How Long Does It Take to Build an Apartment Complex? Real Timelines for San Diego Projects

According to the National Association of Home Builders, the average multifamily building took 19.6 months to complete in 2024 after receiving authorization — and that number climbs to 22.1 months for buildings with 20 or more units. In the West region, which includes California, the average is 19.9 months. Those figures are useful benchmarks, but they don’t tell the full story of what a ground-up apartment project actually looks like on a timeline. The preconstruction phase, entitlements, and permitting add months before a single footing is poured.

The Baseline: National Apartment Construction Timelines

The NAHB data covers the construction phase only — from permit authorization to certificate of occupancy. It doesn’t include land acquisition, entitlement processing, design, or the time to lease up and stabilize the asset. When developers ask how long it takes to build an apartment complex, they usually mean the entire development cycle, not just the stick-and-concrete phase.

Total development timelines for ground-up multifamily — from site control to CO — typically run 36 to 60 months depending on project scale, market, and product type. A 50-unit garden-style project in a non-coastal San Diego submarket might close in 30 months. A 150-unit urban infill podium project in a coastal zone could run 48 to 60 months. These aren’t failure stories. They’re the realistic expectations any proforma should reflect. Inabnet’s multifamily general contracting work spans all three product types across San Diego.

What San Diego Adds to the Clock

San Diego has some of the most complex permitting conditions in California. The City’s Development Services Department processes permits across multiple tracks — standard, express, and fast-track — but for ground-up multifamily requiring environmental review under CEQA, discretionary approvals, or Coastal Development Permits, the entitlement process alone can run 12 to 24 months before construction documents are even complete.

Recent reforms have improved processing speeds in some categories. The City of San Diego data shows 61% of permits processing within one week for straightforward projects, and AB 462’s streamlined coastal ADU review reduced certain timelines significantly beginning in late 2025. But complex ground-up multifamily projects — particularly those requiring Design Review Board approval, historic review, or Coastal Commission coordination — still require 6 to 18 months of entitlement work before a building permit application even enters plan check. Budget this time into your proforma from day one.

Phase by Phase: Where the Time Actually Goes

Breaking down a San Diego ground-up multifamily project by phase gives developers a clearer picture of where time is spent and where delays actually occur:

• Site Control and Due Diligence: 30 to 90 days. Feasibility analysis, title review, Phase I environmental, zoning confirmation.
• Entitlements and Discretionary Approvals: 6 to 24 months depending on project complexity and whether CEQA review is required. This is the most variable phase and the one developers most often underestimate.
• Design and Construction Documents: 4 to 9 months, ideally overlapping with entitlements to compress the overall schedule.
• Building Permit Plan Check: 3 to 6 months for ground-up multifamily. Express plan check accelerates this for eligible projects.
• Construction: 14 to 24 months depending on product type, unit count, and site conditions. See below for product-specific ranges.
• Close-Out, Inspections, and CO: 30 to 90 days after substantial completion.

The design and entitlement phases are where preconstruction engagement pays off. Bringing a GC in early allows cost modeling and constructability input to run parallel to design — compressing the total schedule rather than waiting for 100% CDs before GC involvement begins. See our article on what preconstruction actually delivers for a detailed breakdown of that phase.

Product Type Affects Construction Duration

Not all multifamily construction is the same. Product type has a direct impact on construction duration:

• Garden-Style (2–3 stories, surface parking): 12 to 16 months construction. Simpler framing, no podium, fewer structural complexities. Fastest to build of the standard multifamily types.
• Wood-Frame Podium (4–8 stories, concrete podium with wood-frame above): 16 to 22 months construction. The podium level adds concrete form work and extended cycle time before wood framing begins. Our breakdown of wood-frame podium construction pros and cons covers what this structure type requires in detail.
• Urban Infill / Concrete Construction: 22 to 36 months construction. Concrete or steel construction, tight urban sites, complex logistics. The longest construction cycle of the common multifamily types.

What Compresses — or Blows — a Multifamily Schedule

The biggest schedule killers in San Diego ground-up multifamily are not construction problems. They’re preconstruction problems that surface during construction: unresolved design coordination between structural, MEP, and architectural, subcontractor availability gaps, late owner decisions on unit mix or finishes, and unforeseen soil conditions not identified in the geotechnical investigation.

Change orders are the clearest symptom of a preconstruction phase that didn’t go deep enough. Each change order costs time as well as money — the schedule impact often exceeds the cost impact when construction loan interest is factored in. Our breakdown of how to prevent change orders in multifamily construction is directly relevant here.

How Preconstruction Keeps Your Timeline Intact

A GC who participates in preconstruction — cost modeling, constructability review, subcontractor pre-qualification, and buyout strategy — compresses the construction phase by resolving problems before they become field delays. The time invested in a well-run preconstruction phase consistently returns more schedule savings during construction than it costs upfront.

The progressive GMP structure that Inabnet typically recommends is designed exactly for this: GC involvement from early design, with cost modeling running in parallel to CD development, so the project hits building permit plan check with a locked scope, a competitive buyout, and a trade partner list ready to mobilize. The 2026 San Diego cost-per-unit data covers how these schedule decisions affect the budget per door.

Managing Your Construction Loan Against the Schedule

Lenders fund ground-up multifamily construction through draw schedules tied to construction milestones. A project that runs behind schedule draws interest longer against a loan that isn’t fully deployed yet — meaning carry costs compound the impact of every delay. Understanding the construction timeline before closing on your construction loan isn’t optional. It’s a requirement for structuring a loan with the right term and extension provisions. Inabnet’s San Diego project experience includes working closely with lenders and owners on draw schedules that match realistic field progress.

Frequently Asked Questions

How long does it take to build a 50-unit apartment complex in San Diego?

For a 50-unit wood-frame podium project in a non-coastal San Diego submarket, a reasonable total development timeline is 30 to 42 months from site control to certificate of occupancy. This includes approximately 12 to 18 months for entitlements and permitting, 6 to 9 months for design and plan check overlap, and 16 to 20 months of construction. Coastal projects or those requiring CEQA review can run 6 to 12 months longer.

What is the fastest way to build a multifamily apartment project?

Garden-style construction (2–3 stories, no podium) is the fastest product type, typically completing in 12 to 16 construction months. Combining a fast-track permitting strategy — using AB 2011, ministerial approval where applicable, and express plan check — with a strong preconstruction phase and an early GMP buyout produces the tightest total schedules. Site complexity and ground conditions are the variables most likely to compress or extend this range.

Why do multifamily construction timelines vary so much?

Timeline variation comes from four primary sources: product type (garden-style is faster than podium or concrete), site complexity (infill urban sites take longer than surface lots), entitlement requirements (discretionary review and CEQA add months), and preconstruction quality (a well-run preconstruction phase prevents field delays). The national NAHB average of 19.6 months covers only the permitted construction phase — total development timelines are typically 12 to 24 months longer than that figure suggests.

Does hiring a multifamily-only GC affect the construction timeline?

Yes, in a meaningful way. A GC whose entire subcontractor network, estimating process, and field supervision experience is built around multifamily construction — rather than adapted from commercial or single-family work — produces tighter schedules because the team already knows the sequencing, the common problem points, and the trade coordination requirements specific to apartment construction. That expertise is most visible in the framing, MEP rough-in, and unit finish phases where sequencing errors create the most schedule risk.

Sources

• National Association of Home Builders (Eye on Housing) — Q1 2026 Multifamily Construction Data
• Multifamily Dive — Average Apartment Construction Time Fell in 2024
• City of San Diego — Permit Processing Timeline