Hillsboro Manufactured Home Installation & Site Development
Hillsboro is the county seat of Washington County and Oregon's fifth-largest city. While much of Hillsboro is urban, the western and southern portions of the city and surrounding area have rural properties where 3-A Construction, LLC provides manufactured home installation and site development services.

About Hillsboro
Hillsboro sprawls across the Tualatin Valley in central Washington County, with terrain that is predominantly flat on the valley floor and gently rolling toward the Tualatin Mountains to the east and the Coast Range foothills to the west. The city covers a large geographic area, and site conditions vary significantly from the developed eastern neighborhoods near Intel's Ronler Acres campus to the agricultural western portions near Helvetia and North Plains. Soils in the Hillsboro area include Woodburn silt loam and Willamette silt loam on the valley floor, with Laurelwood and Kinton silt loams on the higher ground. These soils are generally workable for construction but require careful drainage management during the wet season, particularly on the flat valley floor where water does not drain naturally.
The City of Hillsboro Planning Department handles building and land use permits within city limits, while the surrounding unincorporated area falls under Washington County Land Use and Transportation. Hillsboro has specific manufactured dwelling standards, and the western rural portions of the city and adjacent county land are where most manufactured home activity occurs. Washington County's rural areas west of Hillsboro, including the Helvetia, North Plains, and Farmington areas, have significant numbers of manufactured homes on agricultural and rural residential parcels. We manage all permitting coordination with both city and county jurisdictions.
Hillsboro is home to Intel's largest manufacturing campus and serves as the hub of Oregon's Silicon Forest technology corridor. Despite its urban core, the western half of the Hillsboro area retains a distinctly rural agricultural character, with nurseries, grass seed farms, and vineyards stretching toward the Coast Range. The Hillsboro School District is one of the largest in Oregon. Our crews work primarily in the rural western and southern portions of the Hillsboro area, including properties along Farmington Road, Reedville and Cornelius Pass Road, the Helvetia area north of Highway 26, and the rural parcels along David Hill Road toward Forest Grove and Gaston.
From our Jefferson headquarters, Hillsboro is approximately one hour and 15 minutes north via I-5 and Highway 99W through Newberg and Sherwood, or via Highway 22 to Highway 18 to Highway 99W. The exact route depends on which part of the Hillsboro area we are serving. We coordinate Hillsboro projects with other Washington County work in Forest Grove, Banks, and the surrounding area to maximize efficiency during each trip to the region.
The contrast between Hillsboro's tech-driven urban core and its agricultural western edges creates an unusual housing dynamic. Rural property owners in the Hillsboro area often choose manufactured homes as practical, cost-effective housing on larger parcels, particularly on farm and nursery properties where the primary land use is agricultural. Our complete site development service is well-suited to these properties, handling everything from site clearing and grading through foundation work, septic installation, home placement, and all required inspections and utility connections.
Local Details
Hillsboro is the county seat of Washington County and the center of Oregon's technology industry. The western portions of the city and surrounding area retain a rural agricultural character with nurseries, farms, and vineyards. The Tualatin Valley stretches across the area between the Tualatin Mountains and Coast Range foothills.
Distance from Headquarters
1 hour 15 minutes north via I-5 and Highway 99W (approximately 65 miles)
Single Point of Contact
One contractor, one contract, one crew
Fully Licensed
CCB, MDI, DEQ & Plumbing Business licenses
City or County
We work in all jurisdictions statewide
Code Compliant
Modern codes for lasting quality
Portfolio
Projects near Hillsboro
See some of our recent construction and manufactured home installations.

Latest Work
High-quality workmanship ensuring lasting durability and aesthetics.

Latest Work
High-quality workmanship ensuring lasting durability and aesthetics.

Latest Work
High-quality workmanship ensuring lasting durability and aesthetics.

Latest Work
High-quality workmanship ensuring lasting durability and aesthetics.

Latest Work
High-quality workmanship ensuring lasting durability and aesthetics.

Latest Work
High-quality workmanship ensuring lasting durability and aesthetics.
Services Available in Hillsboro
Full-service manufactured home installation and site development

Tie Downs & Seismic Retrofitting
Oregon sits atop the Cascadia Subduction Zone, and the question is not if a major earthquake will occur but when.
Learn MoreDemolition
When it is time to clear the way for something new, 3-A Construction, LLC handles demolition and removal with the same professionalism we bring to construction.
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Permits
Navigating Oregon's permitting process is one of the biggest challenges homeowners face when placing a manufactured home.
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Garages & Pole Barns
From detached garages and workshop buildings to agricultural pole barns and equipment storage, 3-A Construction, LLC builds functional outbuildings that serve the needs of rural Oregon property owners.
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ADU Construction
Oregon's progressive ADU legislation has made it easier than ever to add a second dwelling to your property.
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Excavation
3-A Construction, LLC provides professional excavation and grading services for residential and rural properties across Oregon.
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Foundations
The foundation is the most critical structural element of any manufactured home installation.
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Septic Systems
3-A Construction, LLC holds Oregon DEQ License #39002 for septic system installation, making us one of the few contractors who can handle your complete home site β from septic design and installation through home setup β under a single contract.
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Site Development
Transforming raw land into a build-ready home site is what we do best.
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Home Installation
From delivery coordination to final anchoring, 3-A Construction, LLC provides full-service manufactured home installation across Oregon.
Learn MoreAlso Serving in Washington County
Explore other communities we serve in Washington County
Banks
Washington County
Banks is a small rural community in northwestern Washington County surrounded by timber and farmland along the Highway 26 corridor.
View Area βForest Grove
Washington County
Forest Grove sits at the western edge of Washington County where the Tualatin Valley meets the Coast Range foothills.
View Area βStart Your Hillsboro Project
Ready to break ground? Get a fast, free estimate for your site development or home placement directly through our secure portal.