An inspection for a historic home in Phoenix takes more than the standard report: add a camera scope of the sewer line, the state's termite report and, for any house built before 1978, the lead-paint check federal rules give you 10 days to arrange. The findings count twice in an HP district, because the City reviews exterior work, so read the report for which repairs are routine maintenance and which need a certificate from the Historic Preservation Office.
Buyers under contract, or about to be, on a house in one of Phoenix's historic districts.
At a glance
| Home inspector | Certified by the State Board of Technical Registration |
|---|---|
| Termite report | Wood-destroying insect inspection report, by a certified applicator |
| Lead-paint window | 10 days for pre-1978 homes, unless changed or waived in writing |
| Sewer line | Owner's from the house to the City main (City Code 28-5) |
| In-kind repairs | No HP review needed |
What an inspection of a historic home in Phoenix should cover
On a Phoenix house from the 1920s to the 1950s, the findings that cost most sit out of sight: the sewer line under the yard that you, not the City, maintain; flood irrigation water against the foundation; and lead paint under newer coats. A general inspection looks at the whole house, but you want four more checks, and each is done by a different certified specialist. Book them together so every report is back before your inspection period ends.
| Check | Who does it | What it tells you |
|---|---|---|
| Home inspection | An inspector certified by the Arizona State Board of Technical Registration | The condition of the structure and systems on the day |
| Wood-destroying insect report | An applicator certified in wood-destroying organism management | Visible termites and conditions that invite them, on the day |
| Sewer camera scope | A plumber (the City does not inspect private lines) | Roots, cracks and joints in the line you will own |
| Lead-based paint inspection or risk assessment | A lead inspector or risk assessor | Where lead paint is and whether it is deteriorating |
| Asbestos sampling | A trained, accredited asbestos professional | Whether a damaged or soon-disturbed material contains asbestos |
If you only add one check to the general inspection, make it the sewer scope. A broken line is your cost, not the City's, everywhere on your side of the right of way. The rest of this guide takes each check in turn, then shows how Historic Preservation zoning in Phoenix shapes the repairs you ask for.
Who does each inspection for a historic home in Arizona
Arizona splits the work between licenses, and a buyer who knows which license covers what can read each report for what it is.
Arizona home inspector certification
Home inspectors are certified by the State Board of Technical Registration. To apply, an inspector must be 18 or older, pass a board-approved exam within two years before applying, complete an approved course, hold a fingerprint clearance card and show financial assurance. The board's requirements include the national exam, 84 hours of classroom training and 30 parallel inspections. Within 60 days of certification, and before any paid inspection, the inspector must carry errors and omissions insurance of $200,000 aggregate and $100,000 per occurrence, or a $25,000 bond or $25,000 in net assets. Ask for the certificate number when you book.
The termite report on a historic home
Arizona law calls it a wood-destroying insect inspection report, and most people call it the Wood Infestation Report. It is a written report on a form approved by the director of the Arizona Department of Agriculture, made for a sale or refinance. Only an applicator certified in wood-destroying organism management, with at least five hours of in-house training, may complete it, and the company keeps it on file for three years. The report records visible and accessible insects and conducive conditions on the inspection date. It is not a guarantee, and it cannot be done by anyone who owns or lives in the house.
If termites turn up, the treatment proposal is a separate document from the report, and Arizona law requires it to list alternatives, including integrated pest management. Compare the proposal against the report rather than signing the first one offered.
Water, sewer and drainage: the inspection a historic home needs most
The three checks in this section come back to water, and each starts outside the walls: a sewer line you repair on your side of the right of way, flood irrigation that puts 2 to 3 inches on the yard, and adobe that loses strength when it stays wet.
Sewer line scope for a historic home in Phoenix
In Phoenix the owner is responsible for cleaning and maintaining the sewer line from the house to the City main in the street or alley. Under City Code Section 28-5, the City repairs broken service lines only inside the public right of way. The City does not inspect private sewer lines and tells owners to call a plumber. Tree and shrub roots are a leading cause of backups because they enter cracks and poorly sealed joints, so a lot with mature trees near the line deserves a closer look. A camera scope before the inspection period ends puts that line on the record while you can still negotiate.
