Damascus Sits on Clay, Crawlspaces, and 60 Years of History. Your Inspector Should Know All Three.

Damascus is Clackamas County through and through: wooded lots, clay-heavy soils, and a housing stock that spans old farmsteads to 1990s subdivisions. Moisture finds a way in here. So do unpermitted additions. As a Certified Master Inspector® with 10+ years of home inspection experience and 12 years of contractor experience, Russ knows what to look for in every era.

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Russ Motyko, Certified Master Inspector performing a home inspection
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Damascus (Clackamas County) Housing Market

Showing Clackamas County, OR data (Redfin does not publish city-level stats for this area).
$615,000
Median sale price
39 days
Median days on market
429
Homes sold last month
1,148
Homes for sale now
Live Market Data · Updated March 2026
• Source: Redfin Data Center

Damascus Know-How

These Homes Have History. So Do I.

A Damascus Oregon home representative of the Clackamas County housing stock Russ inspects
Damascus, Oregon

Damascus was largely unincorporated Clackamas County land until major residential development took off in the late 1970s and ran hard through the 1990s. That history produced a housing stock spread across several distinct eras: older farmsteads on acreage, 1960s and 1970s ranch homes with aluminum wiring and aging panels, 1980s and 1990s subdivisions with polybutylene or CPVC plumbing, and a handful of newer builds on previously rural lots. Each era has its own inspection profile, and a real Damascus inspection looks different in each one.

Not only do I have 10 years of inspector experience, I also worked as a Contractor for 12. While my specialty is difficult and high-end framing jobs, I have replaced roofs, built, painted, and installed cabinets, ran wiring, poured concrete, waterproofed showers, set tile, replaced siding and windows, installed drywall, and set doors - just to name a few. That dual perspective is what catches the construction shortcuts in a 1985 tract home and explains what a cracked sill plate actually means structurally.

When I go under a Damascus crawlspace, I'm not just checking boxes. I'm reading what 40 years of Pacific Northwest rain has done to a vapor barrier that was marginal to start with. Wooded lots with clay soil don't drain the way builders planned. I know what normal looks like here, and I know when something needs to be escalated.

I hold Certified Master Inspector® certification (top 3% of the industry), Oregon OCHI license #1898, and Washington DOL license #1856. Every inspection includes free thermal imaging.

Know What You Are Buying

Damascus Homes by Construction Era

The decade a home was built tells you a lot about what the inspection will focus on. Damascus has everything from original farmsteads to 1990s subdivisions, all within a few miles of each other.

Pre-1965 Homes

Damascus's oldest properties are rural in character. Farmsteads on acreage, modest homes on wooded lots, and early residential construction from before the suburban wave hit Clackamas County. These homes carry systems that are 60 to 80+ years old and have often been partially updated by multiple owners in ways that create inspection puzzles.

Galvanized steel supply pipes in these homes have corroded from the inside for 60 or more years. Water pressure is often noticeably reduced, and discoloration at fixtures is common. Full replacement runs $10,000 to $25,000. Knob-and-tube wiring is possible in the oldest structures. Sewer scope inspection is particularly valuable: cast iron drain lines from this era have been in the ground for 65 to 80 years.

Original foundations may also lack modern anchor connections, which matters on sloped, wooded lots where soil movement is a seasonal reality.

Common findings in pre-1965 homes
Galvanized steel supply pipes
Corroded internally. Reduced pressure and discoloration at fixtures. Replacement $10,000 to $25,000.
Cast iron drain lines
Scale buildup, joint seepage, and root intrusion after 65+ years. Sewer scope essential.
Crawlspace moisture and wood rot
Foundations without modern waterproofing managing decades of Clackamas County rainfall.
Original or partially updated electrical
Multiple-decade patchwork updates that do not always meet current code. Knob-and-tube possible.
Foundation anchor deficiencies
Older rural foundations often lack modern anchor bolt connections. Matters on sloped lots.

1965–1985 Homes

This era covers Damascus's early suburban growth. Ranch homes and split-levels spread across Clackamas County as the area shifted from rural to residential. These homes are solid and often well-sited on large lots, but this era generates some of the most expensive inspection findings per dollar of purchase price in the Damascus market.

