The Reality of Building Off Grid From Scratch as an Owner Builder: Part 1 — Design and Permitting on a Budget 

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If you are dreaming of a self-sufficient lifestyle but feel completely overwhelmed by creeping construction costs, strict council regulations, and the sheer scale of doing it yourself, you are in the exact position we were in before we built our home from scratch.

When we decided to build a three-bedroom off-grid home on our remote bush block in Okiwi Bay, NZ, we knew we were signing up for a massive challenge.

We are located an hour away from the nearest main town. For us, the decision to move off-grid was driven by a desire to be as self-sufficient as possible. Because we had the practical skills, that meant building as much of the house ourselves as we could to save money and avoid an open-checkbook style of building.

If you are looking at a similar project, the very first step is acknowledging that you cannot just build whatever you want, wherever you want. You have to work within the constraints of your land and your local regulations.

Navigating the Bureaucracy: Resource and Building Consents

In New Zealand, land use is governed by the Resource Management Act. When we bought our property, it came with a specific resource consent already attached.

This paperwork dictated the rules of what we were allowed to do. The two major stipulations were that no new roading could be put in without an engineer signing it off, and we had a strictly defined limit on how much native bush we could clear.

In the United States, the closest equivalent to a New Zealand resource consent would be navigating county zoning ordinances and local environmental protection agency (EPA) or watershed regulations, which similarly dictate how much land you can clear and where you are legally allowed to build on a remote property. 

Our land paperwork indicated a specific building platform. However, to get the house on the most stable footing, we hired a digger to clear trees slightly further onto a solid part of a ridge. We wanted a foundation built on rock where water could naturally drain down the side of the hill, well clear of any gullies or waterways.

Before we did anything else, we sat down with the resource consent paperwork and flagged every single point we had questions about. We then booked a pre-application meeting with our local district council planning and building inspectors. We told them exactly what we wanted to achieve, which helped us understand their expectations for potable water, structural integrity, and waste management.

Because we were doing the physical work ourselves, we had to sign an owner builder declaration in front of a Justice of the Peace. This legal step allowed us to carry out the restricted structural building work ourselves. It is a fantastic option for saving money, but be aware that it does require a clear understanding of building codes.

You also cannot do everything yourself. You still need certified professionals for specialized trade work. We hired a plumber who was also a certified gas fitter, and a qualified electrician for our 240V wiring, which kept our contractor numbers low and simplified the moving parts of the build.

The Cost-Saving Strategy of a Simple Rectangular Footprint 

Our primary design philosophy was absolute simplicity. We designed the exterior of the house as a simple rectangular box.

Every single corner you add to a house design increases both your material costs and your structural complexity. More corners mean extra flashing layers, complex framing joints, and changing roof lines. A simple rectangle allowed us to build efficiently and keep our expenses predictable.

We chose black Colorsteel for the exterior cladding and the roof because it has excellent longevity and the dark color allows the structure to blend naturally into the surrounding bush.

Because of our remote location and landscape positioning, our site is classified as a high wind zone. This status dictated specific engineering requirements that went straight into our plans. We had to use thicker structural timbers for our exterior walls than a standard build requires, which naturally influenced our interior layout.

To save on high architect fees, we sketched out our own highly precise floor plans and took them directly to a qualified draftsman. A draftsman can handle all the technical compliance and structural drafting required for council approval, but at a fraction of the cost of an architectural firm.

Designing for Comfort: Thermal Mass and Room Layout

We followed basic passive house design principles to ensure the home stays warm without relying on heavy power consumption. Because we are south of the equator, the winter sun sits in the north. We positioned the house to face northeast, which maximized our morning sunshine and captured the best views of the sea.

To trap that solar heat, we designed the front and west faces of the house with extensive double-glazed glass. This sunshine bakes down onto our poured concrete slab floor. The slab acts as a massive thermal mass heat sink, absorbing warmth during the day and radiating it back into the living spaces during the cold bush nights.

Our bedroom layout was entirely strategic. We lined two bedrooms along the southern wall and one at the far end, positioning them so that each bedroom has only one exterior wall. If a bedroom sits on a corner with two exterior walls and multiple windows, your potential for heat loss skyrockets.

We placed our internal utility rooms, including the ensuite, the walk-in larder, the office space, and the main bathroom, as buffers between the bedrooms. This acts as an excellent natural acoustic barrier and traps warmth where we sleep.

We also chose not to build standard built-in wardrobes. Leaving the bedrooms as flexible, open spaces gives us the freedom to rearrange furniture now, or completely repurpose the rooms into media spaces or larger offices once our kids eventually leave home.

Off-Grid Power and Water Strategy

We will break down our exact power setup in a future post, but our initial design required a very strategic electrical layout. We started out with a modest off-grid setup: eight 325W panels, an inverter controller, a key-start backup generator, and a bank of lead-carbon batteries. At the time, we chose lead-carbon because we felt they were the safest, most stable option for us to manage ourselves.

When you live with a smaller system, you cannot put 240V power sockets on every wall like a standard grid-tied home. We had to learn our system limits through pure trial and error, experiencing the occasional system cutout when we overloaded it.

Our initial 240V appliances were strictly functional: a bar fridge, a small freezer, a water pump, a washing machine used mostly on cold cycles, and a single dishdrawer that heats its own water. We eventually learned to put our refrigeration units on timers to maximize our solar runtime during peak daylight hours.

