A tenant improvement is a race against a lease clock. Every week between lease signing and opening day is rent you pay on a space that earns nothing, and the difference between a TI that opens on schedule and one that drags for months is rarely construction speed. It is how early the design, permit, and landlord questions were answered. Green O runs commercial buildouts across Beaverton and the west metro under a commercial CCB endorsement, and this is the playbook we walk every business owner through before demolition starts, whether the space is a clinic, a restaurant shell, an office, or retail.
1. Read the lease like a construction document
Before drawings, the lease. The work letter and exhibits decide most of your budget: what the landlord delivers (cold shell, warm shell, or second-generation space), what the TI allowance covers and when it is paid out, who owns permit responsibility, required contractor approvals and insurance limits, hours-of-work rules, and restoration obligations at lease end. Two leases for identical suites can produce wildly different project costs. Bring your GC into the lease review; it is the cheapest consulting you will ever get, because the time to negotiate HVAC condition or allowance draw terms is before signature, not during framing.
2. Design and the change-of-use trap
Commercial work in Oregon runs under the Oregon Structural Specialty Code, and the single biggest early question is occupancy classification. Keeping the same use as the prior tenant, office to office, keeps review simple. Changing use, retail to restaurant, office to medical clinic, warehouse to fitness, can trigger requirements the space was never built for: added plumbing fixture counts, grease interceptors, mechanical upgrades, structural loads, fire separations, and accessibility upgrades. Oregon adopts accessibility standards consistent with the ADA, and alterations trigger accessible-route and restroom obligations that must be designed in, not discovered at inspection. A GC who flags a change-of-use issue in week one saves you a redesign in month three.
3. Permits in Beaverton: what to expect
- Plan submittal to the City of Beaverton building division with architectural, structural (if touched), mechanical, electrical, and plumbing drawings.
- Plan review, typically several weeks for straightforward TIs, longer for change-of-use, restaurants, and medical. Corrections cycles are normal; answer them fast.
- Trade permits pulled by licensed commercial subcontractors.
- Health and specialty reviews where applicable: county health for food service, fire marshal review for assembly and sprinkler changes.
- Inspections through occupancy, ending in the certificate of occupancy. Your open date is the CO date, and your GC's schedule should be built backward from it.
4. A realistic TI timeline
For a standard office or retail TI in the west metro: two to four weeks of space planning and pricing, four to eight weeks of construction documents and plan review running partly in parallel, six to twelve weeks of construction, then final inspections and punch. Call it four to six months, lease to keys, for a normal project, longer for restaurants and clinics. The compressible part is not the construction; it is the front end. Long-lead items, HVAC units, electrical gear, storefront glass, custom millwork, should be ordered the day permits look certain, not the day walls are framed.
5. The pitfalls that stall Beaverton buildouts
- Discovering the shell's real condition late. Undersized electrical service, tired rooftop units, and non-compliant restrooms hide in second-generation spaces. Walk the space with your GC before lease signature.
- Allowance mechanics. TI allowances usually reimburse after paid invoices and lien releases; someone has to float the cash. Plan the draw schedule with your lender and landlord up front.
- Change-of-use surprises, covered above, the most expensive category on this list.
- Slow decisions on finishes. A TI schedule has no slack for three weeks of tile deliberation. Lock selections before construction starts.
- The wrong contractor category. Oregon licenses commercial work separately; verify the commercial endorsement at ccb.state.or.us, and apply the rest of our contractor vetting checklist.
Our commercial team's scope, delivery method, and past projects live on the tenant improvement page and the broader commercial services page. If you are holding a lease, or about to sign one, and the buildout clock is already ticking in your head, would a walkthrough of the space with a commercial GC help you price reality before the design money is spent? We do free TI walkthroughs across Beaverton and the west metro with a written scope-and-risk read within 24 hours.
A note on delivery method, because it changes your risk profile: a negotiated design-build arrangement, where the GC is at the table during design, catches shell problems and change-of-use issues while they are still cheap to solve, while a hard-bid arrangement on finished drawings can look cheaper on paper and then give the savings back through change orders when the drawings meet the real building. For first-time tenants on a lease clock, we will say plainly that early contractor involvement is the single highest-leverage decision in the whole project.
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