You Trust We Build

Porirua, Wellington, Kapiti, Lower Hutt

Turn your vision into reality with Porirua-based Trust Builders Construction - your trusted house alteration builder


A house extension or alteration is a great way to add more usable space to a home you otherwise love to live in. And by choosing the right builders, you can undertake such a project with confidence.

Trust Builders Construction can help you create functional living spaces tailored to your needs. Whether it's extra space for a growing family, a garage conversion to create a home office or a basement alteration to create a games room, our team can bring your plans to life.

Get in touch with Trust Builders Construction today and make your dream home extension a reality.

Send Us A Message

For a free consultation or quote, please send us a message

House alterations and extensions to make the most of your space

  • Experts in house alteration building, offering bespoke living spaces
  • High-quality craftsmanship, ensuring durability and structural integrity
  • Timely completion, transparent communication, and customer satisfaction
Based in Titahi Bay, we service Porirua, Wellington, Kapiti and Lower Hutt

Add space and improve flow with high-quality house extensions or outdoor alterations

We offer several ways to help you increase space and improve the layout of your home including:

  • adding an additional storey to a one-storey home
  • basement alterations or digging out for extra space underneath your current home
  • side extensions to enlarge a room at ground level
  • converting your garage into another use such as a home gym or home office

Our team can also assist in transforming your outdoor space by installing a laundry into an outdoor area, installing decking, or extending the roof structure. And if you'd like to update particular areas while you are doing building work, we can assist with kitchen and bathroom updates and other renovations.

Our step-by-step process makes your extension project run smoothly


As an experienced construction company, we've developed clear processes to enable us to carry out alterations and extensions efficiently, safely and to meet your exact specifications.

Initial Consultation
We begin with a site visit and have a conversation with you to understand your ideas and desired outcome and to discuss other aspects such as your budget.

Design and Planning
We can work from plans you already have or work with an architect or architectural designer if needed. We can also advise on any practical aspects of the plans to ensure your ideas can be implemented.

Construction and Project Management
With the plans in place, our skilled builders and subcontractors will start the work, following the highest quality and safety standards. We'll project-manage the entire process, providing you with a single point of contact and regular updates on the progress.

Ready to discuss your plans? Get in touch to arrange a quote. Based in Titahi Bay, we work with clients in Porirua, Wellington, Kapiti and Lower Hutt.

You Trust We Build

Porirua, Wellington, Kapiti, Lower Hutt