Home › Learn › Owner-Builder vs. General Contractor
Owner-Builder vs. General Contractor: How Much Do You Actually Save?
Short answer: a general contractor typically adds a 20–30% markup to your build cost. As an owner-builder, that markup is what you keep — minus a coaching fee that's a fraction of it — in exchange for taking on the time and decisions yourself.
It's the question every homeowner asks first: if I build my own home, what do I really save? The honest answer is a range, not a promise — because the number depends on your build cost and how involved you stay. Here's how to think about it.
Where the 20–30% comes from
A residential general contractor doesn't usually swing the hammer on your house — they coordinate the trades who do. Their fee, commonly 20–30% of the build cost, pays for:
- Lining up and scheduling subcontractors
- Ordering materials and managing the timeline
- Handling permits and inspections
- Their own overhead and profit
When you're the owner-builder, you handle that coordination yourself — with a coach guiding each decision — so the markup stays in your pocket instead of being added to your bill.
An illustrative example
Numbers vary by project, so treat this as illustration, not a promise. On a hypothetical $400,000 build, a 20–30% general-contractor markup would represent roughly $80,000–$120,000 of cost you'd otherwise pay. As an owner-builder you keep that range — less a coaching fee that's a small fraction of it. Your real figures depend on your plans, your land, and your choices, which is exactly what we map out together on the call.
Owner-builder vs. general contractor at a glance
| Owner-builder (with coaching) | General contractor | |
|---|---|---|
| The 20–30% markup | You keep it (minus a coaching fee) | You pay it |
| Who's the builder of record | You | The contractor |
| Who makes the decisions | You, guided by a coach | The contractor |
| Your time commitment | Significant — you stay involved | Minimal |
| Learning curve | Reduced by coaching | None for you |
The honest trade-off
Keeping the markup isn't free money — it's money you earn by doing the coordinating. You become the builder of record, make the calls, and stay involved from permit to final inspection. Coaching shortens the learning curve and keeps you from expensive missteps, but the project is still yours to run.
For many Carolina homeowners, the markup they keep is well worth the effort. For others — short on time, or who'd simply rather hand it off — a general contractor is the right call. The free 30-minute evaluation exists to help you figure out honestly which one you are, before you've spent a dime on the build.
Carolina Build Journey provides advisory coaching only. The homeowner is always the builder of record. Figures above are illustrative ranges, not a quoted savings amount — your numbers are reviewed individually on the call.
First, is it even legal to build your own home in the Carolinas? →