Sunny Drafting & Design
More than 70% of commercial tenant improvement permit applications in the Bay Area get kicked back on the first submission — and the reason is almost always incomplete drawings. If you're planning a commercial buildout, understanding exactly what commercial tenant improvement drawings Bay Area landlords and city offices require keeps your project on schedule and your costs predictable. Our commercial tenant improvement drafting service helps Bay Area tenants assemble the right drawing set from day one.
Your landlord isn't just being cautious when they require a full drawing set. They're protecting their building's structure, its base systems, and their own liability. The city has its own checklist on top of that. These two sets of requirements overlap — but they're not identical. You need to satisfy both before a single wall goes up.
This guide breaks down which spaces need TI drawings, what a complete set contains, what Bay Area landlords specifically look for, how to speed up approval, and the mistakes that cause the most rejections.
Contents
Spaces That Require Commercial TI Drawings
Standard Business Occupancies
Most Bay Area tenants assume TI drawings are only for major renovations. That's not accurate. Any physical change to a leased commercial space — adding a partition wall, moving plumbing, upgrading electrical panels — typically triggers a permit requirement and therefore a drawing requirement.
Retail stores, office suites, and general commercial tenants deal with the least complex drawing sets. But "least complex" still means a substantial package. You'll need at minimum:
- A floor plan showing existing and proposed layouts
- A reflected ceiling plan (lights, HVAC diffusers, sprinkler heads)
- An electrical plan with a panel schedule
- A plumbing plan if you're adding or moving fixtures
- Exit paths and occupancy load calculations
Even a straightforward office buildout in San Jose or Oakland requires all of these. Skipping any one of them delays your permit. For a breakdown of what a standard permit package looks like across project types, see what's included in a Bay Area permit set — many of the same sheet types apply directly to commercial TI work.
High-Scrutiny Uses: Food, Medical, and Childcare
Some business types face additional layers of review. Restaurants need health department approval on top of building permits. Medical offices trigger ADA (Americans with Disabilities Act) path-of-travel upgrade requirements and often require structural coordination. Childcare facilities have specific egress and ventilation rules under the California Building Code.
If you're opening a restaurant, the drawing requirements go well beyond a standard commercial buildout. Our guide to Bay Area restaurant tenant improvements covers the full scope of what that drawing set includes and why health department sign-off adds another review layer.
What a Complete TI Drawing Set Contains
The Baseline Sheets Every TI Needs
Regardless of space type, every commercial TI drawing package includes a core set of sheets. Think of these as the non-negotiable minimum for any Bay Area city submittal:
| Sheet Type | What It Shows | Required For |
|---|---|---|
| Floor Plan (Existing & Proposed) | Walls, doors, fixture locations, dimensions | All TI projects |
| Reflected Ceiling Plan | Lighting layout, HVAC diffusers, sprinkler heads | All TI projects |
| Electrical Plan & Panel Schedule | Circuit layout, load calculations, panel updates | All TI projects |
| Plumbing Plan | Fixture locations, drain lines, water supply | When plumbing is modified |
| Mechanical / HVAC Plan | Duct layout, equipment schedules, ventilation | When HVAC is modified |
| Life Safety Plan | Exits, occupancy loads, fire extinguisher locations | All TI projects |
| Title 24 Energy Compliance | Lighting power density, HVAC efficiency, controls | All California TI projects |
| ADA Accessibility Plan | Path of travel, restroom compliance, signage | When path of travel is affected |
Complex Spaces Need More
A basic office buildout runs 6–8 sheets. A restaurant or medical clinic easily runs 15–25 sheets. The added complexity comes from MEP (mechanical, electrical, and plumbing) coordination, specialized equipment layouts, and detailed code compliance documentation.
California's Title 24 requirements apply to commercial interiors — not just residential projects. Your drawings need to demonstrate lighting power density compliance and HVAC efficiency. Our guide to Title 24 lighting requirements for commercial interiors explains exactly what those calculations need to show to pass energy compliance review.
Commercial Tenant Improvement Drawings Your Bay Area Landlord Reviews
The Landlord Review Process
Your landlord's approval is separate from the city's permit. Most Bay Area commercial leases include a tenant improvement provision requiring landlord sign-off before you submit to the city. Landlords typically want:
- Architectural drawings stamped by a licensed architect or engineer
- Written confirmation that structural systems won't be modified without a structural engineering review
- Confirmation of no changes to base building MEP systems beyond the agreed lease scope
- A construction schedule and your contractor's license numbers
- Proof of contractor insurance naming the landlord as an additional insured
Some landlords in San Francisco and the South Bay require your drawings to go through their own architect for review — an added cost that tenants often don't budget for. Ask about this before you hire your drafter, not after.
City-by-City Differences Across the Bay Area
Different cities have different submittal requirements, timelines, and fee structures. Knowing your jurisdiction before you start drawings matters. San Francisco's Department of Building Inspection is among the most demanding in the region. San Jose, Oakland, and smaller East Bay cities each have their own workflows and plan check turnaround times.
