By Alex Reschka · Published April 1, 2026 · Last Updated: April 2026 · 9 min read
Design-build is a project delivery method where one firm handles both architecture and construction under a single contract. The general contractor model separates these roles: you hire an architect to draw plans, then hire a GC to build them. For complex remodels and custom homes in Michigan, design-build typically delivers better cost certainty, clearer communication, and fewer change orders. This guide compares both approaches so you can determine which fits your project.
Design-Build vs. General Contractor: Side-by-Side Comparison
The differences between these two delivery methods affect every aspect of a project -from who you communicate with to how cost overruns are handled. According to the Design-Build Institute of America (DBIA), design-build projects are completed 33% faster than traditional design-bid-build projects on average. The table below compares the two approaches across seven key dimensions.
| Factor | Design-Build | General Contractor (Traditional) |
|---|---|---|
| Delivery Method | One contract, one team (design + construction) | Separate contracts for architect and builder |
| Communication | Single point of contact throughout | You coordinate between architect and GC |
| Cost Certainty | High - cost is evaluated during design | Lower - true cost revealed only after bidding |
| Timeline | Overlapping phases compress schedule | Sequential: design, then bid, then build |
| Accountability | One entity responsible for entire project | Architect and GC may blame each other for issues |
| Design Flexibility | Full custom design with real-time cost feedback | Full custom design but cost unknown until bid |
| Change Order Risk | Lower - issues caught in preconstruction | Higher - design gaps surface during construction |
How Design-Build Works
Design-build integrates architecture and construction into a single workflow. At Reschka Design Build, this process follows five phases. Each phase builds on the previous one, with cost, schedule, and design decisions evaluated together rather than in isolation.
Phase 1: Consultation
The process begins with an in-depth conversation about your goals, your property, and your investment range. This meeting determines whether your project is a good fit for the firm and whether your expectations align with your financial parameters. A reputable design-build firm will tell you honestly if your goals and your range are misaligned -before you spend money on design.
Phase 2: Design Development
Architects develop plans while the construction team provides real-time cost feedback. This is the critical difference from the traditional model. Instead of designing in a vacuum and hoping the project comes in on target, each design decision is evaluated for both its aesthetic impact and its cost impact simultaneously. According to DBIA data, this integrated approach reduces design-phase duration by 20–30% compared to traditional sequential design.
Phase 3: Preconstruction Planning
With design finalized, the team locks in material selections, subcontractor pricing, permit applications, and a detailed construction schedule. This phase produces a fixed-price contract with a defined scope -giving you cost certainty before construction begins. Material lead times are identified and orders placed so that construction can proceed without delays.
Phase 4: Construction
The same team that designed the project manages construction. This continuity eliminates the interpretation gaps that occur when a GC builds from another firm's drawings. Your project manager is a single point of contact for questions, decisions, and updates throughout the build. Site conditions that require adjustments are resolved quickly because the design team is part of the same organization.
Phase 5: Project Closeout
A thorough walkthrough, punch list completion, and warranty documentation close out the project. Because one entity is responsible for both design and construction, warranty claims are straightforward -there is no dispute about whether an issue is a "design problem" or a "construction problem."
How the Traditional General Contractor Model Works
The traditional delivery method separates design and construction into distinct phases managed by different companies. The process typically follows this sequence, and the National Association of Home Builders (NAHB) estimates that 55% of residential projects still use this model, though that share has declined steadily since 2015.
- Hire an architect: You engage an architecture or design firm to develop plans based on your program. Design fees typically run 8–15% of estimated construction cost, paid directly to the architect.
- Complete construction drawings: The architect produces a set of permitted plans. This phase takes 2–6 months depending on complexity and municipal review timelines.
- Solicit bids from general contractors: You send the completed plans to multiple GCs for competitive bids. This bidding phase adds 3–6 weeks to the timeline.
- Select a GC and sign a construction contract: After evaluating bids, you select a contractor and negotiate a contract. The GC's price is based on interpreting the architect's drawings -any ambiguity in those drawings becomes a change order during construction.
- Construction: The GC manages subcontractors and builds the project. If issues arise that require design changes, you coordinate between the architect (who may charge additional fees) and the GC (who may issue change orders).
The sequential nature of this process means total project duration is typically longer than design-build. Design, bidding, and construction happen one after another rather than overlapping.
When Design-Build Makes More Sense
Design-build is the stronger choice for projects where scope, cost, and design decisions are deeply interconnected. Industry research from the Construction Industry Institute found that design-build projects experience 5.2% fewer cost overruns than traditional delivery. The following project types benefit most from the integrated approach.
- Complex remodels: Projects that involve structural modifications, layout changes, or mechanical system upgrades benefit from having the builder involved during design. Structural feasibility and cost implications are evaluated before plans are finalized, not after.
- Main-floor remodels: Reworking a kitchen, dining room, and living area into a cohesive open-concept space requires tight coordination between architectural design and structural engineering. Design-build firms manage this coordination internally.