Because of these limitations, we completely omitted 240V plugs from the bedrooms, installing simple 12V USB outlets for device charging instead. We consolidated our heavy-draw 240V sockets into the office, mudroom, kitchen and our walk-in larder to power the fridges, freezers, gas oven and appliances like our bread maker.

For space-heating and cooking flexibility, we installed a large fireplace log burner featuring a built-in bread oven in the base. Because our resource consent allowed us to clear a specific area of our forest, we have ongoing access to free firewood. This setup allows us to cook hearty meals and heat the entire home without drawing a single watt from our battery bank.

Our water infrastructure also required careful planning since our tanks sit too low to rely on gravity alone. We source our water from an all-year-round stream on the property.

The system begins with a submerged pipe resting inside a stainless steel mesh filter bucket in the creek. The water flows into an initial settling barrel, then moves into a massive 40,000-liter tank designated for rural firefighting requirements.

From there, it moves through two secondary 5,000-liter settling tanks before finally being drawn through a triple-filter system, a UV sterilization unit, and a pressure-bladder water pump mounted at the back of the house. Our hot water is generated via a gas califont.

Smart Sourcing and Budget Hacks

Living remotely teaches you to be resourceful with materials, and it allowed us to create the true heart of our home: our custom built concrete kitchen island bench.

We wanted a rustic high-end look without the open-checkbook price tag. To do this, we built a custom steel frame that our kit-set cabinetry could slide directly underneath. We then built timber boxing around the top, laid down a sheet base, and installed steel mesh exactly like you would when pouring a structural floor slab.

To keep costs down and keep the materials local, we sourced white granite stone from a nearby quarry and mixed it with white sand and white cement.

We poured the island bench right there as one massive, heavy slab. Once it cured, we used a grinder to hone deep into the stone and flatten the surface, before sealing it with a clear floor sealer.

We used the same boxing method for the surrounding kitchen benches, molding the concrete specifically to fit our drop-in sink.

To clad the front of the island and create our skirtings and trims, we used reclaimed New Zealand native timber. Some friends were actually about to chop this beautiful wood up for firewood until I spotted it in their garage and they gifted it to us.

A quick word of caution if you try this: by the time you spend the hours dressing, sanding, and sealing old reclaimed timber, it might actually end up being cheaper to just buy off-the-shelf trims.

However, the warmth, character, and personal story it gives our kitchen is completely unmatched!

We took a similar DIY approach to our bathroom and ensuite vanities. Instead of buying expensive off-the-shelf cabinetry, we had a friend make thick slabs of timber which we ran from wall to wall and mounted a simple ceramic basin directly on top, leaving open shelving underneath. These custom bench setups look incredibly unique and saved us hundreds of dollars.

One of our favorite interior layout savers was constructing our own large, rustic timber barn doors for the ensuite and the office. Standard swinging doors take up a substantial amount of floor space in tighter rooms. The sliding barn doors solved our space constraints completely while creating a beautiful, rustic feature. 

My favorite sourcing win for the electrical setup was the lighting. I found a massive house lot of brand-new, old-school 12V halogen downlight housings on Trade Me (Ebay equivalent) for just one dollar each. Technology had moved on to integrated LEDs, so the seller just wanted them gone.

I bought the lot, stripped out the old halogen components, and retrofitted them with modern, energy-efficient 12V LED bulbs.

We wired the house lighting circuit at 24V to minimize voltage drop over the long cable runs, using tiny step-down converters at each light fixture to drop the power to 12V. It required some technical patience, but it saved us a fortune on heavy-gauge copper wiring.

Finally, if you are planning an off-grid lifestyle, you must prioritize storage. We designed a massive, dedicated walk-in larder pantry.

When you live an hour away from the nearest supermarket and focus on homesteading, you cannot just run to the shop for missing ingredients. A large, cool, organized space for long-term food storage and preserves is an absolute non-negotiable for making remote life practical.

Key Takeaways From Our Design Phase

Living off-grid requires a massive shift in how you view structural design and energy. Here are the core insights we gained from planning our build: 

• Audit your land rules early: Print out your resource consent and talk face-to-face with your local council inspectors before sketching a single line.
• Design around the sun: Position your living spaces to capture natural heat and use a thick concrete floor slab as a built-in heat sink.
• Embrace the rectangle: Ditching complex corners keeps your material costs predictable and your rooflines incredibly simple.
• Protect your bedrooms: Keep heat loss to an absolute minimum by designing bedrooms with only one exterior wall.
• Pour your own luxury: You can create a stunning centerpiece like a solid white granite island bench using local quarry stone and basic floor-pouring techniques.
• Reclaimed wood has hidden labor: Free native timber adds unmatched character, but remember to factor in the heavy sweat equity needed to dress and prep it.
• Strategize your sockets: Skip the 240V wall outlets in the bedrooms and run low-voltage 12V USB lines instead to protect your battery bank.
• Build a massive larder: Remote self-sufficiency fails without dedicated space for bulk food, preserves, and extra refrigeration.
• Sourcing takes patience: Look for obsolete or bulk fixtures on second-hand marketplaces that you can easily retrofit with modern energy-efficient tech.

With our council meetings completed, our sketches turned into formal draftsman plans, and our off-grid design strategies locked in, we were finally ready to apply for our building consent and break ground.

In my next post, I’ll take you onto the building platform to share the raw reality of building – from levelling the site in the dark with a laser level to managing a fleet of concrete trucks on a steep bush driveway.