A tenant improvement, or TI, is the construction work needed to prepare a commercial space for a specific business or tenant. This can include new walls, flooring, lighting, restrooms, ceilings, cabinetry, paint, doors, storefront changes, HVAC adjustments, electrical upgrades, plumbing, accessibility improvements, and finish selections. Tenant improvements are common for offices, retail spaces, restaurants, medical offices, fitness studios, and other commercial spaces that need to be customized before opening.

The timeline depends on the size of the space, permit requirements, design complexity, material lead times, and how much mechanical, electrical, plumbing, or structural work is involved. A straightforward office or retail build-out may take 8–16 weeks of construction once plans, permits, and materials are ready. More complex projects, such as restaurants, medical offices, fitness centers, or spaces with major utility upgrades, can take 3–6 months or longer. Envision Builders helps clients plan early so permitting, procurement, landlord coordination, inspections, and opening-day deadlines are built into the schedule.

Tenant improvement costs are usually negotiated in the lease. In some cases, the landlord provides a tenant improvement allowance, which gives the tenant a set amount of money to apply toward the build-out. In other cases, the tenant pays for some or all of the improvements directly. The final responsibility depends on the lease terms, the condition of the existing space, the type of business moving in, and whether the improvements add long-term value to the property. Envision Builders can work with tenants, landlords, brokers, and property managers to define scope, budget, and construction priorities before work begins.

In many cases, yes. Commercial tenant improvements in Seattle often require permits, especially when the project includes new walls, changes to occupancy or use, electrical work, plumbing, mechanical/HVAC work, fire/life-safety systems, accessibility upgrades, structural changes, or exterior modifications. Minor cosmetic updates may not require the same level of review, but it is important to confirm requirements before starting work. Envision Builders helps clients identify likely permitting needs early and coordinate with the design team, landlord, and city review process.

Seattle SDCI states that remodels or additions to commercial buildings generally require a construction permit, and its permitting guidance also notes that tenant improvements to multifamily or commercial buildings typically require plan review unless the work is very minor and qualifies for a subject-to-field-inspection path.

Yes. Envision Builders works with tenants, building owners, landlords, property managers, brokers, and business owners. For tenants, we help turn a leased space into a functional, code-compliant, brand-aligned workplace or customer-facing environment. For property owners and landlords, we help improve commercial spaces, prepare suites for future tenants, coordinate building upgrades, and protect long-term asset value. Our goal is to keep the project organized from early budgeting through construction, inspections, and turnover.