built into every project. Known for our straight-up approach, we’ve built a reputation for being reliable, down-to-earth, and easy to work with. We treat every project like it’s our own and believe in open communication from start to finish. We’re proud to be Licensed Building Practitioners and part of the New Zealand Certified Builders network. When you work with us, you know you’re in good hands.
Backed by Quality
Led by Reuben Williams, a qualified builder with over 15 years of experience, our team brings expert craftsmanship and project management to every job. We work alongside a trusted crew of sub-trades, many of whom we’ve built strong relationships with over the years. And just like on site, we’re always learning, staying up to date with new techniques, technologies, and tools so we can offer the best results possible.
Nailed It!
Here’s what our clients say:
“Reuben served as lead builder for our new house construction. Although the project faced some challenges, Reuben collaborated effectively with our architects and various third parties. He communicated progress regularly, helping to achieve an outstanding result. With a bright and friendly personality, he was always eager to provide solutions. We highly recommend Reuben for your next building project, whether it is large or small.”
JUSTINE & RICHARD
Follow our journey
How can we help you?
Get in touch with us!
If you would like to find out more about our experience or the services that we offer, or if you need help or advice with your residential building project, please get in touch with us today.
Phone: 027 528 4519
Email: info@williamsbros.co.nz
Office Hours: 8am - 4:30pm, Monday - Friday
FAQs
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We specialise in residential construction, including renovations, new builds, bathroom and kitchen upgrades, and home extensions. Based in Ashhurst and servicing the wider Manawatū area, we work on projects of all sizes, from small improvements to full home transformations.
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Yes, Williams Brothers Design & Build is a fully certified building company. We’re proud to be Licensed Building Practitioners (LBP) and members of New Zealand Certified Builders (NZCB). That means your project is in experienced, qualified hands, from day one.
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We’re based in Ashhurst and work with homeowners and developers throughout the wider Manawatū area, including Palmerston North, Feilding, and surrounding regions. If you’ve got a project in mind and you're local, we’d love to hear from you.