Pillar 3 of 3 · Updated April 2026
Commercial Construction Process & Project Delivery
The owner’s playbook for running a commercial project — the 7-phase lifecycle, delivery methods (design-build, DBB, CMAR, IPD), contract structures (GMP, cost-plus), schedule and procurement strategy, decision frameworks, project roles, and the change-management discipline that keeps schedule and budget intact.
AEO Quick Answer · 2026 Process & Delivery Reference
Commercial construction follows a 7-phase project lifecycle: Programming → Schematic Design → Design Development → Construction Documents → Procurement → Construction → Closeout. The owner’s biggest decisions are delivery method (design-build, DBB, CMAR, IPD) and contract structure (GMP, cost-plus, lump sum).
Engaging the GC at schematic design compresses overall schedule 15-25% and reduces cost variance from approximately 12% to 2% versus engaging at construction documents. Design-build delivery now accounts for nearly half of U.S. nonresidential construction spending per DBIA. TCG owner’s rep, design-build, and construction management services cover the full project lifecycle nationwide.
Sources: DBIA, AIA, AGC, CMAA, NAIOP, CFMA, TCG project data 2014–2026.
100+ yrs
Combined Team Experience
15–25%
DB Schedule Compression
12% → 2%
Cost Variance (DB vs DBB)
2 min
TCG.ai Budget Estimate
Section 1 · The 7-Phase Lifecycle
The Project Lifecycle — Programming Through Closeout
Every commercial project moves through seven phases. Decisions in the first three drive 60-80% of total project cost and schedule. Engaging the GC and key consultants at schematic design — not later — is the single highest-value process decision an owner makes. How design-build telescopes the phases.
Phase 1
Programming
2–6 weeks
Owner needs analysis, site evaluation, regulatory framework, preliminary budget framing, and schedule targets. The work that determines whether the project is feasible. Skipping or rushing programming is the leading cause of cost surprises in DD.
A&E fees include programming.
Phase 2
Schematic Design (SD)
4–12 weeks
Concept design, building system selection, code analysis, and preliminary cost estimate.
Engage GC at SD for design-build or CMAR delivery. SD is where 60-70% of cost is locked in — selection of envelope, structure, and MEP at this phase determines lifetime cost.
Early GC engagement.
Phase 3
Design Development (DD)
8–16 weeks
Detailed design, MEP integration, structural finalization, specifications, and GMP development. GMP is typically locked at end of DD on design-build and CMAR projects. Long-lead procurement decisions begin here.
TCG architectural design-build.
Phase 4
Construction Documents (CD)
6–14 weeks
Permit-ready drawings and specifications. Coordination of architectural, structural, MEP, fire protection, and specialty consultants. CD package supports permit submission, sub buyout, and final GMP confirmation.
How to read a GC bid.
Phase 5
Procurement & Permit
8–26 weeks
Permit issuance, long-lead equipment release (HVAC, switchgear, transformers), sub buyout, mobilization planning.
2026 material lead times drive most schedule risk — switchgear at 24-52 weeks, transformers 26-52+ weeks.
Phase 6
Construction
4–36+ months
Site work, foundation, structure, envelope, MEP rough-in, finishes, and FF&E coordination. Sub coordination, schedule management, RFI/submittal flow, change order management, safety, and quality control.
TCG construction management ·
Power of sequencing.
Phase 7
Closeout
4–12 weeks
Punch list, commissioning, training, O&M manuals, certificate of occupancy, final retainage release, and warranty turnover. The phase that typically gets compressed and creates the most disputes — build closeout into the schedule, not as an afterthought.
Owner’s Rep at Closeout →
Section 2 · Delivery Methods
Six Delivery Methods — And When to Use Each
Delivery method is the structural decision that shapes contracting, risk allocation, schedule, and team integration. Six methods cover virtually all U.S. commercial work. Cost-plus vs GMP comparison · Importance of design-build.