Flood irrigation and drainage around a historic home
If the house is in a neighborhood with Salt River Project flood irrigation, know how it works. SRP's zanjeros open a gate at the neighborhood's high point, and the ditches, pipes and valves from there to each lot belong to the homeowners. A flooded yard gets 2 to 3 inches of water that usually soaks in within a few hours, about every 14 days from April to September and every 28 days in winter. Owners must keep the water on their own lot and keep the berms in repair; SRP's manual suggests berms 12 to 18 inches wide.
That much water near a foundation is why you ask the inspector to look hard at grading, the foundation and any crawlspace for moisture. The City's design guidelines say rehabilitation should correct drainage by re-grading earth away from the foundation and adding downspouts and splash blocks. Irrigation water is untreated and not for drinking; the SRP Water Contact Center is (602) 236-3333.
Adobe walls and cement stucco on a historic home
Moisture is the main enemy of adobe, according to the National Park Service's Preservation Brief 5: an adobe building survives on how well it sheds water, and saturated adobe loses its strength. Cement stucco came into use on adobe early in the 20th century, with the Southwest revival styles. It expands 3 to 10 times more than adobe in heat, cracks, lets water in and then stops the wall drying. If a house has adobe walls under cement stucco or concrete patches, ask the inspector to look for cracking and trapped moisture at the base of the walls.
Wiring, cooling, windows and roofs in an older Phoenix house
These are the systems where an old house differs most from a new one, and where the HP rules touch the fix.
Knob-and-tube wiring in a historic home
The US Department of Energy describes knob-and-tube wiring, used before about 1930, as a possible fire hazard where it touches insulation, and says active knob-and-tube should be replaced before a house is insulated. If the inspector finds it, get an electrician's opinion on what is still live before you plan any insulation work.
Evaporative coolers on a historic home
If the house has an evaporative cooler, note that the Department of Energy says these can use about one-quarter the energy of central air in a dry climate, but they need an open window or vent because they blow air through the house. Ask the inspector whether the cooler, its ducting and its roof mount are sound, and whether the house also has refrigerated air.
Steel casement and wood windows in a historic home
If the report flags original steel casements or wood sashes as worn, check before you price replacements: the City's Historic Preservation Office notes energy auditors usually find repair, weatherization, insulated blinds, films and thicker glass in the existing sashes more cost-effective than new windows. The HPO publishes wood and steel casement window repair bulletins and points owners to National Park Service Preservation Briefs 9 and 13. APS and SRP residential customers can get a $99 energy audit, and the City offers matching grants for window efficiency work.
Roof material on a historic home under HP rules
In an HP district, replacing roofing in kind is routine maintenance. Switching material type, such as shingle to tile or metal, is not. Dimensional composition shingles are accepted in place of wood shingles. So when the report says the roof is at the end of its life, price the same material, not an upgrade the City may not approve.
Lead paint and asbestos in an inspection of a historic home
Lead-based paint was banned for homes in 1978, and the federal disclosure rule covers most housing built before then, which takes in the houses in Phoenix's historic districts. Before you sign a contract, the seller and agents must give you the EPA pamphlet Protect Your Family From Lead in Your Home, disclose any known lead paint or hazards, hand over available records and reports, and put a Lead Warning Statement in the contract.
You then get 10 days to have a lead-based paint inspection or risk assessment done. The parties can agree in writing to lengthen or shorten that period, and you can waive it. EPA estimates about three-quarters of US homes built before 1978 still have some lead paint. Paint in good condition is usually not a hazard; peeling, chipping, chalking or cracking paint is, and so is the dust from friction surfaces such as doors and window sills. If you plan to repair windows or repaint, keep the 10 days.
Lead-safe contractors for historic home repairs
EPA's Renovation, Repair and Painting Rule requires anyone paid to disturb painted surfaces in a pre-1978 home to be lead-safe certified. It generally does not cover owners working on their own home, but it does cover landlords and flippers. Arizona is administered by EPA rather than a state program. The National Lead Information Center is 1-800-424-5323.
Asbestos testing in a historic home
Asbestos can be in vermiculite attic and wall insulation, vinyl floor tiles and sheet-flooring backing and adhesive, roofing and siding shingles, textured paint and patching compound, cement sheets around stoves, pipe coverings and furnace gaskets. You usually cannot tell by looking. EPA's advice is to leave undamaged material that will not be disturbed alone and to test before remodeling or when a material is damaged. Sampling should be done by a trained, accredited professional, and EPA advises using separate firms for inspection and removal.