The table in the chart above shows representative timelines. Plan accordingly — a 10-week permit review in San Francisco means your contractor shouldn't be idle on standby for two months.
Strategies That Speed Up Approval
Coordinate Before You Draw
The single biggest time-saver is pre-application coordination. Contact the city's building department before you start drawings. Many Bay Area cities offer pre-application meetings where a plan checker reviews your project scope and flags issues before you spend money on a full drawing set.
Talk to your landlord's property manager before hiring anyone. Ask specifically:
- What drawing format do they require — PDF, AutoCAD DWG, or both?
- Do they require a licensed architect's wet stamp or digital stamp?
- Who reviews drawings on their end, and what's their turnaround time?
- Are there base building standards your design must match?
Getting clear answers to these questions before drawings start saves weeks. For the full picture of how TI submittals fit into the permitting sequence, our step-by-step guide to pulling a Bay Area building permit walks through the process from pre-app to final inspection.
Build the Right Team
Your drafter, contractor, and MEP engineers need to communicate with each other — not just with you. Drawings that don't coordinate between disciplines are the leading cause of plan check correction letters. A single conflict between a duct run and a sprinkler line can send your drawings back for a second or third review cycle.
Budget for the full team early. Understanding what drafting and engineering fees look like across different project types helps you plan without surprises. Our breakdown of commercial tenant improvement costs in the Bay Area covers drafting fees, engineering coordination, permit fees, and what to expect from contractors.
Drawing Mistakes That Get TI Permits Rejected
Missing Code Compliance Documentation
The most common rejection reason is missing ADA compliance documentation. If your buildout changes the path of travel to restrooms, exits, or parking, you're required to bring those elements up to current ADA standards. Many tenants don't realize this applies even when they're only renovating the interior of their leased space — it's triggered by the scope of work, not the location of the work.
Other frequently missing items that cause rejections:
- No occupancy load calculation printed on the floor plan
- Missing fire sprinkler modification notes when new walls divide a space
- Incomplete or absent reflected ceiling plan
- Title 24 energy compliance left unaddressed
- No sheet index or code analysis on the cover sheet
Our ADA compliance checklist for Bay Area commercial spaces is a practical reference to run through before your first submittal.
Coordination Failures Between Trades
Even when individual sheets look complete, drawings get rejected because the trades didn't coordinate. A wall on the architectural plan conflicts with a duct location on the mechanical plan. A lighting layout doesn't match the electrical panel schedule. These are called "correction items" in plan check, and each one restarts your review clock.
The fix is straightforward: have one person review all sheets together before submission. That's ideally your architect of record or lead drafter. Don't let your contractor submit drawings assembled from multiple consultants without a final coordination pass. It costs a fraction of what a second plan check submittal does in both time and fees.
Frequently Asked Questions
Most Bay Area landlords require stamped architectural drawings showing the existing and proposed floor plan, reflected ceiling plan, and confirmation that structural and base building systems won't be altered beyond the agreed lease scope. Some landlords also require their own architect to review your drawings before you submit to the city.
For most commercial TI projects in California, yes. The California Architects Practice Act requires that drawings for commercial structures be prepared or reviewed by a licensed architect or engineer. Many Bay Area landlords require a stamp as a lease condition, independent of what the city requires.
It depends heavily on the city and project complexity. San Francisco typically takes 8–12 weeks for a first-submittal review. San Jose and Oakland run 4–8 weeks for straightforward projects. Smaller cities like Fremont or Pleasanton often process simple TIs in 3–6 weeks. Correction letters and resubmittals add time to any timeline.
A standard set includes a cover sheet with code analysis, existing and proposed floor plans, reflected ceiling plan, electrical plan and panel schedule, plumbing plan (if applicable), mechanical/HVAC plan (if modified), life safety plan with occupancy loads and exits, ADA compliance documentation, and Title 24 energy calculations.
Yes, if your buildout costs exceed a certain threshold or changes the path of travel to restrooms, exits, or the building entrance. California requires that up to 20% of the project construction cost be spent on ADA path-of-travel improvements when a permit is pulled. This applies even if the ADA deficiencies exist in areas outside your leased space.
No. Starting work without an issued permit exposes you to stop-work orders, fines, and potential requirements to demolish and redo work for inspection. Some cities allow demo or site prep to begin under a separate demolition permit while the TI permit is in review — check with your specific jurisdiction before proceeding.
The building inspector will flag the discrepancies during final inspection and withhold your certificate of occupancy. You'll need to either restore the work to match the approved drawings or submit revised drawings and go through plan check again. Both options are costly and delay your opening, so built-to-plan construction is always the goal.
Key Takeaways
- Your TI drawing set must satisfy both your landlord's lease requirements and the city's permit requirements — these are two separate checklists and you need to clear both.
- Complex spaces like restaurants and medical offices require significantly more sheets than a standard office buildout, and they involve additional agency reviews beyond the building department.
- Pre-application coordination with your landlord and the local building department before drawings start is the most cost-effective step you can take to prevent resubmittals.
- Missing ADA path-of-travel documentation and poor inter-trade coordination are the two leading causes of plan check rejection across all Bay Area jurisdictions.
