Building on Oahu takes patience. Land is scarce, permits can take months, and most materials cross an ocean. But new homes with an accessory dwelling unit, built on older lots in town, are some of the most sought-after properties on the island.
In short: LendingStreet finances ground-up construction of 1-8 unit investment property in Honolulu and across Oahu, including spec homes, new main houses with an accessory dwelling unit, duplexes where zoning allows and small 5-8 unit buildings. Loans are sized on loan-to-cost, terms are set per project, and funds are released through a draw schedule after inspections. Plans, permits, a realistic budget and an experienced builder are required.
Most investor construction on Oahu is replacement building: tearing down an older single-wall house in Kaimuki, Kapahulu, Manoa, Aina Haina or Kaneohe and building a new home, often with a detached accessory dwelling unit. Honolulu allows ADUs on many residential lots, and the second unit adds rental income or resale appeal.
Small walk-up apartment buildings are possible in apartment-zoned areas of Makiki, Moiliili, McCully and Kalihi, and new subdivision lots are available in West Oahu around Kapolei and Ewa.
| Project | Where | Key issue |
|---|---|---|
| New home plus ADU | Kaimuki, Kapahulu, Manoa, Kaneohe | Permit time, ADU rules |
| Spec home | East Honolulu, Windward Oahu | Resale price vs cost |
| Duplex | Where zoning allows two-family | Zoning and lot size |
| 5-8 unit walk-up | Apartment-zoned areas in town | Parking, setbacks, fire code |
The city's Department of Planning and Permitting has had well-known backlogs, and the city has introduced third-party review and other reforms to speed approvals. Even so, many projects wait months for a building permit. Most lenders will not fund vertical construction until the permit is issued, so the land carry before closing is on you.
Honolulu also tightened rules in 2019 on large detached dwellings, limiting features such as the number of bathrooms and wet bars in homes over certain sizes, aimed at houses being built as de facto rooming houses. Make sure your design fits current rules before you submit.
While you wait, keep the land costs in mind. Property taxes, insurance and any interest on a land loan continue during the permit process, and those months are part of the true cost of the project even though no construction is happening.
Shipping adds cost and lead time to lumber, steel, windows, fixtures and appliances. Labor is tight, and specialty trades can be booked months out. Sloped lots, rock and drainage add site work in valley and hillside neighborhoods, and some coastal lots fall in special management areas or flood zones with extra review.
This example is illustrative and not a quote. An investor owns a Kaimuki lot bought for $950,000 with an older house to be demolished. Hard costs for a new main house and a detached ADU are $1,100,000, and soft costs, including design, permits, fees and insurance, are $150,000, for a total cost of $2,200,000. In this example the program sizes the loan at 75% of cost, $1,650,000, and the investor's equity, mostly the land, covers $550,000.
Construction runs about 14 months after the permit is issued. With an average of about 55% of the loan outstanding, estimated interest is about $111,169. The finished property sells for $2,650,000. After selling costs of about 5%, estimated profit is about $206,331.
Change the schedule and the result moves. If construction ran 20 months instead of 14, interest would rise by roughly half again, and a modest drop in the sale price would cut deeper still. Build contingency for both the budget and the calendar.
| Item | Amount |
|---|---|
| Land | $950,000 |
| Hard and soft costs | $1,250,000 |
| Loan (75% of cost in this example) | $1,650,000 |
| Estimated interest during build | $111,169 |
| Sale price | $2,650,000 |
| Estimated profit | $206,331 |
Many Honolulu new builds pencil better as a sale than as a rental. Rents on a new home with an ADU are strong, but a DSCR refinance at Oahu prices often supports a smaller loan than the construction balance. If you plan to hold, expect to pay down the loan at completion or keep leverage lower from the start, and run the rental ratio before you break ground.
If you do plan to hold, a permitted ADU is the strongest lever. Two rents on one lot can carry a much larger loan than one, and long-term tenants for both a new main house and a new ADU are easy to find in most Honolulu neighborhoods.
Draws follow the stages of the build: foundation, framing, roof, rough electrical and plumbing, drywall, finishes. An inspector verifies each stage before funds go out. Because materials may be paid for well before they are installed, discuss deposits and stored materials with us up front. Our construction draw schedule calculator can help you map the budget.
We look at the permit status, plans, a line-item budget, the schedule, the general contractor's license and track record, your own experience, and the exit. Projects without plans or permits, or a borrower with no build track record and no experienced general contractor, usually do not qualify.
Share your contractor's recent Oahu projects, especially any new homes or ADUs they have built under current city rules. A builder who knows the inspection process and island supply chain reduces the risk of delays, and that shows up in how a project is reviewed.
When construction is finished, the property is reassessed with the new improvements, and as a non-owner-occupied property it is taxed without a home exemption. A buyer of your spec home may qualify for the exemption, but if you hold it, budget the tax on the full value in the non-homeowner class.
Send your plans, permit status, budget, schedule and exit plan through the form below, or call (877) 298-1001. Our investor loans are business-purpose loans on non-owner-occupied property. We will review the project with you before you commit to more design or permit costs.
On loan-to-cost, with terms set per project. Land equity, experience and the exit all matter.
Generally not for vertical construction. Plan to carry the land through the permit process.
Yes. A new home with an accessory dwelling unit is one of the most common Oahu projects.
Yes, up to eight units. Nine or more is commercial and handled through our multifamily programs.
Terms are set per project to match a realistic schedule, including island lead times.
Yes, if the rent supports the payment. On Oahu, that often means a smaller loan than the construction balance.
No, but you need build experience or a licensed, experienced general contractor.
Yes. See our Hawaii construction loan page.
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