Home Extensions Wellington
From extra bedrooms and larger living areas to full second-storey additions, we manage every detail - planning, design, council consents, construction, and finishing - with a focus on quality and cohesion.
At West Beach Construction, we specialise in building high-quality home extensions that feel like they’ve always been part of your home. Whether you’re growing your family, working from home, or simply need more living space, we can help you expand without the stress of relocating.
Call Ethan on 022 621 5980
Home Extension Services
Single-Storey Extensions
Add extra rooms, expand your kitchen or lounge, or create new living zones to suit your lifestyle.
Second-Storey Additions
Build up, not out - ideal for tight sites or to capture views. We ensure structural integrity and visual consistency.
Seamless Integration
Matching rooflines, cladding, joinery, and interiors to ensure your extension looks and feels right.
End-to-End Project Management
We manage every stage, from design and permits to build and final sign-off.
Custom Solutions
Every extension is tailored to your property, needs, and budget for the best possible outcome.
Why Choose West Beach Construction for Your Home Extension?
How an extension runs with West Beach Construction
Site visit and a conversation about what the new space needs to do. Then design and consent, where we provide builder input early so the drawings are buildable and priced realistically; you can use a designer we work with or your own architect. The build follows: foundations, framing, roof, cladding, joinery, services, linings and finishing, with the existing house kept weathertight and usable. We match cladding profiles, roof pitch, window styles and floor levels so the addition reads as part of the original house.
Where we build extensions
We are based at Timberlea in Upper Hutt and work across the Wellington region: Wellington city from Karori and Johnsonville to Miramar and Island Bay, Lower Hutt including Petone, Eastbourne and Wainuiomata, all of Upper Hutt, Porirua, and the Kapiti Coast from Paekakariki to Otaki. Travel is built into the quote, not added afterwards.
For Upper Hutt see our home extensions in Upper Hutt page.
Consent, timeframes and cost
Adding floor area always needs a building consent, and your council's district plan sets site coverage, height and boundary rules that decide what fits. Design and consent typically take two to three months; the build is usually three to five months for a single storey extension and longer for a second storey. Cost is driven by size, foundations, structural work at the junction with the existing house, roof complexity, joinery and interior finish. Second storeys cost more per square metre because of the engineering and the work to the existing roof.
What clients say
"Ethan and the team did an awesome job replacing a rotten bottom plate, and replacing a rotten floor in the basement of my rental property. The quote was very detailed and he solved problems I did not realise I had without asking, like swapping the door opening direction so it does not strike the new floor. Will definitely use West Beach for the next few building jobs."
Homeowner, Hataitai, Wellington - verified Builderscrack review, January 2026
Extension builders involved from the design stage
As home extension builders based in Upper Hutt, we like to be involved from the early design conversations, so the drawings that go to council are ones we can build and price with confidence. It is far cheaper to fix a junction with the existing roof or a floor level on paper than on site.
Extensions often go hand in hand with other work. A larger living area is usually the moment for a new kitchen renovation, and new doors to the garden are often planned with a timber deck so the floor levels line up. Where the existing layout is the problem rather than the size, a renovation of the existing house can cost less than adding floor area. Our guide to planning an addition with your extension builder covers budget, design and consent in more detail.
FAQS
Frequently Asked Questions
West Beach Construction builds a wide range of home extensions, including single-storey additions, extra bedrooms, expanded living areas, and full second-storey extensions. Every project is designed to suit your home, site, and lifestyle while maintaining a cohesive look and feel.
Yes. We place strong emphasis on seamless integration. This includes carefully matching rooflines, cladding, windows, and interior finishes so your extension feels like it has always been part of your home, not an afterthought.
Absolutely. We provide end-to-end project management, handling design coordination, engineering requirements, council consents, construction, and final sign-off. This ensures compliance with all local building regulations and a smoother process for you.
In most cases, yes. We plan our work to minimise disruption and maintain safe access to your living spaces wherever possible. If certain stages require alternative arrangements, we’ll clearly explain this before work begins.
Simply call Ethan on 022 621 5980 to arrange a consultation. We’ll discuss your ideas, assess your property, and provide clear advice and a detailed quote tailored to your needs and budget.
If you like the street and the section has room, extending is often the cheaper way to get the space you need. We are happy to give you a realistic scope and cost before you decide. Our guide on whether to extend or move covers the trade-offs.
Yes. Most of our Wellington extensions are on sloping sites. Foundations, retaining and access are planned on the first visit rather than discovered later.
Ready to start your home extensions project? West Beach Construction is here to help!
See what our clients say about our service
Let’s Build the Space You Need
Ready to add more room to live, work, or relax? West Beach Construction delivers expert home extensions with craftsmanship you can trust and a process you can rely on.