Building a new home in New Zealand is likely the biggest financial decision you will ever make. Yet most people start the process by asking the wrong question.
They ask: “Can I afford a custom home?”
The better question—and the one that saves you from financial heartbreak later—is: “Can I afford the hidden costs and rigid limitations of a standard build on my specific section?”
If you own a flat, square paddock in a new subdivision, a volume builder (often called a “Group Home Builder” in NZ) might be a perfect choice. If you are building on a hill in Dunedin, a narrow section in Christchurch, or want a home that performs better than the building code minimum, the “standard” path is often a false economy.
At Connor Jones Group, we believe the building process must be transparent, engineered correctly, and free of “gotcha” moments. This guide explains the real difference between buying a “product” (Volume) and creating a “project” (Custom). It also details how to avoid the traps that catch out many Kiwi families.
The Fundamental Difference: ‘Product’ vs. ‘Project’
To understand the difference, look past the marketing brochures. You need to look at the business models. The two types of builders operate in fundamentally different ways.
Think of it like dining out.
The Volume (Standard) Builder: The “Set Menu”
A volume builder operates like a franchise restaurant. They have a set menu—their catalogue of plans—and a highly efficient kitchen designed to cook only those meals.
- The Pro: It is fast. The sticker price is low because they buy ingredients in bulk.
- The Con: You cannot change the menu. If you want to move a wall, change the cladding, or upgrade the insulation, you disrupt their system. This triggers “Variation Fees” (or “Variations”). These administrative costs can quickly blow out your budget.
- The Reality: The house is designed to fit the market, not your land.
The Custom Builder: The ‘Private Chef’
A residential building specialist operates like a private chef. You do not start with a menu. You start with a discussion about your budget, your land, and your tastes.
- The Pro: The home is designed specifically for your site’s sun, slope, and views. You have total control over where your money goes. You might choose to spend more on high-performance glazing and less on tapware.
- The Con: It requires more involvement from you in the planning stages.
- The Reality: The house is designed to fit you and your specific block of land.
The ‘Architect Trap’: Why You Should Talk to a Builder First
This is the single most painful conversation we have with potential clients. We want to help you avoid it.
The Scenario:
You hire an independent architect or draughtsperson. You spend months and $20,000+ designing your dream home. You fall in love with the plans. Then you take those plans to a builder for a price.
The Result:
The quote comes back $200,000 over your budget.
Why does this happen?
Architects are trained to design beautiful spaces. They do not buy timber and steel every day. They often do not see the price rises in materials until it is too late. When the budget does not match the design, you have two bad options: pay the extra money you do not have, or pay the architect again to re-draw the plans.
The Solution: Pre-Construction Collaboration
To avoid the “Architect Trap,” you must involve your builder during the design phase, not after. This is called Pre-Construction.
When a builder is at the table during design, they can say: “If we move that wall 300mm, we can use standard truss sizes and save you $5,000,” or “That cladding is currently on an 18-week delay; let’s switch to this alternative.”
“A standard builder gives you a price for a plan. A custom builder helps you design a plan for your price.”
We outline this exact roadmap in our guide on how to plan a new home build, highlighting why early collaboration is the key to protecting your budget.
Breaking Down the Costs: Sticker Price vs. Finished Cost
We often hear the question: “What is the cost to build a custom home in NZ vs. a standard build?”
In the custom world, the “square metre rate” is a dangerous myth. A 200m² home with a simple truss roof on a flat slab might cost $3,000/m². That same 200m² home on a hill, with architectural glazing and a structural steel frame, might cost $4,500+/m².
Volume builders can offer lower rates because they average their costs over hundreds of identical homes. Custom builders price the specific engineering of your home.
Understanding the ‘Base Price’
Volume builders often advertise a low Base Price to get you in the door. This price usually excludes the “hard stuff” required for New Zealand conditions:
- Earthworks and retaining walls.
- Driveways and hard landscaping.
- Council fees and levies.
- Waste removal.
By the time you add these essential items plus the upgrades you actually want, the final price is often 20–30% higher than the brochure.
The Hidden Killer: Provisional Sums (PC Sums)
Be very careful with “Provisional Sums” (or PC Sums) in volume contracts.
A PC Sum is an allowance for work where the final cost is not yet known. If a volume builder has not done a geotechnical report on your specific site, their foundation price is just a guess.
In New Zealand’s seismic and volcanic soil conditions, that guess can be an expensive mistake. If they allow $20,000 for foundations but hitting rock costs $50,000, you pay the difference.
The New Zealand Government’s guide to the stages of the building process specifically warns homeowners to understand these contract tags before signing. If the builder hasn’t inspected the ground, the contract price is not real.
Comparison Table: Where the Money Goes
Feature | Volume / Group Builder | Connor Jones Group (Custom) |
Initial Deposit | Low ($1k – $3k). Designed to sign you up quickly. | Higher. Covers meaningful Feasibility work and engineering. |
Site Costs | Often “Provisional” (Estimated). You take the risk on soil/rock. | Investigated upfront. Fixed as much as possible. |
Design Flexibility | Low. “Select from these 3 options.” | Unlimited. “What do you need?” |
Engineering | Minimal. Standard generic slabs. | Site-specific. Engineered for your soil type. |
Change Orders | Expensive. They discourage changes. | Transparent. Changes are managed fairly. |
Determining Your Path: A Decision Framework
Not everyone needs a custom home. Use this “Fork in the Road” guide to decide which path suits your situation.