Method 1
Design-Build (DB)
Single contract · Fastest delivery
Single entity carries design and construction.
Per DBIA, design-build now represents nearly half of U.S. nonresidential spending. Compresses schedule 15-25%, reduces variance, eliminates designer-builder disputes.
TCG design-build.
Method 2
Design-Bid-Build (DBB)
Sequential · Lowest first cost
Owner contracts architect, then bids construction after design is complete. Standard on public work and smaller projects. Delivers competitive bid pricing but extends schedule, increases cost variance, and creates designer-builder gaps that drive RFIs and change orders.
Apples-to-Apples Bidding →
Method 3
Construction Manager at Risk (CMAR)
CM joins at SD · GMP at DD
Owner contracts architect and CMAR separately, but CMAR engages at schematic design as a constructor and converts to GC under a GMP at DD or CD. Captures most DB schedule benefit while preserving owner control of design.
TCG CM Services →
Method 4
CM Agency (CMa)
Advisor only · No construction risk
Construction manager acts as owner’s advisor without holding construction contracts. Owner direct-contracts trade subs. Used on large public projects, hospitals, and complex multi-prime work where the owner wants direct contractual control of trades.
Owner’s Rep vs CMa →
Method 5
Cost-Plus & T&M
Open book · Owner carries cost risk
Owner pays actual cost plus a defined fee. No price cap (unless paired with GMP). Appropriate for highly complex, evolving, or emergency scopes where pricing certainty would force premium contingency. Requires high trust and tight controls.
Cost-Plus vs GMP →
Method 6
Integrated Project Delivery (IPD)
Multi-party agreement · Shared risk
Single multi-party contract among owner, designer, and contractor with shared risk and reward pools. The most integrated delivery model. Best fit for highly complex projects with sophisticated owners — healthcare campuses, research, and large institutional work.
DB Trends →
Section 3 · Contract Structure & Risk
Contract Structure, Contingency & Risk Allocation
Contract structure determines who carries which risks — cost, schedule, scope, performance. Six contract levers shape every commercial project. Managing construction risks.
Pricing
Guaranteed Maximum Price (GMP)
Cost cap · Savings to owner
Contractor commits to a not-to-exceed cost. Savings below GMP flow to owner per contract (commonly 50/50 or 100% to owner). Standard structure for design-build and CMAR delivery. Locked at end of DD or CD when scope is well-defined.
Reading the GMP →
Contingency
Construction & Owner Contingency
5–15% total project
Reserved budget for unforeseen and scope evolution. Three layers: design contingency (5-10% during SD/DD), construction contingency (3-10% on GC line), owner’s contingency (5-10% held by owner). Cold storage, cannabis, healthcare, data center warrant the higher end.
Soft Cost Layers →
Allowances
Construction Allowances
Placeholder · Reconciled at completion
Dollar placeholders for items not yet specified at GMP — flooring, casework, FF&E, signage, specialty equipment. Owner pays actual cost over allowance, gets credit if under. Excessive allowances signal incomplete design.
TI Allowance Norms →
Retainage
Retainage Withhold
5–10% per state law
Owner withholds % of each progress payment until project completion. Many states allow reduction to 0-5% at substantial completion. Retainage practice varies by state — CA, NY, TX, FL each have specific statutory rules.
Reading Pay Apps →
Schedule Risk
Liquidated Damages (LDs)
$500–$5,000 per day typical
Pre-agreed daily damages owed by GC for missing substantial completion. Must reasonably reflect owner’s actual loss (not a penalty). Appropriate when project completion drives a hard revenue or operational date. Negotiate at GMP execution.
Risk Management →
Bonds & Insurance
Bonds & Insurance Coverage
1–3% of contract value
Builder’s risk, GL ($1M-$5M), umbrella, auto, workers comp, pollution, professional liability. Bonds: payment bond (subs/suppliers), performance bond (owner protection), bid bond (public work).
CFMA publishes industry norms.
