How to Plan a Tenant Improvement in Portland: 9 Steps From Lease to Opening

By Erik Tishenko, Modern Northwest · Published November 12, 2026

A smooth tenant improvement in Portland starts with the lease and the building's history, not the drawings. Settle who pays and who permits, get a budget and a schedule before you sign the construction contract, order the long-lead items early, and treat final inspections and move-in as phases of their own. Here are the nine steps, each shown on one of our own recent jobs in Portland, Beaverton, Hillsboro, Tigard, Lake Oswego and Salem.

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Most planning guides give you three tips and a phone number. This one walks the whole job in order, names the office that permits your address, and shows each step on a real job where our records can prove it. For the on-site dates themselves, read how long a tenant improvement takes. For the split of duties, read what a tenant improvement contractor handles.

Step 1. Read the lease before the drawings

Three things in the lease shape the job more than any finish choice. First, who pays: the tenant improvement allowance, when it is paid, and whether unspent money comes back to you. Second, where landlord work ends and tenant work begins. At Thirsty Caterpillar in Lake Oswego, the landlord work at Mercantile Village was its own contract on the same 3,790 square foot space, so two scopes ran on one floor plan. Third, the building rules: working hours, noise, deliveries, elevator use and parking for crews.

Those rules matter even on a small job. At Rosewood Dental, the work was a new pass-through glass window and a door into the point-of-sale office, about 100 square feet, and the crews worked off hours around the practice. If the lease or the landlord limits hours, the schedule has to be built from those hours, not from a normal week.

Step 2. Find out what the space was before

Before anyone draws a wall, learn the suite's last use and its permit history. If your use is different from the last one, you need a change of use permit, and in Portland you need it even when you build nothing. The new use can bring the space up to today's rules for accessibility, fire protection and seismic safety, which changes both the budget and the drawings.

Two of our jobs show the range. Uptown Family Dental in Beaverton turned an existing blood bank into a dental office, a different use with its own plumbing and medical equipment needs. Eastwood Apartments in Troutdale went from assisted living and memory care to multifamily housing, and it closed out with two certificates of occupancy, on December 5, 2025 and March 11, 2026. The Portland permit process also starts with the building's permit record, so an open permit or an unfinished inspection left by a past tenant shows up here, not on opening week.

Step 3. Walk the space with a builder before you commit

Bring the lease exhibit, the landlord's criteria and any plans the landlord has. A walkthrough with a tenant improvement contractor at this point turns the lease language into a list of real conditions: where the water and power enter, what the ceiling hides, whether the restrooms meet today's rules, and what the demising walls are made of. At Modern Northwest the walkthrough is free, and a budget and a schedule come before you sign anything. Ask one question of every date on that schedule: who does it depend on, the city, the landlord, a supplier, or us.

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Step 4. Decide who draws it

Design is a phase with its own clock. Block Renovation's 2026 planning guide puts it at 4 to 10 weeks, before any permit review starts. You can hire an architect and bid the drawings, or have one team design and build; our design-build comparison lays out the trade. Either way, the city will not accept an application that is not complete, so the construction documents have to answer the reviewer's questions before they go in, not after.

Step 5. Know your permit office and its clock

"Portland" on a mailing address does not tell you who permits the suite. The office depends on whether the address is inside city limits, inside another city, or in unincorporated county land. Each office runs its own system and publishes its own review times.

Plan for the parts of the permit that arrive later, too. On the Orenco Family Medicine job in Hillsboro, the fire sprinklers, the HVAC and the fire alarm each went through as deferred submittals, and in late October 2025 the job waited on the electrical, fire and mechanical permits with no crews on site on some days. A deferred submittal is normal; a schedule that pretends it is not is the problem. Our guide on who pulls the permits covers who applies for each one.

Step 6. Order the long-lead items and name who supplies what

Every job has a few items that set the finish date more than the framing does. At Frank's Noodle House in the Pearl District, the scope included all new flooring, lighting, counters, tables, kitchen equipment and walk-in coolers, with the permit issued in December 2024 and the city final in March 2025. At the Animal Care Center clinic in Salem, the rough-ins included HVAC, fire sprinklers, plumbing and medical gas. Equipment like that is placed from cut sheets, so the order date belongs in the schedule next to the rough-in date. Write down which items the owner supplies, and read our note on change orders before you swap any of them after the walls close.

Step 7. Build in sequence and keep the inspections in order

Once the permit is issued the work runs in a fixed order: demolition, framing, the mechanical, electrical and plumbing rough-ins, the inspections that have to pass before anything is covered, then insulation, drywall, ceilings and finishes. Product approvals run alongside; shop drawings and submittals for casework, storefront and equipment need an answer before those trades can start. One project manager runs the job from the first day to the last inspection, which is how a question from the field gets an answer the same day instead of the same week.

Step 8. Treat final inspections as a phase

Owners tend to picture one final inspection on one afternoon. On our jobs it is a run of them. At the Animal Care Center in Salem the finals opened with the fire sprinklers on April 16, 2026, the final building inspection passed on April 30, and the final fire inspection closed the job on June 1. At Ivybrook Academy in Tigard the run went from the duct damper test on May 7, 2026 to the low-voltage fire final on May 18. Orenco Family Medicine got its occupancy approval on January 20, 2026. Set your opening date after the last final on the inspection card, and read what a certificate of occupancy requires in your county.

Step 9. Plan the move-in as its own phase

After the last inspection you still have furniture, equipment start-up, signs, phones and network, staff training and your own stocking. None of that is in the construction schedule, and all of it lands between the contractor's last day and your first customer. Put a date on each one, and know the difference between substantial completion, when you can use the space, and the day the punch list is finished.

Ten questions to settle before you sign

Bring these to the lease negotiation and to the walkthrough. Each one can cost a tenant a month of rent on an empty suite.

1. Which parts of the work are landlord work, and is that a separate contract on the same space?
2. How much allowance is in the lease, when is it paid, and what happens to money you do not spend?
3. Does the landlord sign off on the drawings, and how many days does that review take?
4. What hours can crews work, where do deliveries land, and is there an elevator or a loading dock?
5. What was the space used for before, and does the new use change its occupancy?
6. Are there open permits or unfinished inspections on the suite from a past tenant?
7. Which office permits the address, and does the suite sit inside or outside city limits?
8. Which items will you supply yourself (equipment, casework, signs), and when do they arrive?
9. Which parts of the permit will come in later as deferred submittals, and who tracks them?
10. What is the last inspection on the list, and is your opening date after it?

Frequently asked questions

The bottom line

Plan a Portland tenant improvement from the outside in: lease, building history, permit office, long-lead items, then the build, the finals and the move-in. Modern Northwest is a commercial general contractor in Portland at 19140 NE Portal Way, licensed in Oregon (CCB #198582) and registered in Washington (MODERNI888R7) since 2012, building office build-outs, dental offices, clinics, restaurants and retail suites across the Portland metro and Southwest Washington. Call (360) 326-2747 or book a walkthrough, and you get the budget and the schedule before you commit.