Scenario A: The Volume Path
This is likely the right choice if:
- You have a flat, square section in a new subdivision with good soil.
- You are happy with a standard layout (e.g., 4 bed, 2 bath, double garage).
- You are building an investment property and resale margin is the only priority.
- You do not have strong preferences for specific materials or eco-performance.
Honest Assessment: If you fit this profile, a volume builder will likely be cheaper and faster than us.
Scenario B: The Custom Path
This is likely the right choice if:
- Your site is difficult: You have a slope, a narrow access, or a unique shape (common in Otago and Southland).
- You have specific lifestyle needs: You need a scullery, a media room with acoustic walls, or a layout for multigenerational living.
- You value performance: You want a home that is warmer, drier, and healthier than the Building Code minimum (e.g., Passive House principles).
- You want longevity: You want materials that last 50 years, not 15.
If you aren’t sure what “Scenario B” looks like in reality, take a look at our projects gallery. You will see how we handle steep sites and complex architectural details that volume builders typically refuse.
Timeline Expectations: Speed vs. Efficiency
It is a common misconception that custom homes take forever to build. In reality, the construction phase is often smoother than a volume build because the planning is better.
Phase 1: Pre-Construction (The Planning)
- Volume: Fast (4–8 weeks). The plans already exist.
- Custom: Slower (3–6 months). This includes Feasibility, Concept Design, Engineering, and Consents.
Phase 2: Construction (The Build)
- Volume: Variable. If you try to change something on site, everything stops.
- Custom: Efficient (6–12 months depending on size). Because every detail was resolved on paper first, the build team can move fast without stopping to ask questions.
The goal is a seamless run from the first pour of concrete until the Code Compliance Certificate (CCC) is issued. On a custom build, we measure twice in the planning phase so we only cut once on site.
Contracts and Risk: What You Need To Know
Fixed Price vs. Cost Plus
Banks generally prefer Fixed Price contracts because they provide certainty. However, a Fixed Price is only as good as the engineering behind it.
At Connor Jones Group, we work hard to provide Fixed Price contracts. We achieve this by doing the engineering rigour upfront. We don’t just guess at the steel required for a beam; we calculate it before we give you the price. This reduces the “tags” and exclusions in your contract.
The Connor Jones Group Difference: Commercial Rigour, Residential Care
At Connor Jones Group, we do not just build houses; we engineer solutions.
We have seen too many people get burned by the “Architect Trap” or the hidden costs of volume building. That is why we developed a Feasibility First approach. Before you commit to a full contract, we do the heavy lifting to ensure your land, your budget, and your dream design actually align.
In-House Engineering & Fabrication (The Secret Weapon)
Most residential builders have to sub-contract their structural steel and engineering work. This leads to delays, markups, and finger-pointing when things do not fit.
We are different. We have our own engineering and fabrication team.
- Complex site? We fabricate the steel for your retaining walls ourselves.
- Architectural design? We engineer and build the structural frame in-house.
This integrated model means we handle the “too hard basket” that volume builders walk away from. Whether it is a steep hill in Dunedin or a high-spec architectural home in Central Otago, we have the team to design it, engineer it, and build it—all under one roof.
Built for the South
With 47+ years of combined experience, founders Tom Connor and Chris Jones know the weather, the soil, and the supply chains of Otago and Southland. We employ Licensed Building Practitioners (LBPs) and bring the strict documentation and safety standards of our commercial and government work to your residential build.
Frequently Asked Questions
Usually, no. Volume builders rely on repetition. As soon as you move walls or change structural elements, you lose the efficiency of the “system.” You end up paying custom prices for a standard product. If you want to make significant changes, start with a custom design.
In Otago and Southland, we highly recommend it. A site might look flat and stable, but if it has unverified fill or volcanic rock beneath the surface, your foundation costs could double. A Geotech report gives you the facts before you negotiate the purchase price.
Yes. If you already have plans, we can price them. However, we highly recommend bringing us in for a Constructability Review before you finalise them. We can often suggest engineering tweaks that save thousands without changing the look of the home.
We mitigate this through early procurement. Because we have our own fabrication facilities, we can order steel and key materials early to lock in the price, protecting you from market fluctuations.
Unverified assumptions. If the soil, engineering, or material choices are not confirmed before signing the contract, the risk shifts to you. This is why PC Sums, provisional allowances, and incomplete engineering are the biggest drivers of blowouts. When everything is costed upfront, cost increases are extremely rare.
Conclusion
Building a home is a journey, not just a transaction.
While a volume builder offers the certainty of a fixed product, a custom builder offers the certainty of an outcome that fits your life. You should not have to choose between a beautiful home and a budget you can afford. With the right planning and the right team, you can have both.
Do not guess at the cost of your future. Book a free consultation with Connor Jones Group today. Let’s start planning your project with real numbers and expert advice.