Aluminum branch circuit wiring was common in homes built from 1965 to 1973. Without proper anti-oxidant treatment and compatible devices, it poses a fire risk at connection points. Federal Pacific and Zinsco panels are also prevalent in this era and have documented breaker failure histories. Identifying these before closing is one of the most important things an inspection can do.

Older oil furnaces are common in Damascus homes from this period. These systems require honest assessment. Many are well past their expected lifespan and running on borrowed time.

Common findings in 1965–1985 homes
Aluminum branch circuit wiring
Fire risk at connection points. Requires CO/ALR devices or full replacement.
Federal Pacific and Zinsco panels
Documented safety concerns. Insurance carriers frequently flag or decline coverage.
Aging oil furnaces
Common in Damascus homes from this era. Units over 25 years old carry real replacement risk.
Crawlspace moisture and vapor barrier failure
Very common in Clackamas County's clay-heavy soils. Thermal imaging finds what the eye misses.
Drainage and grading issues
Wooded lots with clay soil shed water toward foundations. A consistent exterior finding in this era.

1985–2005 Homes

This was peak Damascus development. Subdivisions spread across Clackamas County as the Portland metro expanded east. These homes look modern and feel solid, but they are now 20 to 40 years old and carry their own specific inspection concerns. LP hardboard siding was common through the 1990s and fails from the bottom up when moisture gets behind it.

Polybutylene plumbing appeared in some Damascus builds from the late 1970s through the early 1990s. CPVC was common from the mid-1990s forward. Polybutylene degrades from chlorine exposure in municipal water and fails at fittings suddenly. CPVC becomes brittle with age, especially near heat sources. Both warrant close attention. Unpermitted additions on older rural parcels also peak in this era, as the area grew quickly and permit oversight was inconsistent.

Common findings in 1985–2005 homes
Polybutylene plumbing
Degrades from chlorine. Sudden fitting failure. Insurance often requires replacement. $10,000 to $20,000 to replace.
CPVC plumbing brittleness
Becomes brittle with age and heat exposure. Cracking at fittings is the early warning sign.
LP hardboard siding failure
1990s hardboard siding absorbs moisture in wet climates. Fails from the bottom up and at any penetration.
Unpermitted additions and structures
Damascus's rapid growth era left many properties with shops, sheds, or rooms built without permits.
Roofs reaching end of service life
25-year shingles from the late 1990s and early 2000s are now past expected lifespan.

New Construction in Damascus

New construction in Damascus is less common than in some Portland-area markets, but it happens, particularly on previously rural lots being converted to residential use. Buyers sometimes assume that a new build doesn't need inspection. That assumption is expensive when it turns out to be wrong.

New construction on previously rural lots in Clackamas County consistently turns up grading and drainage issues. Freshly disturbed soil compacts unevenly. Lot drainage plans don't always survive contact with actual topography. HVAC ductwork installation defects, attic ventilation problems, and window flashing details that don't meet manufacturer requirements are also regular findings in new builds.

The 11-month warranty inspection is specifically designed for buyers who want to document defects before the builder's one-year warranty expires. The clock starts at closing, not when you discover the problem.

Common findings in new construction
Grading and drainage toward foundation
Freshly disturbed lots in Clackamas County often drain toward the foundation. Common and expensive post-close.
HVAC installation defects
Improperly sealed ducts, disconnected exhaust vents, and commissioning errors found regularly.
Flashing deficiencies at windows and doors
Improper installation allows moisture into wall assemblies that look fine from outside.
Insulation and ventilation gaps in attic
Thermal imaging finds these. Invisible to the eye and covered by builder warranty if caught in time.
Radon (yes, even in new homes)
Clackamas County is EPA Zone 1 for radon. The geology doesn't care how new the house is. Test every purchase.
Home Risk Quiz

Is Your Dream Home Hiding Significant Issues?

See Your Potential Home Through an Inspector's Eyes.

Transform your observations into a clear risk profile. In just two minutes, you will receive a breakdown of what a professional inspector would be concerned about based on what you saw.

2 minutes
Based on what you saw at the showing
No technical knowledge needed
Free Assessment
Begin Assessment

8 quick questions. No contact info required.

