Property Inspections: A Plain-Language Guide
The phrase “property inspections” is broader than most homeowner searches imply. It covers single-family residential work governed by ASHI or InterNACHI standards, commercial-property condition assessments under ASTM E2018-15, multi-family inspections priced per unit, and industrial assessments that require separate certifications and engineering sign-off. Each property type has a different inspector roster, a different scope document, a different cost structure, and a different deliverable. This guide walks the four categories, explains how to choose the right inspector for the property in front of you, and covers what buyers and owners typically miss when they treat all property inspections as a single service.
The four property-inspection categories
Residential single-family inspections are the most familiar. An ASHI or InterNACHI certified inspector evaluates the home against a published standard of practice — roof, exterior, structure, electrical, plumbing, HVAC, interior, insulation, ventilation, and appliances. Front Range pricing in 2026 sits at $400-700 for a typical 1,500-3,000 sq ft home, with $150-300 add-ons for sewer scope, radon, or thermal imaging.
Commercial property condition assessments (PCAs) follow ASTM E2018-15, the published standard for due-diligence inspections on commercial real estate. PCAs evaluate building systems against expected remaining useful life, produce an Immediate Repair Cost estimate and a 10-year capital expenditure forecast, and routinely run 50-200 pages. Cost: $1,000-5,000 depending on building size and complexity, with major office or industrial buildings running higher.
Multi-family inspections combine the residential standard with a per-unit scope. A 20-unit apartment building gets a building-envelope-and-common-areas inspection plus per-unit inspections (sampled or full, depending on lender requirements). Fannie Mae and Freddie Mac loan due-diligence often requires a 25-100% unit sample, which drives cost and timeline. Typical cost: $200-400 per unit plus common-area scope.
Industrial inspections — manufacturing facilities, warehouses, distribution centers — typically require licensed professional engineers rather than home inspectors. Scope includes structural engineering review, fire protection (NFPA standards), electrical capacity, HVAC for process loads, and environmental compliance. Cost varies enormously; small warehouse PCAs run $3,000-8,000, while complex manufacturing facilities can run into five figures.
Residential property inspections in depth
The residential property inspection is the baseline most buyers encounter. The ASHI Standard of Practice governs scope: visual inspection of accessible systems, no destructive testing, documented exclusions for specialty items. The inspector arrives with a moisture meter, voltage tester, GFCI tester, infrared thermometer, and increasingly a thermal-imaging camera and drone for roof access.
Time on site for a 2,000 sq ft single-family detached runs three to four hours. The report typically lands within 24-48 hours and ranges from 30 to 80 pages with photo documentation. Buyers should read the summary section first — it surfaces the material findings — then work through the detailed sections for context.
Residential property inspections do not cover hazardous materials testing (asbestos, lead, mold) unless contracted separately. Buyers in pre-1978 Front Range homes should add a lead inspection if visible deteriorated paint is present, and homes with visible moisture or musty odors warrant an air-quality mold test as a follow-up.
Commercial property condition assessments
Commercial PCAs differ from residential inspections in scope, deliverable, and intended audience. The intended audience is typically a lender, an institutional buyer, or a corporate real-estate group. The deliverable supports underwriting and capital-planning decisions, not just buyer renegotiation.
ASTM E2018-15 defines the minimum scope: site improvements, structural frame and building envelope, roofing, plumbing, HVAC, electrical, vertical transportation (elevators), life safety and fire protection, and interior finishes. The PCA report includes a Property Condition Report (PCR) with an Immediate Repair Cost table and a long-term capital reserve table running 10-12 years forward.
Commercial inspectors typically hold credentials from the American Society for Testing and Materials (ASTM), the International Code Council (ICC), or professional engineering licenses. The inspector team often includes multiple specialists — a structural PE, an MEP engineer, a roofing consultant — coordinated by a lead assessor. That team structure is why commercial PCA pricing starts at $1,000 and scales quickly with building complexity.
Multi-family property inspections
Multi-family inspections sit between residential and commercial. The building envelope, common areas, mechanical rooms, and exterior systems get inspected once. The individual units get inspected on a sampling schedule dictated by lender requirements or buyer scope.
Lender-driven sample sizes follow rough conventions: Fannie Mae Small Loan program typically requires inspection of every unit on smaller properties (5-20 units), with sampling allowed on larger portfolios. HUD-financed properties have separate inspection protocols. Private-equity buyers often request 100% unit inspections regardless of lender minimums because the underwriting model values direct verification of unit condition.
Multi-family inspections surface different defects than single-family inspections. Common findings include deferred maintenance on roofing and exterior siding (postponed across years by previous owners trying to maximize cash flow), aging boilers and central HVAC equipment, plumbing supply pipe corrosion in galvanized systems, and ADA compliance issues in common areas. The report typically separates findings by tenant-occupied versus vacant units, since access constraints affect what could be inspected.
How to choose the right inspector
The first filter is property type matched to inspector credential. ASHI Certified Inspector and InterNACHI Certified Professional Inspector designations cover residential single-family and small multi-family (up to 4-plex in most service-area conventions). Larger multi-family, mixed-use, and commercial work requires a commercial inspector — typically an ASTM-trained PCA professional, often a licensed PE.
The second filter is sample-report review. A reputable inspector will share a redacted sample report before the engagement. The sample should show photo documentation, clear separation of observation from recommendation, executive-summary prioritization, and standards-of-practice references. If the sample report is a one-page checklist, the inspector is not the right fit for any property type larger than a small condo.