Section 4 · Schedule & Procurement
Schedule, Procurement & Long-Lead Strategy
Lead times are now a budget item, not a schedule footnote. Switchgear at 24-52 weeks, transformers 26-52+ weeks, HVAC 16-40 weeks force long-lead procurement decisions at schematic design — not after permit. Full 2026 lead time guide.
Procurement
Long-Lead Equipment Release
Release at SD/DD, not CD
Long-lead items must be selected, priced, and released for fabrication during SD/DD — not after permit issuance. Switchgear, transformers, HVAC equipment, IMPs, refrigeration, and specialty kitchen drive most schedule risk.
TCG procurement service.
Scheduling
CPM Scheduling
Critical path management
Critical Path Method scheduling identifies the sequence of activities that controls overall project duration. Float, lag, and float consumption tracking. Updated monthly through construction. CPM discipline is what separates a project that hits dates from one that drifts.
Power of Sequencing →
Schedule Strategy
Fast-Track Construction
Overlap design + construction
Begin construction on early packages (foundation, structure) while design completes for later packages (finishes, FF&E). Compresses schedule 20-35% but increases coordination risk. Standard practice on design-build and CMAR delivery.
Design-Build →
Sub Selection
Subcontractor Buyout
Pre-qualify · 3-bid minimum
Subcontractor quality is the single biggest delivery risk on most commercial projects. Pre-qualify on financial strength, project-type experience, safety, and bonding. Three-bid minimum on major trades. Lowest sub bid alone routinely produces the worst trade outcome.
Bid Comparison →
Permit Strategy
Phased Permit & AHJ
Foundation · Shell · TI
Phased permit (foundation, shell, fit-out) accelerates construction start by 4-12 weeks on supportive jurisdictions. Permit timeline runs 6-26 weeks by jurisdiction.
Permit timeline by state.
Tools
AI-Powered Scheduling & Estimating
2-min estimate · Real-time data
The
TCG.ai estimator delivers market-calibrated cost estimates in under 2 minutes.
AI-powered scheduling compresses preconstruction timelines and improves schedule accuracy through real-time data integration.
Section 5 · Decision Frameworks
Five Binary Decisions Owners Have to Make
Five recurring binary decisions shape most commercial projects. The TCG verdict on each — based on a decade of project data across 38 states.
Design-Build vs Design-Bid-Build — Which delivery method?
Design-Build
Single contract. 15-25% schedule compression. 6-15% cost savings. Fewer disputes. Now ~50% of U.S. nonresidential.
Design-Bid-Build
Sequential. Competitive bid pricing. Standard on public work. Longer schedule, more designer-builder gaps.
TCG verdict: Design-build wins on private commercial 90% of the time. Choose DBB only for public projects where required by procurement rule, or where the owner has a strong existing architect relationship that predates the GC selection.
GMP vs Cost-Plus — Which contract structure?
GMP (Guaranteed Max Price)
Cost cap. Savings to owner. Best when scope is well-defined at GMP execution. Standard on DB and CMAR.
Cost-Plus / T&M
Actual cost plus fee. Owner carries cost risk. Best on complex, evolving, or emergency scopes where GMP would force premium contingency.
TCG verdict: GMP after preconstruction tightens scope is the right answer for 80% of commercial projects. Cost-plus fits emergency rebuild, highly complex healthcare/lab fit-out, or deeply evolving owner programs — paired with a target price and savings split to align incentives.
Engage GC at SD vs CD — When does the GC join the table?
GC at Schematic Design
15-25% schedule compression. Cost variance ~2%. Constructability captured at decision point. Standard for DB/CMAR.
GC at Construction Documents
Cost variance ~12%. Designer captures most decisions before constructability input. Drives RFI cycles and redesign loops.
TCG verdict: GC at SD wins every measurable metric. The only reason to delay GC engagement is if the project is so small or so standard (typical TI buildout under $500K) that preconstruction value is limited.
Early GC engagement.
