What Does a Tenant Improvement Architect Do?
A tenant improvement architect designs the build-out of leased commercial space: reconfiguring an existing shell or previously occupied suite into something that works for a specific business. The scope typically covers space planning, code and occupancy analysis, construction documents, permit submittal, consultant coordination, and construction administration.
The decision most businesses get wrong is timing. Most bring in an architect after the lease is signed. The firms that avoid expensive surprises bring one in during lease negotiation, while the terms can still change.
Why the Architect Belongs in the Lease Conversation
A landlord’s letter of intent will describe a space in leasable square feet. It will not tell you whether that space can legally support what you want to do in it.
Before signing, an architect can establish:
Whether your use is permitted. Zoning determines what activities are allowed at an address. A space zoned for general retail may not accommodate a commercial kitchen, a medical clinic, or an assembly use without a change that triggers substantially more review.
Whether the occupancy classification changes. Moving a space from Business use to Assembly, or from Mercantile to a medical occupancy, triggers code requirements that are frequently the largest single line item in a build-out: egress capacity, fire separation, sprinklers, accessible route upgrades, and restroom fixture counts calculated on the new occupant load.
What the shell actually delivers. “Warm shell” and “cold shell” mean different things to different landlords. Whether the space arrives with distributed HVAC, an electrical service adequate to your load, a fire sprinkler grid, and finished restrooms determines a large share of your build-out cost.
Whether accessibility upgrades get triggered. Alterations to existing buildings can require bringing the path of travel, restrooms, and entrances into current accessibility compliance. On an older building, this cost is real and it is not obvious from a walkthrough.
What the tenant improvement allowance actually covers. The allowance is a negotiated number. Knowing your likely build-out cost before you negotiate it is worth more than any concession you will win afterward.
A feasibility study at this stage costs a fraction of what discovering the same issues after lease execution costs. At that point your rent clock is running and your leverage is gone.
How Seattle Permitting Works for Tenant Improvements
Commercial alterations in Seattle are reviewed by the Seattle Department of Construction and Inspections. Bainbridge Island, Kitsap County, and each Eastside city run their own processes with their own requirements and timelines, which is why a firm’s familiarity with your specific jurisdiction matters more than its general credentials.
Broadly, tenant improvements fall into tiers:
| Scope | Typical review path |
|---|---|
| Cosmetic work, no structural or system change | Often minimal or no permit |
| Non-structural alterations, same occupancy | Standard building permit review |
| Change of occupancy classification | Building permit with expanded life safety and accessibility review |
| Work affecting structure, egress, or exterior envelope | Longer review, may require additional disciplines |
| Work in a historic district or landmark structure | Adds design review by the applicable board |
Confirm current review timelines and submittal requirements directly with the jurisdiction before committing to a schedule. Permit turnaround in the region has been volatile.
What Drives Tenant Improvement Cost
Occupancy change. The largest single swing factor. A change that increases occupant load or introduces assembly, institutional, or hazardous use brings egress, fire separation, and fixture count requirements that a same-use build-out avoids entirely.
Mechanical and electrical capacity. If the existing service cannot support your equipment load, you are into utility coordination and possibly a service upgrade. Restaurants and medical clinics run into this constantly.
Kitchen and specialty ventilation. Commercial kitchen exhaust, makeup air, and grease interceptors are a distinct cost category with their own review path.
Structural work. Cutting a new opening, adding rooftop mechanical units, or hanging significant loads pulls in a structural engineer and extends review.
Building age. Older buildings carry more unknowns behind the walls and more triggered upgrades. Seismic requirements for certain existing building types add another layer.
Finish level. The most visible cost and usually not the largest one.
Sector Differences Worth Knowing
Restaurant and Food Service
Health department review runs parallel to building permit review. Kitchen ventilation, floor and wall finish requirements, grease interception, and restroom fixture counts are all regulated separately from the building code path. Assembly occupancy classification frequently applies and drives egress design.
Medical and Dental
Occupancy classification depends on the procedures performed and whether patients are capable of self-preservation. That distinction changes the applicable code requirements substantially. Equipment loads, imaging shielding, medical gas, and infection control considerations shape the design from the first sketch.
Office and Workplace
Generally the most straightforward path, with occupant load, egress, and accessibility as the governing constraints. Density assumptions in the lease should be checked against what the egress capacity actually supports.
Retail
Storefront modifications may trigger design review depending on the district. Accessibility at the entry and within the sales floor is a standard scope item on older buildings.
How to Evaluate a Tenant Improvement Architect
Recent permits in your jurisdiction. Not “we work throughout the Puget Sound region.” Ask which specific projects, in which cities, in the last two years, and how review went.
Experience with your occupancy type. A firm with a strong office portfolio is not automatically prepared for a commercial kitchen or a clinic. The code paths are genuinely different.
A stated position on construction administration. Ask how many site visits are included and who fields contractor questions. On a build-out where the schedule is tied to a rent commencement date, response time in the field is not a soft factor.
Willingness to engage before the lease is signed. A firm that only wants to start after execution is a firm that will not save you from the lease terms.
Direct references from tenants, not landlords. Different incentives.
About Coates Design
Coates Design Architects has designed commercial, civic, healthcare, and retail projects throughout the Puget Sound region, including the Eagle Harbor Market Building, the Granero Office Building, the Tanner Office Building, and healthcare work at Harrison Medical Center. The firm works across Seattle, Bainbridge Island, and Kitsap County jurisdictions and is led by Matthew Coates, AIA.
If you are evaluating a space or negotiating a lease, a feasibility study before you sign is the highest-leverage step available to you. Get in touch.
Frequently Asked Questions
Do I need an architect for a tenant improvement in Seattle?
Washington requires a licensed architect’s stamp for most commercial permit submittals, and the threshold is low. Even where a stamp is not strictly required, code analysis and occupancy classification are where tenant improvement budgets are made or lost.
How long does a commercial tenant improvement take?
Design and permitting generally take longer than construction on a straightforward build-out. Timelines vary significantly by jurisdiction, occupancy change, and current review backlog. Get a schedule estimate specific to your address and scope rather than relying on general figures.
What is a change of use permit?
A permit required when the occupancy classification of a space changes, for example converting retail space to a restaurant or a clinic. It triggers review against the requirements for the new classification, including egress, fire protection, accessibility, and plumbing fixture counts.
Should I hire an architect before or after signing the lease?
Before. Zoning suitability, occupancy classification, shell condition, and triggered upgrades are all determinable in advance, and all of them are negotiable terms until you sign.
What is the difference between a cold shell and a warm shell?
The terms are not standardized and vary by lease. A cold shell generally means an unfinished space with minimal distributed systems. A warm shell generally includes some combination of HVAC distribution, electrical service, restrooms, and finished ceilings. Confirm what is actually included in writing.