There are two ways to build a custom home. In one, you hire an architect, get a set of drawings, then take those drawings to builders for pricing. In the other, design and construction sit under one roof from the first conversation.
The second is design-build, and the difference is not philosophical. It shows up in whether your plans are buildable within your budget, how long the process takes, and who is accountable when something doesn't line up.
Here is how the design-build process works at Will Johnson Building Company, stage by stage.
Design-Build vs. Design-Bid-Build
| Design-bid-build | Design-build | |
|---|---|---|
| Contracts | Separate: architect, then builder | One, covering both |
| When pricing enters | After drawings are complete | During design |
| Who is accountable | Split between parties | A single team |
| Typical friction point | Plans priced above budget after design is paid for | Fewer, since cost feedback is continuous |
| Changes during design | Require architect revisions and re-pricing | Resolved in the same room |
The most common failure in design-bid-build is predictable and expensive: a homeowner pays for a complete set of drawings, takes them to builders, and discovers the house cannot be built for anything close to the budget. Now the choice is to redesign, which costs more, or abandon the drawings entirely.
Design-build does not eliminate budget pressure. It moves the conversation to a point where changes are still cheap: while the plan is on paper.
Stage 1: The First Conversation
Before drawings, before a lot walk, before anything is committed, you talk about what you are actually trying to build.
Three things matter most at this stage:
Your site. Whether you own land, are under contract, or are still looking. The lot drives more of the design and the budget than most people expect.
Your budget range. A real one, even if approximate. A builder given an honest number designs to it. A builder given no number designs something that may need to be redrawn.
How you live. Not how many bedrooms, but how the house needs to work. Who is home during the day, whether anyone works remotely, how you cook and entertain, whether a parent may move in within a decade.
This is also where you assess the fit. A custom home is a year or more of close collaboration, and the working relationship matters as much as the portfolio. Will Johnson Building Company has worked with Triangle homeowners on that basis for more than three decades.
Stage 2: Site Evaluation
The lot determines what you can build on it, and finding that out early prevents the most expensive surprises.
Site evaluation covers grade, drainage, soil conditions, setbacks, tree protection, and utilities. In Orange and Chatham counties, many lots require a well and septic system, so perc testing and soil evaluation must happen before a design can be finalized. A failed or restricted perc test can completely change the house's size and placement.
Slope, rock, watershed rules, and stormwater requirements vary by jurisdiction across the Triangle. A builder who has worked in Chapel Hill, Pittsboro, Durham, and Hillsborough knows which questions each inspections department will ask.
For buyers still shopping, evaluating a lot before purchase is the better order. A cheaper lot can easily cost more to build once you account for access, grade, and utilities.
Stage 3: Design and Planning
This is the stage that defines design-build, and at WJBC it happens across the table rather than by email.
WJBC leads custom home design and planning in-house, using interactive drawing sessions: client and designer in the same room, developing the plan together in real time rather than exchanging revisions over weeks. Ideas get tested immediately, and so does their cost.
That matters because a design conversation and a budget conversation are the same conversation. If a roofline adds high cost, you learn it while the pencil is still moving. If moving a wall solves a circulation problem, it moves now rather than during framing.
Design work at this stage typically progresses from concept through schematic plans to developed drawings, resolving elevations, the structural approach, and major material decisions along the way. Projects range widely in scale, from modest additions to custom home builds well over 10,000 square feet, and the process adapts to the scope.
Stage 4: Pricing and Agreement
A detailed budget built from actual drawings, not an estimate attached to a sketch.
This is where you should expect specificity. An allowance schedule, itemized. A clear exclusion list. A defined scope. Pricing produced from real plans is meaningfully more reliable than a per-square-foot figure offered before anything is drawn.
Two questions worth asking any builder at this stage: is this fixed-price or cost-plus, and what happens if an allowance comes in under budget? Both answers shape what you actually pay.
Stage 5: Permitting
Jurisdiction-dependent and a frequent source of timeline variance.
The split is concrete rather than vague. The Town of Chapel Hill runs its own Building and Development Services department, and issues permits inside town limits, as do Carrboro and Mebane. Orange County Building Inspections issues permits for rural Orange County and the Town of Hillsborough. Durham and Chatham operate separately again.