Owner’s Rep vs Internal Project Manager — Who runs the project for the owner?
External Owner’s Rep
Outsourced advocate. Project-experience scaling. Independent of GC and architect. Pays for itself on most projects above $5M.
Internal PM
Cost-effective on continuous pipeline. Internal capability. Risk: PM is also running ops, lease management, or other roles.
TCG verdict: External owner’s rep on any project where the owner is not actively staffed for construction. Multi-site rollouts, cold storage, cannabis, data center, healthcare, and lease commencement projects warrant rep services regardless of size.
TCG owner’s rep.
OFCI vs CFCI — Owner-furnished or GC-procured equipment?
CFCI (GC-procured)
GC procures and installs. Single point of accountability for warranty and lead time. Default for envelope, structure, MEP, finishes.
OFCI (Owner-furnished)
Owner direct-purchases, GC installs. Better when owner has manufacturer relationships or standardization across multiple sites.
TCG verdict: CFCI for all envelope, structure, and base-building MEP. OFCI commonly for specialty production equipment (CNC, lab, medical imaging) where owner-controlled spec drives the buy. TCG’s direct manufacturer relationships deliver 15-35% savings on CFCI items.
Procurement guide.
Section 6 · Project Team
12 Roles on a Commercial Project — Who Does What
Twelve roles are on virtually every commercial project. Knowing what each owns — and where the boundaries are — prevents the most common project disputes. TCG team provides GC, design-build, owner’s rep, and CM services.
Owner
Decision Authority
Holds final decisions on scope, budget, schedule, and aesthetics. Pays the team. Carries financing.
Owner’s Representative
Owner Advocate
External advocate for the owner. Manages GC, designer, and vendors on owner’s behalf.
TCG owner’s rep.
Architect of Record (AOR)
Design Lead
Licensed architect responsible for design, code compliance, and contract administration. Stamps drawings.
MEP Engineer
Mechanical/Electrical/Plumbing
Design, code compliance, and energy compliance for HVAC, electrical, plumbing, and fire protection.
TCG MEP.
Structural Engineer
Structural Lead
Foundation, frame, lateral, and seismic design. Stamps structural drawings.
TCG structural.
General Contractor
Construction Lead
Construction execution, sub coordination, schedule, safety, quality. Holds GMP or cost-plus contract.
TCG GC.
Project Manager (GC)
Day-to-Day Lead
GC’s primary point of contact. Manages budget, schedule, RFIs, submittals, change orders, pay apps.
Superintendent
Field Lead
Daily site management. Sub coordination, safety, quality, daily reports. Drives schedule on the ground.
Subcontractors
Specialty Trades
Trade-specific construction. Civil, structural, envelope, MEP, finishes, FF&E. Hold subcontracts under GC.
Commissioning Agent (CxA)
Verification
Independent third party verifying systems perform as designed. Required for LEED and most code-driven Cx.
Specialty Consultants
Code & Systems
Civil, geotech, environmental, fire protection, accessibility, refrigeration, food service, lab planner.
AHJ & Inspectors
Code Authority
Authority Having Jurisdiction. Issues permits, conducts inspections, signs C of O. Building official, fire marshal, health.
Section 7 · Risk, Change & Closeout
Risk Management, Change Orders & Closeout
Risk events, change orders, and closeout management determine whether a project finishes on schedule, on budget, with the owner ready to operate. Six disciplines cover the work from mobilization through warranty turnover.
Change Management
Change Order Process
3–7% of contract = healthy
Every change documented, priced, scheduled, and signed before work proceeds. Three categories: owner-additive, unforeseen condition, design clarification. Above 10% of contract value signals scope was incomplete at GMP.
Risk Best Practices →
Risk Register
Risk Register & Mitigation
Updated monthly
Document of identified risks (cost, schedule, scope, performance, regulatory) with probability, impact, and mitigation plan. Reviewed monthly through construction. Top of the list typically: long-lead equipment, weather, site conditions, AHJ delays.