The third filter is insurance. Every property inspector should carry general liability and errors-and-omissions insurance. Commercial inspectors typically carry higher E&O limits ($1M-$5M) given the larger transaction values their reports support. Buyers can request certificates of insurance before signing the engagement letter.
Our broader guidance on hiring a home inspector on the Front Range covers the residential side of this filter in detail, including how to read a sample report and what questions to ask before booking.
Cost framing across property types
Residential single-family in the Front Range market in 2026 runs $400-700 for the base inspection, with add-ons for radon ($150-200), sewer scope ($150-250), and thermal imaging ($100-150) priced separately. Total cost on a complete inspection package typically lands $700-1,200.
Commercial PCA pricing varies more. A 5,000-15,000 sq ft retail or office building runs $1,500-3,500 for a standard ASTM E2018-15 PCA. Mid-size office (15,000-50,000 sq ft) runs $3,000-6,000. Industrial buildings and larger office complexes start at $5,000 and can exceed $15,000 for full institutional-grade due diligence.
Multi-family pricing scales by unit count and sample size. A 24-unit building with 50% unit sampling typically costs $4,000-8,000 (common areas plus 12 unit inspections at $200-400 each, plus envelope scope). A 100-unit property with full unit sampling runs $15,000-30,000.
For context on what individual home inspectors actually earn from these fees, see our breakdown of what a home inspector keeps from each consumer fee, which covers insurance, vehicle, software, and continuing-education overhead against gross billings.
Timeline expectations
Residential inspections complete in three to four hours on site with a 24-48 hour report turnaround. Commercial PCAs take one to three days on site for typical buildings and one to three weeks for the report, given the engineering review and multi-disciplinary input. Multi-family inspections scale linearly with unit count: a 24-unit property takes two to three days; a 100-unit property takes a week or more if every unit is inspected.
Buyers and owners should factor inspection lead time into the broader transaction or capital-planning timeline. Lenders typically require the PCA in hand 30-45 days before closing on commercial deals, which means engaging the inspector during the loan-application phase rather than after lender commitment. Residential timelines are tighter; the inspection-objection period in Colorado residential contracts is typically seven to ten days from acceptance, which leaves limited room for specialist follow-ups.
Common property-inspection mistakes
Three mistakes recur across all property types. The first is hiring the wrong inspector for the property — booking a residential ASHI inspector for a 30-unit apartment building, or booking a commercial PCA team for a single-family home. The credentials and scope documents do not transfer cleanly, and the report deliverable will not match the buyer’s actual due-diligence need.
The second is skipping specialist add-ons. A residential inspection that does not include a sewer scope on a pre-1980 home with mature trees nearby has a known blind spot. A commercial PCA that does not include environmental Phase I site assessment ignores contamination liability that often dwarfs the building’s repair cost. Multi-family inspections that skip per-unit sampling rely on the seller’s representations about unit condition, which routinely understate deferred maintenance.
The third is treating the report as a pass/fail document rather than a negotiation and capital-planning tool. The report’s value is in surfacing condition and cost; the buyer or owner decides what to do about the findings. Inspectors do not pass or fail properties — they document them.
Industrial property inspections
Industrial property inspections differ from commercial PCAs in scope complexity. The building shell may follow ASTM E2018-15 conventions, but process equipment, specialized electrical capacity, fire-suppression for high-hazard occupancies, and environmental compliance frequently dominate the inspection findings. The inspector team usually includes a licensed structural engineer, a fire protection engineer reviewing NFPA compliance, an electrical engineer evaluating service capacity against process loads, and an environmental professional reviewing Resource Conservation and Recovery Act (RCRA) compliance for facilities that handle hazardous waste.
Roofing on industrial buildings carries higher condition risk than on residential or commercial properties. Large flat-roof areas, mechanical-equipment penetrations, ponding water concerns, and remaining-useful-life calculations on built-up or single-ply membrane systems can make roofing the single largest line item in the capital reserve forecast. Industrial buyers routinely budget $200,000-$1,000,000 in five-year roofing capital on mid-size warehouses, which is why the PCA roofing scope warrants a dedicated specialist rather than the generalist inspector.
HVAC capacity on industrial properties is often process-load driven rather than comfort-driven. The inspector reviews whether the existing equipment can support the buyer’s intended use, not just whether it meets nominal capacity for the building’s floor area. A manufacturing buyer moving into a former distribution warehouse may need to invest substantially in additional HVAC capacity, and the PCA report should flag that gap during due diligence.
Property inspections and Front Range conditions
Front Range Colorado properties carry condition risks that show up across all property types. Expansive bentonite and claystone soils drive foundation movement on residential homes and slab cracking on commercial slab-on-grade construction. Hail exposure damages roofing systems faster than national averages, and many Front Range properties have had multiple roof replacements driven by insurance claims rather than condition. Radon levels are elevated relative to national averages, and commercial buildings with occupied basement-level office space should have radon testing as part of due diligence.
The freeze-thaw cycle stresses building envelopes — sealants, flashings, and exterior cladding all weather faster at altitude than in milder coastal markets. Property inspections in Front Range counties (Denver, Douglas, Jefferson, Arapahoe, Boulder, El Paso) should include scope adjustments for these regional factors. A commercial PCA that does not mention hail exposure or radon in the executive summary is missing context the buyer needs.
References
- ASHI Standard of Practice for residential home inspections — American Society of Home Inspectors
- InterNACHI Residential Standards of Practice — International Association of Certified Home Inspectors
- International Code Council building-code standards — International Code Council