"Will has now completed two projects for us. A carport rebuild and a large gazebo. Both have exceeded our expectations. We gave Will a basic concept and he pulled the job together for us. All completed to budget and we even added extras along the way. I highly recommend Will and his team for excellent workmanship and a quality job."
Auckland - Licensed Builder
House Renovations & Extensions
Across Auckland
O'Neill Construction is a licensed builder based in Glenfield. We do full house renovations and extensions across Auckland - villas, bungalows, room additions, and full structural rebuilds. Over 20 years in construction, every job managed start to finish.
Based in Glenfield. Serving Auckland and beyond.
★ 5.0 / 5 - Google Reviews
LBP Licensed
NZCB Member
Halo 10-Year Guarantee
Free Quote
What's in Scope
House Renovation & Extension Work
House Renovation & Extension Work
We Take On Across Auckland
Full House Renovations
Complete overhaul - new layout, structural changes, updated services, and new finishes throughout, managed start to finish.
Extensions & Additions
Bedroom additions, rear extensions, garage conversions, and second-storey builds - scoped to what the existing structure can carry.
Villa & Bungalow Renovations
A significant part of our Auckland work is on pre-1970s homes. Villas, bungalows, early weatherboard houses - we know what to expect on these builds.
Structural Reconfigurations
Load-bearing wall removal, opened-up living areas, and internal footprint changes - with LBP supervision and consent where required.
Interior Fit-Outs
New room configurations, internal walls in or out, updated linings and finishes without touching the exterior.
Kitchen & bathroom workProject Management
On larger jobs we coordinate the full trade sequence - framing, plumbing, electrical, GIB, painting, tiling. One contact, not five.
Worth Knowing
What to Expect When Renovating a Villa or Bungalow in Auckland
A large proportion of homes in Birkenhead, Northcote, Glenfield, Takapuna, and Devonport were built before the 1970s. Opening them up reveals things that catch builders who don't work on them regularly.
Subfloor Rot & Pile Settlement
Common in older piled homes. Needs to be dealt with before any work above it holds - we assess this at the initial site visit.
Non-Standard Framing
Pre-metric dimensions and materials that don't match modern products - we factor this into the quote rather than calling it a surprise later.
Asbestos Risk
Pre-1990 homes may contain asbestos in cladding, flooring, or ceiling tiles. We assess and advise before any work proceeds.
Character Overlay Properties
Some suburbs face additional consent scrutiny for exterior changes. We flag this before scope is agreed so there are no planning surprises mid-project.
How It Works
How We Run a House Renovation Project
Site Visit
We come to the property, walk through the scope, and assess what the existing structure tells us - particularly important on older homes.
Written Quote
A written quote based on what we've seen, with likely risk areas flagged. Clear scope, not a loose estimate.
Consents
We advise on what's required and work with your designer or architect on documentation where needed.
Strip-Out & Structure
Demolition, structural framing, and subfloor repairs. We communicate before acting if something unexpected comes up.
Services Rough-In
Plumbing and electrical rough-in coordinated before linings go on.
Line & Close Up
GIB, insulation, and internal linings.
Finishing
Painting, tiling, joinery, flooring, and fit-out - including any kitchen or bathroom work in scope.
Sign-Off
Final inspection, Code of Compliance Certificate, and Halo guarantee registration where applicable.
Consents Explained
Do You Need a Building Consent for Your House Renovation?
Cosmetic interior work - painting, flooring, replacing cabinets - generally doesn't need consent. Structural changes, extensions, alterations to the building envelope, and new or altered drainage typically do. We advise on what applies at the initial site visit, before any scope is committed to. If consent is needed, we can coordinate with your designer or architect on the drawings.
Licensed & Guaranteed
The Credentials That Protect
The Credentials That Protect
Your Renovation
Structural renovation work is restricted building work under the NZ Building Act. Here's what we hold — and what it means when it's your home on the line.
LBP Licensed
Structural work — removing walls, adding extensions, altering foundations — is restricted building work. Our LBP licence means it's legal, consented correctly, and signed off with a Record of Work for your property file and future resale.