Risk Framework →
Safety
Safety Program & OSHA Compliance
OSHA 1926 · Site-specific plan
Daily JHA, weekly toolbox talks, monthly all-hands, third-party safety audits.
OSHA 1926 compliance. Steel, IMP, and roofing trades are the most safety-critical and require dedicated fall protection and rescue plans.
Punch & Closeout
Punch List & Substantial Completion
Substantial · Final Completion
Substantial completion: building is usable for intended purpose; punch list issued; retainage may be reduced; certificate of occupancy obtained. Final completion: punch complete, retainage released, warranty period begins.
Owner’s Rep at Punch →
Commissioning
Building Commissioning (Cx)
0.5–2% of construction value
Systematic verification that building systems perform as designed. Required by IECC and ASHRAE 90.1. LEED projects require Enhanced Commissioning. Cold storage, cannabis, healthcare, lab, and data center warrant Cx regardless of code triggers.
MEP Cx Coordination →
Final
Final Completion & Warranty
1-yr GC warranty · Mfr terms
Final completion releases retainage, transfers warranties (1-year GC standard, manufacturer-specific on equipment and roofing), turns over O&M manuals and as-builts. Owner takes operational control. The phase that — done well — sets the stage for a clean handoff.
CM Through Closeout →
Run a Better Project · Engage TCG at Schematic Design
The cost variance difference between engaging a GC at SD versus CD is roughly 12% to 2%. The schedule difference is 15-25%. Schedule a 30-minute call to talk through delivery method, contract structure, and team integration for your project.
FAQ
Common Questions About Process & Project Delivery
What are the 7 phases of a commercial construction project?▼
Programming → Schematic Design → Design Development → Construction Documents → Procurement → Construction → Closeout. Engaging the GC at schematic design compresses overall schedule 15-25% and reduces cost variance from ~12% to ~2% versus engaging at CD. TCG preconstruction.
What is design-build construction and how is it different from design-bid-build?▼
Design-build is a single-contract delivery method. Design-bid-build is sequential. Design-build delivers projects 30-40% faster with 6-15% cost savings and substantially fewer disputes. DBIA reports design-build now ~50% of U.S. nonresidential. Full DB guide.
What is GMP versus cost-plus contracting?▼
GMP caps cost — contractor commits to a not-to-exceed number; savings flow to owner. Cost-plus pays actual cost plus fee with no cap. GMP for well-defined scope; cost-plus for complex evolving scopes. Full comparison.
When should I hire an owner’s representative?▼
Any project above $5M, any multi-site rollout, any cold storage / cannabis / data center / healthcare project, or any developer-owner not actively staffed for construction management. The owner’s rep is the owner’s advocate at the table. TCG owner’s rep.
What is preconstruction and why is it critical?▼
Preconstruction is GC-led estimating, value engineering, scheduling, constructability review, and procurement strategy — running in parallel with design starting at SD. Prevents the most expensive failure: design without GC input, then bid out, then over budget by 15-30%. TCG precon.
What is the typical commercial construction schedule timeline?▼
TI 8-16 wk. QSR / coffee 14-26 wk. MOB (10-30K SF) 9-14 mo. Cold storage / industrial (50-200K SF) 10-16 mo. 3PL (200-500K SF) 12-18 mo. Data center 14-24 mo. Hospital 24-36+ mo. Lead times in 2026.
What is a contingency and how much should I carry?▼
Three layers: design contingency (5-10% during SD/DD), construction contingency (3-10% on GC line), owner’s contingency (5-10%). Carry 10-20% total at SD, 8-12% at GMP, 5-8% at start of construction. Cold storage, cannabis, healthcare warrant the higher end.
What are construction allowances and how do they work?▼
Allowances are placeholder dollar amounts in a contract for items not yet specified — flooring, casework, FF&E, signage. Owner pays actual cost over allowance, gets credit if under. Excessive use signals incomplete design at GMP execution. TI norms.