Each has its own review times, submission requirements, and inspection scheduling. Projects in watershed districts, historic districts, or with stormwater requirements take longer. Building this realistically into the schedule from the start is more useful than optimism, and knowing which counter a project goes to is the kind of detail that saves weeks.
Stage 6: Construction
Site work, foundation, framing, dry-in, mechanical rough-in, insulation, drywall, finishes, and final inspections.
Two things determine how this stage feels.
Who is on site. Ask for the project manager or superintendent by name, how many projects they run at once, and how long they have been with the company. The person who sells the job is often not the person running it.
Subcontractor relationships. Crews that have worked with the same builder for fifteen years know the standard they expect. Long-standing trade relationships are among the strongest quality indicators available, and they are hard for a newer company to replicate.
Worth doing before you sign with anyone: North Carolina requires a general contractor license on projects of $40,000 or more, and the North Carolina Licensing Board for General Contractors maintains a free public search. Confirm the license is active and held by the exact entity that will sign your contract. It takes two minutes, and it is the one check you can complete without anyone's cooperation.
Selections continue through construction on a schedule tied to when each decision is actually needed, which keeps the process from front-loading every choice into one overwhelming week.
Stage 7: Walk-Through, Closing, and Warranty
A final walk-through, a punch list, and closing, and the house joins our completed work. Then comes the part that separates builders: what happens afterward.
Ask who answers a warranty call in year two, what the documented response window is, and how repairs get scheduled. Then ask a homeowner from three to five years ago whether that process actually worked. Every project has something that needs attention later. How a builder handles it is the real measure.
North Carolina sets a six-year statute of repose for construction defect claims under N.C. Gen. Stat. § 1-50(a)(5), running from the later of the builder's last act or substantial completion.
How Long Does It Take?
Most Triangle custom homes and large renovations run roughly 10 to 16 months from design through completion, including architectural planning, permitting, selections, and construction.
Site conditions, scope, and permitting jurisdiction all move that figure. A complicated lot, a historic district review, or a well-and-septic requirement each add time before construction begins.
What Design-Build Does Not Solve
Worth being straight about this.
Design-build does not make a custom home cheap. It makes the cost visible earlier, which is different and more useful.
It also does not remove the need for decisions. You will make hundreds of them. It removes the gap between the person drawing the plan and the person pricing it, where most of the friction in custom building lives.
And it is not automatically the right choice. If you have a long relationship with an architect whose work you love, design-bid-build may suit you better. The honest answer is that both models work when the people are good.
Working With Will Johnson Building Company
Will Johnson Building Company is a family-owned custom home builder with more than three decades of work across Chapel Hill, Durham, Raleigh, Cary, and Pittsboro. The same team handles design and construction, with design leadership in-house rather than outsourced.
View completed projects in our work, read more about the company on our About page, or explore custom home builds and Chapel Hill custom homes.
If you are weighing a build and want a straight conversation about your site, your budget, and what is realistic, get in touch.
Frequently Asked Questions
What is the design-build process?
A delivery method where one team handles design and construction under a single contract, rather than hiring an architect and then separately bidding the drawings to builders. Cost feedback enters during design rather than after it.
How is design-build different from design-bid-build?
In design-bid-build, you pay for a complete set of drawings before you know whether they fit your budget. In design-build, pricing and design develop together, so budget problems surface while the plan can still change.
How long does the design-build process take in Chapel Hill, NC?
Most Triangle custom homes run roughly 10 to 16 months from design through completion. Permitting jurisdiction, site conditions, and scope all affect the schedule.
Do I need my own architect for a design-build project?
Not usually. A design-build firm provides design in-house or through an integrated partner. If you already work with an architect you trust, we can accommodate that, but the single-contract advantage is reduced.
Can I use my own lot?
Yes. Building on an owner's lot is common and how many Chapel Hill custom homes begin. The site is evaluated for grade, drainage, utilities, and septic requirements before design starts.
What should I ask a design-build firm before signing?
Who leads design, who runs the site day-to-day, whether pricing is fixed or cost-plus, what the allowance schedule looks like, how change orders are handled, and what the warranty covers. Ask for references from three to five years ago, not just recent ones.