Cornelius, Oregon, is a city in Washington County located along Tualatin Valley Highway between Hillsboro to the east and Forest Grove to the west, with a 2020 census population of 12,694 and an estimated 2026 population of approximately 16,647. With a population density of approximately 5,920 people per square mile across just 2.01 square miles, Cornelius has the fourth-highest population density in Oregon, making it one of the most compact and densely developed communities in the state. The city was incorporated in 1893 and named after Colonel Thomas R. Cornelius, who spotted the railroad opportunity in 1871 and built his warehouse and store adjacent to the tracks that would become the community’s commercial spine. Pacific Building Solutions holds Oregon Contractor License #215897 and serves the commercial and multi-family property market in Cornelius.

Cornelius is one of Washington County’s most diverse communities, with approximately 52.5 percent of residents identifying as Hispanic or Latino and 44.2 percent speaking Spanish as their primary language at home. This demographic profile reflects Cornelius’s role as an agricultural and light-manufacturing community with strong ties to the broader Tualatin Valley’s food and nursery industries. For multi-family property owners and HOA boards serving this community, contractor communication practices, resident notification protocols, and on-site project communication need to account for a bilingual residential environment. Our project teams are experienced in operating in multi-language residential settings.

We do not perform small residential repairs or new construction. Our practice is focused on large-scale commercial and multi-family envelope remediation for HOA boards, property managers, construction attorneys, and ownership groups.

• 4th Highest Population Density in Oregon: Cornelius’s 5,920 people per square mile across 2.01 square miles creates a built environment where multi-family and commercial properties are tightly concentrated along the TV Highway corridor. That density means envelope remediation programs often affect adjacent occupied properties simultaneously and require phasing discipline that accounts for proximity.
• Bilingual Community Resident Communication: With approximately 52.5 percent of residents speaking Spanish as a primary language, multi-family property management in Cornelius requires resident notification, project communication, and scheduling coordination that accounts for a bilingual residential environment. Our project management practices include this dimension as standard operating procedure.
• TV Highway Corridor Commercial Coverage: Cornelius’s commercial and multi-family inventory is concentrated along Tualatin Valley Highway, accessible from our Portland Metro base via Highway 8 through Hillsboro.
• Oregon State Licensing: We hold Oregon Contractor License #215897 as our primary license for all work in Cornelius and Washington County. We also hold Washington License #PACIFBS831MK for ownership groups managing cross-state portfolios.
• Award-Recognized: Portland Business Hall of Fame 2025 | Best of Portland 2025 (Construction) | Elite Preferred James Hardie Contractor | Lead-Safe Certified Firm | BBB Accredited Business.

Exterior Envelope Remediation

Full building envelope assessment and remediation for multi-family and commercial properties throughout Cornelius. Cornelius’s high density and compact geography mean that envelope remediation programs affect tightly adjacent occupied buildings simultaneously. Our phasing and scheduling practices are calibrated for that environment.

Multi-Family and Commercial Siding Replacement

Large-scale siding replacement for apartment communities and commercial properties along the Cornelius TV Highway corridor. We work with James Hardie fiber cement, Cedar, Craneboard, and Stucco/EIFS systems, and execute these as envelope restoration programs that address the weather barrier and flashing before new siding is installed.

Water Intrusion Repair and System Restoration

Washington County’s wet climate and Cornelius’s dense building environment create a consistent risk of water intrusion for older building envelopes throughout the city. We trace the system-level cause, restore the building envelope, and document every phase for HOA boards, property managers, and legal oversight teams.

Construction Defect Repair and Forensic Consulting

When litigation or forensic consultant oversight applies, Pacific Building Solutions brings the documentation protocols and scope discipline required by those environments. We work alongside construction attorneys, owner representatives, and forensic consultants throughout Cornelius and Washington County.

Window System Replacement

Phased window replacement in occupied multi-family buildings using Andersen, Jeld-Wen, Marvin, Cascade, Milgard, and triple-pane systems. All installations include full rough-opening preparation, sill pan flashing, head flashing, and complete weather-barrier integration.

Commercial Building Repairs

Large-scale exterior envelope and building system repairs for commercial properties along Cornelius’s TV Highway corridor, including the light manufacturing, retail, and agricultural service businesses that anchor the city’s commercial economy.

Does Pacific Building Solutions serve Cornelius, Oregon?

Yes. Pacific Building Solutions serves Cornelius and Washington County for commercial and multi-family exterior envelope remediation, siding replacement, water intrusion repair, and related services. We hold Oregon Contractor License #215897 and Washington Contractor License #PACIFBS831MK, and have operated throughout the Portland Metro region for nearly 30 years.

How does Cornelius’s high population density affect envelope remediation project management?

Cornelius is one of the four most densely populated cities in Oregon, with approximately 5,920 people per square mile across just 2.01 square miles. That density means envelope remediation programs in Cornelius often affect adjacent occupied buildings simultaneously. Our phasing and scheduling practices account for that proximity, maintaining weather protection on all open sections and coordinating access with property managers and residents throughout the scope.

Does Pacific Building Solutions work in Cornelius’s bilingual residential environment?

Yes. Approximately 52.5 percent of Cornelius residents speak Spanish as a primary language. Resident notification, project communication, and on-site scheduling coordination in this community require practices that account for a bilingual environment. Our project management teams include this as a standard dimension of project operations in Cornelius.

Does Pacific Building Solutions work on multi-family and commercial properties in Cornelius?

Yes. Multi-family apartment communities and commercial properties along the TV Highway corridor are within our practice. We do not work on single-family homes or small residential repairs.

Is Pacific Building Solutions licensed to work in Cornelius and Washington County, Oregon?

Yes. We hold Oregon Contractor License #215897, which covers the full state of Oregon including Washington County and Cornelius. We also hold Washington Contractor License #PACIFBS831MK. Both are active and current.

Cornelius is a city in Washington County, Oregon, located along Tualatin Valley Highway between Hillsboro to the east and Forest Grove to the west. The city is named after Colonel Thomas R. Cornelius, son of pioneer settler Benjamin Cornelius, who in 1871 learned that Ben Holladay planned to extend the Oregon and California Railroad through the area that would become Cornelius. When Holladay’s plans bypassed Forest Grove and Hillsboro after those cities refused to provide free right-of-way, Cornelius saw the opportunity and built his warehouse and store adjacent to the planned track, establishing the commercial nucleus of what would become the community bearing his family name. The city was incorporated in April 1893.

With a 2020 census population of 12,694 and an estimated 2026 population approaching 16,647, Cornelius covers just 2.01 square miles and has a population density of approximately 5,920 people per square mile, the fourth highest of any city in Oregon. Approximately 52.5 percent of residents identify as Hispanic or Latino, reflecting the community’s deep ties to Washington County’s agricultural and light manufacturing sectors. The city lies entirely within Washington County and is part of the Hillsboro School District. Tualatin Valley Highway forms the commercial spine of the city, connecting it to Hillsboro and Forest Grove and to the broader Washington County employment corridor.

If you represent an HOA board, multi-family property management group, construction attorney, building envelope consultant, or commercial ownership group with a property in Cornelius or west Washington County, Pacific Building Solutions welcomes the opportunity to discuss your project.

Phone: 360-907-1128

Email: info@pacificexteriorsnw.com

Licensed in Oregon (#215897) and Washington (#PACIFBS831MK). Serving the greater Portland Metro area and Southwest Washington.