What Can You Build for $1M in Nelson Tasman?

As a build-cost budget, one million dollars builds roughly a 180 to 220 square metre architectural home in Nelson Tasman. That is about 220 square metres at our standard rate and about 180 at our architectural rate, before site works and fees.

The honest answer, though, starts with a question: is your million the build cost alone, or the total project? It is the single most important distinction in this whole article, and it changes the floor area a great deal. Below we set out what $750,000, $1 million and $1.5 million each buy at our rates, then explain how to read those numbers against your real budget. Most of our lower-cost builds start around $900,000 to $1 million, so this is the range we know well.

Our indicative build cost starts at $4,500 per square metre for a standard, simple design, $5,500 for architectural or custom work, and $6,500 for luxury, high-end or Passive House builds. Those are build-cost rates only, and the baseline for them is a 220 square metre home including a double garage.

Those rates sit above the national average build cost of about $3,226 per square metre (Cordell Construction Cost Index, to April 2026) and the South Island average of about $3,093 (2024). That is deliberate. The averages blend in group and volume housing built to repeatable plans. We build one-off, high-performance homes, so the comparison is not like for like. For the full regional picture, see the real cost of building in Nelson Tasman.

Because the expensive rooms do not shrink with the house. A compact home still needs the same kitchen, the same bathrooms and the same services as a larger one, so those near-fixed costs spread over less floor area, which pushes the rate per square metre up rather than down.

This catches a lot of people out. The intuition is that a smaller home should be cheaper per square metre, but economy of scale runs the other way. As the home gets larger, the kitchen, bathrooms, plumbing and electrical spread across more area and the rate eases down; as it gets smaller, the same costs concentrate and the rate rises. So a tidy 130 square metre home can carry a higher rate than the 220 square metre baseline our from-rates are based on. It is worth reading alongside how big your house should be, because size and cost per square metre are tied together.

As a build-cost budget, $750,000 buys roughly 135 to 165 square metres at our rates: about 165 square metres at the standard rate, or about 135 at the architectural rate. That is a comfortable, well-planned two or three bedroom home if the design is disciplined.

At this level the smart money goes into getting the envelope, orientation and plan right, then holding the finish restrained rather than sprawling. A compact home carries a higher rate per square metre, as above, so keeping the form simple and the footprint efficient is what makes the budget work. Remember that if the $750,000 is your total project figure rather than build cost alone, the build portion is smaller once site works and fees are removed, and the floor area drops accordingly. A single-storey design on a flat, serviced section is where this budget goes furthest.

As a build-cost budget, $1 million buys roughly 155 to 220 square metres: about 220 at the standard rate, about 180 at the architectural rate, and about 155 finished to a luxury or Passive House spec. This is the range most of our clients build in.

A million of build cost is enough to do one thing properly rather than everything thinly. You can build a generous family home at architectural spec, or a more compact home to a genuinely high-performance standard, with the glazing, airtightness and ventilation that go with a design and build Passive House. The choice between floor area and finish is the real decision here, and open-book pricing is what lets you make it with full information: you see our builder’s margin in the contract, one fair fixed margin, not a hidden premium loaded into materials. How that pricing works is set out in our guide to open-book versus fixed-price contracts.

As a build-cost budget, $1.5 million buys roughly 230 to 330 square metres: about 330 at the standard rate, about 270 at the architectural rate, and about 230 finished to a luxury or Passive House standard. It is the range where floor area and finish stop competing quite so hard.

At this level the budget can carry a larger family home with generous glazing and considered joinery, or a smaller footprint finished without compromise, warm, airtight and quiet, to a high standard throughout. The table below sets out the three tiers side by side on a build-cost basis, so you can see how budget, floor area and spec relate. What separates a build at this level is covered in what sets a high-end build apart.

These floor areas assume the budget is build cost only. If it is your total project figure, read the next section before you rely on them.

This is where the floor areas above stand or fall. The per square metre rate is build cost only. Site works, services, consents, development contributions and professional fees sit on top, and they commonly add 20 to 30 percent to reach the total project cost.

So if you have $1 million all in, the build portion might be closer to $750,000 to $830,000 once those extras are covered, which lands you nearer the $750,000 floor areas than the $1 million ones. The site is the biggest single variable: a flat, serviced Richmond section and a steep coastal block can differ by hundreds of thousands of dollars for the same house, and development contributions alone run from around $1,298 in the rest of the district up to $54,146 in the Waimea and Richmond catchment (Tasman District Council, 2024). On top of all of it, hold 10 percent as contingency. If you cannot afford the contingency, you cannot afford to build. Understanding why build costs blow out is the best defence against the total creeping past the build figure you first had in mind.

For around one million dollars of build cost, expect roughly a 180 to 220 square metre architectural home in Nelson Tasman; $750,000 buys a disciplined 135 to 165 square metre home, and $1.5 million buys 230 to 330 square metres or a smaller footprint finished to a luxury or Passive House standard. All of those figures assume the budget is build cost only, before site works and fees add their 20 to 30 percent.

The number that matters most is the one you have not decided yet: whether your budget is the build or the whole project. Get that straight, assess the site early, and hold your 10 percent contingency, and the rest becomes a clear conversation about floor area versus finish. If you are planning a home across Kaiteriteri, Motueka, Upper Moutere, Mapua, Richmond or Nelson, the best first step is to arrange a consultation and price the specific site before the design is locked in. You can see how we work on our design and build page and browse our projects.