Construction Project Phases: From Planning Through Closeout

The planning phase defines what the owner wants to build before any design begins. Key activities include:

• • Programming — defining space requirements, functional relationships, capacity needs. For a school: how many classrooms, what grade levels, what support spaces?
• • Site selection and due diligence — evaluating candidate sites for zoning, utilities, soil conditions, environmental constraints, and development feasibility
• • Project budget — order-of-magnitude cost estimate based on program and comparable projects (±30–50% accuracy). This number sets the financial envelope for everything that follows.
• • Delivery method selection — design-bid-build, design-build, or CM-at-risk. This decision shapes the entire project structure.
• • Schedule framework — identifying key milestones, regulatory approval timelines, and the owner's required occupancy date

Phase transition signal: Owner approves program and project budget and authorizes design to proceed.

Design is itself a multi-stage process that progresses through increasing levels of detail:

• • Schematic Design (SD, 15–30%) — building massing, floor plan concepts, structural system type, MEP strategy. Owner sees and approves the overall design direction. Cost estimate updated (±20–30%).
• • Design Development (DD, 50–70%) — design is resolved at the assembly level. Structural system defined, major MEP equipment selected, exterior materials chosen. GMP negotiations on CM-at-risk projects typically occur here.
• • Construction Documents (CD, 90–100%) — complete bid set: all drawings, specifications, and details needed to build the project. Permit application submitted during or after this phase.

Phase transition signal: Building permit issued; GC/CM contract executed (or bids received and contractor selected on DBB).

Preconstruction is the GC's preparation phase — everything that must happen before construction can begin productively:

• • Bid and buy out subcontractors — scope the work, solicit sub bids, level the bids, execute subcontracts. Buyout can take 4–12 weeks for complex projects.
• • Value engineering — identify cost reduction opportunities before construction locks in the design. See our VE guide for the formal process.
• • Submittal schedule development — identify all required submittals, establish the approval timeline, flag long-lead items that must be ordered immediately
• • Construction schedule development — CPM schedule built with input from major subs, identifying critical path and key milestones
• • Site logistics plan — crane locations, material staging areas, traffic management, temporary power and water, worker parking
• • Permit tracking — building permit, grading permit, utility connections, any special permits required for specific operations (crane, road closure, blasting)

Phase transition signal: Building permit in hand; key subcontracts executed; site mobilization authorized by owner.

Procurement runs in parallel with early construction — purchasing materials and equipment, obtaining architect approval of submittals, and confirming delivery schedules. Critical activities:

• • Long-lead item ordering — structural steel, elevators, switchgear, custom curtain wall, generators, and specialty equipment can have 12–52 week lead times. These must be ordered in preconstruction or early construction — waiting until the installation date is ready is too late.
• • Submittal process — subs submit product data and shop drawings; architect reviews and stamps; approved submittals go back to the GC and sub as the installation standard. See our submittal process guide.
• • Material delivery coordination — sequencing deliveries so materials arrive when needed but don't create storage problems or site congestion

Phase note: Procurement failures — late approvals, delayed deliveries, substitution disputes — are among the most common causes of construction schedule delay.

Construction is the execution phase — translating the contract documents into physical work. The GC's key ongoing activities:

Phase transition signal: Substantial completion certified (AIA G704); certificate of occupancy issued.

Closeout transfers operational knowledge of the building to the owner. The GC assembles the complete closeout package and releases the project. See our construction closeout guide for the full sequence — punch list, certificate of occupancy, as-built drawings, O&M manuals, commissioning, final lien waivers, and retainage release.

Phase transition signal: Final payment received; warranty correction period begins (1 year from substantial completion).