1 of 8
01

How old is the home?

You'll have the year built from the listing or the seller. Home age is the single biggest driver of inspection risk.

02

What did the roof look like from the street?

Look for curling shingles, dark patches, missing granules, or visible moss. A good look at the roof from the ground can tell you more than you'd think.

03

Did you notice any musty smell inside the home?

A musty or earthy odor is the most reliable clue buyers can detect about crawlspace moisture or mold — even without going under the house.

04

Did you see the electrical panel? What did it look like?

It's usually in a utility room, garage, or hallway. Federal Pacific (orange breakers) and Zinsco panels are known fire risks and still common in Portland-area homes from the 1960s to 1980s.

05

Did you notice any water stains on ceilings or walls?

Look near the corners of ceilings, under windows, and in bathrooms. Even old-looking stains matter — they show water has been in places it shouldn't be.

06

How did the overall condition of the home feel?

Trust your gut. A home that feels well-loved and maintained usually is. One that feels neglected almost always has deferred items hiding out of sight.

07

Did the home have a finished basement, addition, or garage conversion?

These are some of the most common places to find unpermitted work. A finished space isn't automatically a problem — but without permits, there's no record of whether it was done safely.

08

Where are you in your homeownership journey?

This helps us tailor your results to your situation.

Know Your Neighborhood

Damascus Area by Area

Damascus covers a lot of ground. Each part of the area has its own housing age, lot character, and inspection profile. Here is what buyers typically encounter.

Central Damascus
1970s – 1990s

The core of Damascus's residential development from the suburban growth era. Ranch and split-level homes on wooded lots. This is where aluminum wiring, Federal Pacific panels, and crawlspace moisture issues are most concentrated. Inspection findings here tend to be numerous and specific to this era's material failures.

Rural Properties and Acreage
Pre-1970s – Mixed

Older farmsteads and homes on larger parcels define Damascus's rural character. Outbuildings, detached garages, and shops are common and often unpermitted. Well and septic systems require specialist evaluations. Older galvanized supply pipes and cast iron drain lines are typical. Lot drainage on sloped, wooded land adds complexity.

Near Highway 212 Corridor
1980s – 2000s

Subdivision-era homes along the main Damascus corridor. Mix of polybutylene and CPVC plumbing depending on the build year. LP hardboard siding failure is a regular exterior finding in 1990s homes here. Homes from this period often have decks and additions that may or may not have been permitted.

Damascus Near Happy Valley Border
1990s – 2000s

Where Damascus meets Happy Valley, housing tends to be slightly newer and more suburban in character. Homes from the late 1990s and 2000s are common here. CPVC era plumbing, composite siding, and roofs approaching end of service life are the primary inspection focus. Radon testing is still warranted throughout Clackamas County regardless of home age.

Hillside and Sloped Lots
Mixed eras

Damascus has significant topographic variation. Homes on hillside lots face specific challenges with drainage, retaining walls, and foundation movement on clay soils. Distinguishing normal seasonal settling from structurally significant movement is part of what a thorough inspection evaluates. Retaining walls and drainage infrastructure deserve close attention here.

Newer Damascus Infill
2005 – present

Newer construction on previously rural parcels scattered throughout Damascus. New does not mean defect-free. Grading and drainage on former wooded lots, HVAC installation quality, and window flashing details are the focus. The 11-month warranty inspection is a useful tool for buyers in this era who want builder defects documented before the warranty clock runs out.

Clackamas County Risk Factors

What Makes Damascus Homes Different to Inspect

Damascus's soils, climate, and history create specific inspection concerns that go beyond what you would find in more urban markets.

Crawlspace Moisture

Most Damascus homes sit over a crawlspace. Clackamas County gets 40 to 50 inches of rain per year, most of it from November through March. On clay-heavy soil that drains slowly, that water ends up under your house. Damaged vapor barriers, wood rot at sill plates, and standing water near piers are the most consistent findings Russ documents in Damascus. Free thermal imaging on every inspection helps identify moisture that a standard visual walkthrough will miss.

