How To Build Your First House As An Owner Builder (Just 5% Down)

How the owner builder path can work on a first house with a low down payment, from pre approval to move in.

The full process for finding land, funding it, and building your own house on a 5% down construction loan. Seven steps: find land, underwrite it, design it, permit it, fund it, build it, and exit. This walks the whole thing, including what actually happens on site, week by week.

Step 1: get pre-approved first

Go to a local credit union and ask for a primary residence construction to permanent loan. They review your financials and give you a number. Say you are approved for $500,000. Add your 5% down, $25,000, and you can build a home for $525,000.

If you would rather not use your financials at all, a private or hard money lender will do it on the deal instead, but expect roughly 15% down. That is three times the cash for the same house.

Step 2: back into the lot price

Work backward from the approval. You want at least 20% equity, so a $500,000 build should be worth $600,000 to $700,000 finished. Land can be about 20% of that value, so around $140,000. That leaves roughly $360,000 for construction. Now you know exactly what you are shopping for.

Convert that budget into square footage. Construction on the West Coast runs about $150 per square foot; Texas is $100 to $120; Florida is $100 to $140 depending on the area; the Carolinas and Georgia sit in the $140s. Add a builder fee, typically 10%, so $150 becomes $165 all in. Divide $360,000 by $165 and you are building about 2,180 square feet.

Step 3: confirm the lot is buildable

Sewer out, water in, power on. Those three decide it. Gas is a bonus, not a requirement. Then zoning, and do not assume: a lot with an existing single family home may be zoned for higher density, which is why we tear houses down.

Step 4: verify the value with sold data, not list data

For sale is an indication. Sold is data. Filter to homes sold in the area with a minimum year built of 2021, so you are comparing genuinely new construction. If three comparable 2,200 square foot homes sold at $680,000, $700,000, and $720,000, your after build value is $700,000.

Now the pro forma: $700,000 value, minus $360,000 construction, minus $140,000 land, leaves $200,000 of equity on about $500,000 of cost, a 40% position. If the house were only worth $600,000, that same cost structure leaves $100,000, a 20% position, which is the floor.

Step 5: draw the plans

You do not need a licensed architect for a house. Every state allows a drafter for single family work; you need an architect for five plus units or three stories. A drafter runs about $1 per square foot, so $2,200 on a 2,200 square foot home, against $3 or more for an architect. The drafter coordinates the engineering and submits for permitting.

Step 6: close on land only when permits are approved

This is the risk-removal move. Sign a two to five month contract on the lot and do not close until permits are approved. Arthur pulls permits in about 5 to 7 weeks in his market. When the city says yes, you close the construction loan with effectively zero entitlement risk.

While permitting runs, the lender builds a budget with your builder, checks your credit and financials, and orders an appraisal to verify the future value. Build your budget conservatively: if construction is really $150 per square foot, submit $160 to $170. Cushion in the construction budget can cover interest payments, and anything unspent just sits in the bank.

Step 7: how a house actually gets built

1. 01

   Survey and excavation

   The surveyor stakes the foundation footprint from your approved plans, offset a couple of feet. The excavator digs. The surveyor returns for a hub and tack survey, pinpointing every foundation angle to the quarter inch.

2. 02

   Foundation

   Forms and poured concrete on the West Coast, block in much of the East. Poured per plan.

3. 03

   Post and beam, then plumbing

   The framer sets the first floor structure, then the plumber runs everything under the crawl space before walls go up, because doing it afterward means crawling.

4. 04

   Framing and trusses

   First floor, second floor, then trusses. Once the perimeter is up, order the windows.

5. 05

   Exterior dry-in

   Roofing first, then siding, then gutters and downspouts.

6. 06

   MEPs in order of size

   HVAC first, because the ducts are largest and hardest to maneuver. Then plumbing in the walls, connecting to what is already in the floor. Then electrical, which weaves through both. Windows must be in before electrical.

7. 07

   Framing inspection

   The big milestone. They inspect electrical, plumbing, HVAC, and the structural work against the engineered plans, including hold downs.

8. 08

   Insulate and drywall

   Once the walls are closed, the rest of the job behaves like a remodel.

9. 09

   Interior finish, in sequence

   Base cabinets first, then flooring set against them, then trim and doors. Countertops before paint, since setting them can nick drywall. Then paint, then all fixtures. Carpet last so it stays clean.

10. 10

    Exterior finish, in sequence

    Pour concrete, set fence posts, do the landscaping, then finish the fence, so the landscaper does not dirty clean fencing.

11. 11

    Certificate of occupancy

    Final inspections produce the CO, your legal permission to move in.

The exit: a 31 year mortgage

Tell the bank the home is finished. They reappraise it built rather than on paper, confirm you built to plan, and the loan converts automatically to a 30 year mortgage. Arthur calls it a 31 year mortgage: one year to build, thirty to enjoy it. Live in it two years or more and the gain is exempt under the same IRS rule, up to $250,000 single and $500,000 married filing jointly. Sell at six months instead and you pay capital gains.

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