- Custom homes: Building a new home involves thousands of decisions over 18–24 months. A single team managing design and construction reduces the communication burden on the homeowner and ensures continuity from concept through move-in.
- Projects without existing plans: If you know what you want to achieve but don't have architectural drawings, design-build is the natural starting point. You avoid paying for plans that may exceed your construction target.
- Homeowners who value a single point of contact: If coordinating between an architect and a GC feels like unnecessary complexity, design-build simplifies the experience. One team, one contract, one phone number.
When a General Contractor Might Be the Right Choice
The traditional GC model has legitimate advantages in certain situations. Not every project requires an integrated design-build approach.
- You already have complete plans: If an architect has produced a full set of construction drawings and you simply need someone to build them, a GC can bid competitively on a well-defined scope.
- Simple repairs or maintenance: Roof replacement, siding installation, or window replacement projects do not require architectural design. A qualified GC or specialty contractor is the right choice.
- Cosmetic updates: Painting, fixture swaps, or flooring replacement in existing rooms typically don't require design integration. A GC or handyman can handle these efficiently.
- You want to manage the process yourself: Some homeowners prefer to act as their own project manager, hiring and coordinating specialists directly. If you have construction knowledge and available time, this approach can work for smaller projects.
Cost Comparison: Total Project Cost
A common assumption is that design-build costs more because "you're paying one company for everything." The data tells a different story. Research published by the Construction Industry Institute and corroborated by DBIA indicates that design-build projects cost 6–10% less in total project cost compared to traditional design-bid-build delivery.
The savings come from three sources:
- Fewer change orders: Because the builder participates in design, constructability issues are caught before construction begins. Industry-wide change-order rates on traditional projects typically run 10–20% of contract value. Well-run design-build projects land at 3–7%.
- Reduced coordination waste: When the architect and builder are separate entities, miscommunication generates rework. Rework costs the U.S. construction industry an estimated $31 billion annually, according to the Navigant Construction Forum.
- Compressed timelines: Overlapping design and preconstruction phases can shorten project duration by 15–30%. Shorter timelines mean lower carrying costs (construction loan interest, temporary housing, etc.).
Design fees are included in a design-build contract rather than paid separately to an architect. While the total design-build contract may appear higher than a GC-only bid, the comparison is misleading unless you add the architect's fees and likely change order costs to the GC bid.
Common Misconceptions
"Design-build firms push cookie-cutter designs"
This may apply to production builders, but reputable design-build firms create fully custom designs for each project. The design-build model doesn't constrain design; it integrates cost reality into the design conversation so the final plan is both architecturally strong and financially viable.
"I get better pricing by bidding plans to multiple GCs"
Competitive bidding can reduce construction cost on a well-defined scope. However, it doesn't account for the architect's fees you've already paid, and it introduces a misaligned incentive: GCs bidding on someone else's plans are motivated to find ways to build cheaper, not better. Design-build aligns incentives because the same team that designed the project is accountable for building it correctly.
"Design-build means less owner control"
The opposite is often true. In a design-build relationship, you make design decisions with immediate cost feedback. In the traditional model, you make design decisions with your architect, then discover the cost implications weeks or months later when bids come in. Design-build gives you more informed control, not less.
"I need a separate architect to protect my interests"
This concern assumes the builder and architect have opposing interests. In design-build, their interests are aligned: both are part of the same team working toward the same outcome. If you want independent oversight, you can still hire a third-party inspector or construction consultant regardless of delivery method.
Frequently Asked Questions
What is the difference between design-build and a general contractor?
Design-build combines architecture, design, and construction under one contract and one team. A general contractor handles construction only -you hire a separate architect or designer, then coordinate between the two parties yourself. Design-build reduces coordination risk and typically offers better cost certainty.
Is design-build more expensive than hiring a general contractor?
Design-build projects often cost 6–10% less in total project cost compared to the traditional architect-then-GC approach. The savings come from fewer change orders, reduced coordination waste, and real-time cost feedback during design. The design fee is included in the contract rather than paid separately to an architect.
When should I use a general contractor instead of design-build?
A general contractor is often the right choice for straightforward projects where you already have complete construction drawings -simple repairs, cosmetic updates, or projects where an architect has already produced a full set of permitted plans. For complex remodels, custom homes, or projects without existing plans, design-build typically delivers better results.
How does the design-build process work?
The design-build process typically follows five phases: (1) initial consultation to define scope and investment range, (2) design development where architecture and cost are evaluated together, (3) preconstruction planning including material selections and permitting, (4) construction managed by the same team that designed the project, and (5) project closeout with warranty documentation. See our full process overview.
Does design-build limit my design choices?
No. A common misconception is that design-build firms push cookie-cutter solutions. Reputable design-build firms employ or partner with architects who create fully custom designs. The difference is that cost feasibility is evaluated alongside design decisions in real time, so you avoid designing a project you cannot afford to build. Reach out to discuss your project.