Top finding across all Damascus eras

Clay Soils and Drainage

Clackamas County's clay-heavy soils expand when wet and shrink when dry. That seasonal movement cycle affects foundations, drainage infrastructure, and any structure with ground contact throughout Damascus. Wooded lots compound the problem: tree roots disrupt drainage paths and accelerate soil movement near foundations. Grading toward the foundation is one of the most common exterior findings Russ documents in this area.

Affects foundations across all eras

Unpermitted Structures

Damascus's rural history means many properties have shops, sheds, converted garages, or living additions built without permits. Rapid growth in the 1980s and 1990s outpaced permit oversight in some areas. Russ documents every accessible structure, notes unpermitted work when he finds it, and explains what that may mean for your insurance, financing, and future resale. A BuildFax permit report is available as an add-on if you want a full permit history.

Common on older rural properties
Full Scope Inspection

Everything We Check in a Damascus Home

Every inspection covers all accessible systems and components, roof to crawlspace. We physically enter attics and crawlspaces. We operate every system we can safely access. We do not check boxes. We evaluate the home.

Roof & Attic

Shingles, flashing, gutters, attic insulation, ventilation, and moisture.

Electrical

Panel, breakers, wiring type, outlets, GFCI and AFCI protection.

Plumbing

Supply pipe material, drain lines, water heater, pressure, and fixtures.

HVAC

Furnace, AC, heat pump, ductwork, and distribution. Age and condition noted.

Foundation & Structure

Cracks, settling, retaining walls, and visible structural framing.

Crawlspace

Full physical entry. Moisture, vapor barrier, insulation, and wood rot.

Interior

Walls, ceilings, floors, windows, doors, and built-in appliances.

Exterior & Grading

Siding, deck, driveway, grading, and drainage away from foundation.

Free Thermal Imaging on Every Damascus Inspection

Clackamas County's clay soils and heavy rainfall mean moisture finds its way into crawlspaces and wall assemblies in ways that are invisible to the eye. The infrared camera finds it. Electrical hot spots, insulation gaps, and HVAC leaks are also standard thermal findings. Included at no extra charge because in this climate it is not optional equipment.

Learn More →
EPA Zone 1 County

Radon Testing in Damascus

Clackamas County is classified as EPA Zone 1, the highest predicted average indoor radon potential. That includes all of Damascus. Radon is a colorless, odorless radioactive gas produced naturally by uranium breaking down in soil and rock. It seeps into homes through crawlspace openings, foundation cracks, and soil contact. You cannot smell or see it. The only way to know your level is to test.

Zone 1 is a county-level designation, but radon levels vary significantly from property to property based on soil conditions, foundation type, and ventilation. Your neighbor's test result does not predict yours. Every home needs its own test.

We recommend radon testing on every Damascus inspection. If levels exceed 4 pCi/L (the EPA action level), a mitigation system typically costs $800 to $1,500. That is a reasonable item to address before closing. It is much harder to deal with after.

Learn About Radon Testing →
Radon facts for Damascus buyers
#2
Second-leading cause of lung cancer in the U.S. After smoking. Responsible for about 21,000 deaths per year nationally.
1 in 4
Portland metro homes test above EPA action level Zone 1 designation means elevated risk. Individual testing is the only way to know.
48h
Test takes 48 hours Continuous electronic monitor placed at the start of the inspection. Digital results delivered promptly.
$150
Added to your inspection Standalone testing is $195. Add it at booking and save $45.

Transparent Pricing

Simple, Flat-Rate Pricing

No hidden fees, no surprise add-ons. Thermal imaging is included on every inspection.

Starter Standalone Inspection
$395up to 1,000 sq ft
  • Full home inspection
  • Free thermal imaging
  • Roof & crawlspace
  • Detailed digital report
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Most Common Inspection + Radon
$545up to 1,000 sq ft
  • Full home inspection
  • Free thermal imaging
  • Detailed digital report
  • EPA-certified radon test
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Best Value Inspection + Radon + Mold
$740up to 1,000 sq ft
  • Full home inspection
  • Free thermal imaging
  • Detailed digital report
  • EPA-certified radon test
  • Mold air sampling & lab results
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Common Questions

Damascus Home Inspection FAQs

Questions buyers in Damascus and Clackamas County ask most before booking.