What is retainage in commercial construction?▼
Retainage is 5-10% of each progress payment withheld until completion. Many states allow reduction to 0-5% at substantial completion. CA, NY, TX, FL each have specific statutory rules. Reading pay apps.
What permits and approvals does a commercial project need?▼
Standard: zoning, site plan, building permit, MEP permits, fire protection, demolition (if applicable), C of O at completion. Specialty: USDA (food), state cannabis, FAA, wetlands, DOT access. Permit timelines 6-26 weeks by jurisdiction. Permit timeline by state.
What is a change order and how should it be managed?▼
A change order is a written modification to scope, price, schedule, or terms. Best practice: every change documented, priced, scheduled, signed before work proceeds. Healthy projects run COs at 3-7% of contract. Above 10% signals incomplete scope or shifting owner direction.
What is commissioning and when is it required?▼
Commissioning (Cx) verifies building systems perform as designed. Required by IECC and ASHRAE 90.1 for most commercial. LEED requires Enhanced Cx. Cold storage, cannabis, healthcare, lab, and data center warrant Cx regardless. Costs run 0.5-2% of construction.
What insurance and bonds does a commercial project need?▼
Builder’s risk, GL ($1M-$5M), umbrella, auto, workers comp, pollution, professional liability. Bonds: payment, performance, bid (public). Bonds typically 1-3% of contract value. Public almost always bonded; private above $5-$10M commonly bonded when lender or owner risk policy mandates.
Should I procure equipment directly or let the GC handle it?▼
CFCI (GC-procured) is default — single point of accountability. OFCI (owner-furnished) when owner has manufacturer relationships, multi-site standardization, or specialty equipment requiring owner spec control. TCG’s direct manufacturer relationships save 15-35% on CFCI. TCG procurement.
What does liquidated damages mean in a construction contract?▼
LDs are pre-agreed daily damages for missing substantial completion. Typical commercial LDs run $500-$5,000 per day. Must reasonably reflect owner’s actual loss (not a penalty). Negotiate at GMP execution, not after slippage.
How do I select the right GC for my project?▼
Five criteria: (1) project-type experience — 5+ of this exact building type in last 3 years; (2) bonding capacity — can bond your project plus 30% of pipeline; (3) financial strength — audited financials, dunning record, surety reference; (4) meet the actual PM and super; (5) cultural fit. Lowest bid alone produces the worst outcomes. GC selection guide.
Continue the Series
The Three Pillars of Commercial Construction
TCG’s pillar library is built around the three questions every commercial real estate developer, owner, or operator asks before a project breaks ground: what will it cost, what systems should I specify, and how do I actually run the project. Each pillar is a self-contained reference; together they form the complete owner’s playbook.
Pillar 1
Construction Costs
National cost benchmarks across 30+ commercial building types — cold storage, QSR, medical, data center, cannabis, self-storage, urgent care, retail, logistics — with regional variation across all 50 states and the soft-cost layers most owners miss.
What does it cost
Read the cost pillar
Pillar 2
Building Systems
The owner’s spec guide — IMP envelope chemistry, PEMB structural systems, MEP coordination, roofing assemblies, flooring systems, and the manufacturer relationships that determine lead time, cost, and performance for the life of the building.
How to spec it
Read the systems pillar
Pillar 3
Process & Delivery
The project playbook — design-build vs design-bid-build, GMP vs cost-plus, owner’s rep engagement, preconstruction discipline, the 7-phase project lifecycle, and the change-management frameworks that keep schedule and budget intact.
How to run it
Read the process pillar
Related Reading
Full Library — The Complete TCG Content Index
Every article and service page on terrapincg.com, organized by topic cluster. Each article links back to this pillar; cross-links between clusters help you navigate from process to systems to cost to financing and risk.
Sources & References
Industry Data, Standards, & Authority Citations
Service Area
Design-Build & Project Delivery Across All 50 States
