The View Sold You on the Lot. Then the Builder Looked at the Ground.

What Matters Most

• The view isn't the full story. Volcanic rock, slopes, and soil conditions can increase construction costs.
• Buildability matters. Access roads, utilities, zoning, and drainage can limit where a house can go.
• Investigate before committing. Evaluate sitework costs and building restrictions before finalizing your plans.

The ocean view was exactly what you imagined. Standing at the top of the property, you could already picture the living room windows, a covered lanai, and a driveway winding toward your future home.

The listing showed plenty of space, and nothing about the land appeared particularly complicated.

Then a builder walked the property.

The ground was less level than it looked in the photographs. Volcanic rock covered parts of the proposed building area, and the existing access road might not accommodate heavy construction equipment.

The location you had chosen for the house also raised questions about drainage, excavation, and foundation requirements.

None of this necessarily meant the property was a bad purchase. It simply meant the asking price was only part of the cost.

For buyers considering custom home construction on Hawaiʻi’s Big Island, understanding the land beneath a beautiful view can be just as important as choosing the right floor plan.

The View Doesn’t Tell You What’s Beneath the Surface

Two neighboring properties can offer nearly identical views while requiring very different approaches to construction.

One lot might have accessible terrain that needs relatively little preparation. Another could contain uneven volcanic rock, loose material, or steep sections that complicate excavation and foundation work.

A real estate listing rarely reveals enough about these conditions to estimate construction costs accurately.

How Volcanic Rock, Slope, and Soil Conditions Affect Construction

Volcanic terrain is a defining feature of Hawaiʻi Island, but not all volcanic ground presents the same challenges.

Competent rock may provide suitable foundation support, although excavating it can require specialized equipment. Fractured rock, loose material, and irregular surfaces may require different engineering solutions.

Sloping land adds further considerations.

Will the home require substantial cutting and filling? Could some sections need piers or retaining structures? Where will rainwater flow after the site is disturbed?

These questions affect how the house can be designed and how much site preparation may cost.

A rocky lot is not automatically unsuitable. Likewise, a relatively flat parcel is not necessarily inexpensive to develop.

Before finalizing a design, buyers should ask whether a geotechnical investigation is appropriate. This involves evaluating soil and rock conditions to help inform foundation and construction decisions.

An initial builder walk-through can identify concerns, but it cannot reliably establish final sitework costs without sufficient information.

The aim is to understand any significant limitations before they become expensive surprises.

What the Survey and Listing Don’t Tell You

A property survey can establish boundaries, elevations, easements, and other physical features, depending on its scope.

However, even a detailed survey does not establish everything that can legally or practically be built on the land.

A listing may describe a parcel as residential or emphasize its acreage without explaining the restrictions affecting the proposed home.

Building Setbacks, Natural Hazards, and Community Restrictions

Hawaiʻi’s land-use system includes state land-use classifications, county zoning districts, and other applicable requirements.

Under Hawaiʻi County’s zoning regulations, permitted uses, setbacks, height limits, and other restrictions vary by district.

Consequently, a large parcel may offer considerably less usable building space than its total acreage suggests.

Some communities also have architectural guidelines governing building placement, roof designs, exterior finishes, and other visible features.

Natural hazards require separate consideration.

The U.S. Geological Survey identifies nine lava-flow hazard zones on Hawaiʻi Island. These zones describe relative long-term volcanic hazards based on past activity and terrain.

The agency emphasizes that hazard-zone boundaries are approximate. They help buyers understand regional risk but should not be treated as precise assessments of individual parcels.

Coastal properties may face additional requirements under Hawaiʻi Revised Statutes Chapter 205A, including Special Management Area review and shoreline setbacks.

Properties within designated flood hazard areas may also be subject to additional building standards under Hawaiʻi County Code Chapter 27.

Before purchasing, buyers should review:

• Property surveys and title records.
• Legal access and recorded easements.
• Zoning and applicable land-use restrictions.
• Lava-flow and flood hazard information.
• Coastal requirements, where relevant.
• Community covenants and architectural guidelines.
• Existing permits and approvals.

A sensible pre-purchase assessment combines these records with professional observations of the site.

To understand how the findings could affect a proposed home, buyers can consult a Big Island design-build company such as Imagine Development about building placement, access, and sitework requirements.

Prospective buyers should also confirm whether available permits cover their intended project and whether the property’s hazard exposure affects insurance or financing.

A Beautiful Lot Still Needs a Way In

Standing on an empty property, it is easy to imagine a narrow landscaped driveway leading to the front entrance.

Construction requires considerably more room.

Concrete trucks, excavation equipment, material deliveries, and workers may all need safe access throughout the project.

Why Construction Trucks and Equipment Change Access Plans

A driveway suitable for a passenger vehicle may not accommodate a loaded construction truck.

Steep grades, sharp turns, limited road width, and inadequate turning space can restrict access.

Even the proposed driveway entrance can influence where a house can reasonably be built.

Consider a hypothetical hillside property with an existing gravel track.

The buyer assumes it can serve as the permanent driveway. During the builder’s site assessment, however, it becomes clear that a delivery truck cannot safely negotiate one of the turns.

Possible solutions might include adjusting the route, evaluating retaining structures, or changing how materials are delivered.

Each option can affect the budget.

Before settling on a design, buyers should ask how construction vehicles will enter and leave the property, where materials will be stored, and which access improvements may require approval.

An existing road also does not guarantee a legal right to use it. Title records and easements need to be checked.

Driveway work affecting county rights-of-way may require approvals under Hawaiʻi County rules. State highway access and private roads can involve separate requirements.

These issues are best addressed before construction begins, not when the first heavy delivery vehicle arrives.