Most Damascus home inspections take 3 to 4 hours depending on size, age, and condition. Older homes from the 1960s to 1980s and properties with crawlspaces, detached structures, or large wooded lots often run toward the longer end because there is more to document. You are welcome to attend the full inspection or join for the walkthrough at the end. Either way, Russ will walk you through every significant finding in person.
Crawlspace moisture is the most consistent finding across Damascus. Beyond that, older homes frequently turn up aluminum branch circuit wiring, Federal Pacific and Zinsco electrical panels, polybutylene or CPVC plumbing depending on build year, and drainage issues on clay-heavy wooded lots. Unpermitted additions and outbuildings are also common on older rural properties. Damascus has a specific inspection profile that differs meaningfully from more suburban Portland-area markets.
Yes. Damascus is in Clackamas County, which the EPA classifies as Zone 1, the highest predicted average indoor radon potential. Testing is recommended for all homes here regardless of age or foundation type. Radon testing can be added to any inspection for $150. A continuous electronic monitor runs for the required 48-hour test period and the results are included in the inspection report. Learn more about radon testing.
Most Damascus homes sit over a crawlspace, and moisture is the top finding Russ documents in this area. The Clackamas County climate delivers 40 to 50 inches of rain per year, most of it from November through March. On clay-heavy soil, that water has nowhere to go except under your house. Damaged vapor barriers, wood rot at sill plates, and standing water near piers are all regular findings. Free thermal imaging on every inspection helps identify moisture that is not visible to the naked eye. If findings are significant, mold air sampling is available as an add-on.
Yes. Damascus properties frequently include detached garages, shops, or storage buildings, and Russ includes all accessible structures in the inspection scope. Add-on pricing for detached structures is $50 for small structures and $100 for larger ones. If a structure appears unpermitted, that gets noted in the report. A BuildFax permit report is also available as a $20 add-on if you want a full permit history for the property.
Your report is delivered through Spectora with high-resolution photos of every significant finding, severity ratings, and plain-language explanations. The priority is accuracy and detail, not speed. Most reports go out the same day. Older Damascus homes with more findings may take until the next morning. After you get your report, call or text with any questions. Unlimited follow-up is included.
Thermal imaging is included at no extra charge on every inspection. Competitors in the Portland metro typically charge $150 to $250 for this as a separate add-on. Russ includes it because in Damascus's crawlspace-heavy, high-rainfall climate, the infrared camera consistently reveals moisture intrusion, insulation voids, and electrical anomalies that are invisible to the naked eye. Learn more about thermal imaging.
The Certified Master Inspector® (CMI®) designation is the highest credential in the home inspection profession, held by the top 3% of the inspection industry. It requires a verified track record of completed inspections, education, and peer review. Russ is Oregon City's only Certified Master Inspector® with 10+ years of home inspection experience and 100+ inspectors trained. Learn more about the CMI® designation.
Yes. Trusted Home Inspections is veteran-owned and offers a 10% military discount for veterans, active duty, reservists, National Guard members, and military families. Mention your service when you book. See full details at trustedhome.org/military-discount.
That decision is yours to make. During the inspection contingency period, you can negotiate repairs, request credits, or walk away. None of those options exist after closing. The report gives you what you need to make an informed decision. Russ is available after delivery to help you understand what is critical, what is manageable, and what the findings mean in plain terms. The report is the tool. What you do with it is up to you and your agent.

Where We Inspect

Serving Portland Metro & Southwest Washington

Available 7 days a week within a ~35-mile radius of Portland. Not sure if we cover your area? Just call.

~35-mile radius from Portland
Available 7 days a week
Dual-licensed OR & WA
Oregon state-licensed home inspector seal
Oregon Certified OCHI Lic. #1898
Washington state-licensed home inspector seal
Washington Licensed DOL Lic. #1856

Multnomah County home inspections. Portland and the rest of Multnomah County are full of older housing stock, including 1920s craftsman bungalows in SE Portland, Pearl District lofts, and mid-century homes in NE Portland. Older homes mean knob-and-tube wiring, cast iron drains, and aging foundations. I’ve inspected hundreds of homes across Multnomah County and know exactly what to look for in each neighborhood.

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