NZCB Certified
NZCB membership holds every renovation we take on to a certified trade standard above the legal minimum — and is the gateway to the Halo 10-year guarantee on eligible work.
Halo 10-Year Guarantee
Eligible house renovations and extensions qualify for the Halo guarantee — registered independently through NZCB. It covers defects in workmanship and stays attached to the property, not just the current owner.
HazardCo Member
Older Auckland homes often contain asbestos, lead paint, or concealed structural hazards. We use HazardCo to identify and document risks before work starts — protecting our crew and everyone in or around your home during the renovation.
Site Safe Member
Renovation work happens inside and around people's homes. Site Safe membership means we run professionally managed, compliant sites — so your family stays safe while the work is underway.
BCITO Qualified
Renovating existing homes demands more than new-build knowledge — reading structures, working within heritage constraints, and matching finishes across old and new. Will's BCITO trade qualification is the foundation behind every renovation we take on.
Renovation Costs
What Affects the Cost of a
What Affects the Cost of a
House Renovation in Auckland
No set prices - every job is quoted after a site visit. Here's what drives cost on Auckland renovation projects.
Scope
Full structural rebuilds cost significantly more than interior refits. We quote to what the job actually requires.
Existing Structure
Older homes can reveal rot, settlement, or damaged foundations once walls open. We flag likely risks in the quote.
Consents & Council Fees
Application, inspection, and CCC fees vary by scope. We give a realistic range at the site visit.
Materials & Finish Level
Standard spec versus premium joinery and tiling makes a direct difference to total cost.
"Very happy with Will's work! Great value and delivered beyond our expectations for the renovations projects we did!"
"Awesome builder - I'm a roofer and have done lots of projects alongside Will. Would recommend."
"Very happy with the renovations carried out by Will & his team."
Common Questions
House Renovation Questions -
House Renovation Questions -
Auckland
How much does a house renovation cost in Auckland?
Costs vary widely depending on scope, structure condition, consents, and finish level. We come to the property and give you a written quote based on what we actually see - not a ballpark from photos.
Do I need a building consent for my renovation?
Cosmetic interior work generally doesn't need consent; structural changes, extensions, and drainage alterations typically do. We advise on requirements at the initial site visit.
How long does a house renovation take?
Interior-only work can take a few weeks; consented extensions can run several months including Auckland Council's consent lead time. We give you a realistic timeline at the quote stage.
Do you work on villas and bungalows on the North Shore?
Yes - a significant part of our renovation work is on older character homes in Birkenhead, Northcote, Glenfield, Takapuna, and Devonport. We communicate clearly if we find anything the previous owners wouldn't have known about.
Are you based on the North Shore?
We're based in Glenfield and do most of our renovation work across the North Shore, plus wider Auckland within roughly 20km of the city.
Where We Work
Builder Serving
Builder Serving
Auckland & Greater Auckland
We're based in Glenfield and do most of our work across Auckland's North Shore - Birkenhead, Northcote, Takapuna, Milford, Devonport, and the surrounding area. We also travel across greater Auckland within 20km of the city.
Core Area - North Shore
- Glenfield
- Birkenhead
- Northcote
- Takapuna
- Milford
- Devonport
- Hauraki
- Forest Hill
- Browns Bay
- Torbay
- Albany
- Beach Haven
- Birkdale
- Castor Bay
- Murrays Bay
- Campbells Bay
Greater Auckland
- Auckland CBD
- Remuera
- Ponsonby
- St Heliers
- St Mary's Bay
- Mission Bay
- Mount Albert
- Mount Eden
- Parnell
- Westmere
- Ellerslie
- Te Atatu Peninsula
- Titirangi
We do not service South Auckland.
Not sure if we cover your area? Give us a call.
Free Quote
Get a Quote on Your
Get a Quote on Your
Auckland House Renovation
We come to the property, look at what's there, and give you a written quote scoped to what we've actually seen.
Send Us a MessageBased In
56 Park Road
Glenfield, Auckland 0629
Licensed & Certified