The Utilities May Stop Before the Property Line

Undeveloped land can appear ready for a home while lacking essential services.

Electricity may run along the nearest road without extending to the proposed building site. Water availability may be uncertain. Wastewater disposal might require an individual system rather than a public sewer connection.

These details can have a substantial effect on the project’s cost and layout.

How Water, Electricity, and Wastewater Affect the Budget

Before purchasing, ask relevant providers for written information about service availability, connection requirements, and potential extension costs.

Electricity: Nearby power lines do not necessarily mean a connection is immediately available or affordable. Confirm service capacity, installation requirements, and responsibility for additional infrastructure.

Water: Determine whether public water service is available. If rainwater catchment is being considered, evaluate the practical requirements for storage, filtration, treatment, maintenance, and testing.

The Hawaiʻi Department of Health notes that individual-home rainwater catchment systems are not regulated by the department. Owners therefore need to pay particular attention to safe system design and ongoing water quality.

Wastewater: Where public sewer service is unavailable, an individual wastewater system may be required.

The Hawaiʻi Department of Health regulates these systems under Hawaiʻi Administrative Rules Chapter 11-62.

Approval to construct a system and authorization to use the completed installation are separate stages.

System design must account for soil and site conditions, required separation distances, and other applicable requirements.

An apparently unused portion of land may not be suitable for wastewater disposal.

A qualified professional should assess feasibility before the homeowner commits to a final house location.

Most importantly, these systems must fit together.

The driveway, building foundation, drainage improvements, water infrastructure, and wastewater area all compete for space.

Planning them independently can create conflicts that are difficult and expensive to resolve later.

The Best Place for the House May Not Have the Best View

Once the site’s practical limitations become clearer, another decision often follows.

Where should the house actually go?

The highest point might provide the most dramatic ocean view, but building there could require extensive excavation or complicated access.

A slightly lower location may offer easier construction, less disturbance to the terrain, or better protection from prevailing winds.

Rather than assuming the highest point is best, ask the designer and builder to compare two realistic building locations.

Consider excavation, drainage, foundations, access, wastewater requirements, and preliminary sitework costs for each.

The comparison may reveal whether a particular view is worth the additional expense.

Designing for Comfort, Not Just the Outlook

The orientation of a home matters as much as its position.

Large windows facing a western view may admit substantial afternoon heat. A lanai that looks inviting in a rendering could become uncomfortable during windy conditions.

Hawaiʻi’s varied microclimates make these decisions especially important.

Conditions along the Kohala Coast can differ considerably from the cooler, higher-elevation areas around Waimea.

A thoughtful design considers sunlight, prevailing winds, rainfall, drainage, and everyday comfort alongside the scenery.

Sometimes the solution is to adjust the building location. In other situations, changes to window placement, roof overhangs, outdoor seating, or indoor-outdoor connections may be more practical.

The best floor plan is not necessarily the one that captures the widest possible view.

It is the one that makes the property comfortable, functional, and realistic to build.

Price the Groundwork Before Finalizing the Floor Plan

When planning a custom home, it is natural to focus on visible features such as windows, flooring, cabinetry, roofing, and bathroom finishes.

But some of the most significant construction expenses may be hidden beneath the ground or beyond the building itself.

Before agreeing to a final floor plan, buyers should request a preliminary budget that separates the cost of constructing the house from the cost of preparing and servicing the site.

Ask for individual estimates or clearly identified allowances covering:

• Excavation and rock removal.
• Foundation requirements.
• Retaining structures, where necessary.
• Drainage and grading.
• Driveway construction or improvements.
• Electricity, water, and wastewater infrastructure.
• Engineering, surveys, and permits.
• Other site-specific construction work.

The distinction between confirmed costs and assumptions is essential.

Some figures may be based on inspected site conditions. Others may be preliminary allowances until engineering investigations, designs, and contractor quotations are complete.

Ask which costs have been estimated, which remain uncertain, and which have not yet been assessed.

For example, if extensive excavation makes a building location expensive, reducing the home’s square footage may not solve the underlying issue.

Moving the house to a more suitable part of the lot could have a greater effect on sitework costs.

Similarly, an attractive initial construction estimate may be misleading if it excludes major utility extensions, rock excavation, or access improvements.

Ideally, these discussions take place while relevant purchase contingencies remain in effect.

Investigation rights, deadlines, and options to renegotiate or withdraw depend on the signed purchase agreement. Buyers should review those terms with their real estate and legal professionals before applicable deadlines expire.

A beautiful property can still become a wonderful place to live, even when construction is complicated.

The mistake is assuming that the view tells you everything worth knowing.

The homeowner who asks about rock conditions, access, drainage, utilities, and building restrictions before committing to a design is better prepared to make informed decisions.

After all, the goal is not simply to build a house with a spectacular view.

It is to build one that makes sense for the ground beneath it.

Sources

• Hawaiʻi County Planning Department: Zoning & Land Use (opens in a new tab)Hawaiʻi County zoning regulations, permitted land uses, building setbacks, height limits, and land-use restrictions affecting residential construction.
• U.S. Geological Survey: Lava-Flow Hazard Zones (opens in a new tab)Explains Hawaiʻi Island's nine lava-flow hazard zones, relative volcanic risk, and the limitations of hazard maps when evaluating individual properties.
• Hawaiʻi County Planning Department: Special Management Area (opens in a new tab)Coastal development requirements, Special Management Area reviews, and applicable shoreline restrictions affecting construction near the coast.
• Hawaiʻi Department of Health: Rainwater Catchment (opens in a new tab)Guidance on individual-home rainwater catchment systems, including safe water storage, treatment, maintenance, and water-quality testing.