After the inspection: repair requests in a Phoenix HP district
Once the reports are in, sort every finding into two piles. Ordinary maintenance, such as painting, repairs and replacing materials in kind, needs no permission from the City as long as materials and design do not change, and interior work that does not touch the exterior needs no HPO review. Anything that changes the exterior and needs a building permit needs a Certificate of No Effect, an over-the-counter staff approval for minor work, or a Certificate of Appropriateness, which goes to a public hearing. Neither has a City review fee.
Repair or replace: HP guidelines for a historic home
The City's design guidelines say to repair historic features rather than replace them, and where repair is not possible, to match the original in design, material, color and texture. Original brick, stucco or wood siding should be kept. A seller's offer to replace original windows or reside a wall can cost the house its contributing status, and a project that would make a house noncontributing cannot be approved as a Certificate of No Effect. Contributing status is also what the Arizona historic property tax reduction depends on, so weigh a repair credit against a replacement done before closing.
Check the title of a historic home for a grant easement
The City's Exterior Rehabilitation Grant pays half the cost of approved work such as roofs, foundations, walls and windows, from $5,000 to $20,000 per property. In return the owner sells the City a conservation easement on the exterior for 15 or 20 years, recorded on title, and it binds later buyers. If the inspection points to big exterior repairs, the grant may help after you buy; if the house already had one, the easement comes with it. For repairs you would rather finance, see the guide to renovation loans for a historic home.
Joe Janus can go through the inspection reports with you and sort the in-kind repairs from the items that need HPO review before you send a repair request. Once the house is under contract, the next call is to your insurer: the guide to insuring a historic home in Arizona covers what to ask. Every step is part of buying a historic home in Phoenix, and houses with steel casements and masonry walls, like those in the Campus Vista Historic District, raise the window questions above.
Historic home inspection FAQs
What does an inspection for a historic home in Phoenix include?
Plan on a general home inspection plus a wood-destroying insect report, a camera scope of the sewer line and, for a house built before 1978, a lead-based paint inspection or risk assessment. Add asbestos sampling if a suspect material is damaged or you plan to remodel. Each is done by a different certified specialist.
Is the termite report the same as the home inspection in Arizona?
No. The wood-destroying insect inspection report, often called the Wood Infestation Report, is completed by an applicator certified in wood-destroying organism management, on a form approved by the Arizona Department of Agriculture. The home inspection is done by an inspector certified by the State Board of Technical Registration.
Who pays if the sewer line breaks under the yard?
The owner. In Phoenix you are responsible for the line from the house to the City main, and under City Code Section 28-5 the City repairs broken service lines only within the public right of way. That is why a camera scope before closing is worth booking.
Can a buyer waive the lead paint inspection on an older house?
Yes. Federal rules give buyers of pre-1978 housing 10 days for a lead-based paint inspection or risk assessment, and the parties can lengthen, shorten or waive it in writing. If you plan to repaint or repair windows, keeping the 10 days tells you what you are dealing with first.
What is the biggest red flag in a historic home inspection?
Water. Roots in the sewer line mean a repair that's yours on your side of the right of way, irrigation water standing against the foundation calls for re-grading, and moisture trapped behind cement stucco weakens adobe walls. Read the report for any sign of water first.
Do I need City approval to fix what the inspector finds?
Not for in-kind repairs. Painting, repairs and replacing materials with the same materials need no HP review, and neither does interior work. Exterior changes that need a building permit need a Certificate of No Effect or a Certificate of Appropriateness, with no City review fee.
How do I know a home inspector is certified in Arizona?
Ask for the certificate number. Arizona home inspectors are certified by the State Board of Technical Registration, after an exam, 84 hours of classroom training and 30 parallel inspections, and they must carry errors and omissions insurance or a bond before doing paid inspections.
Sources
- US EPA: Real Estate Disclosures about Potential Lead Hazards
- US EPA: Lead Renovation, Repair and Painting Program
- US EPA: Learn About Asbestos
- US EPA: Protect Your Family from Exposures to Asbestos
- City of Phoenix Water Services: General Service Issues
- City of Phoenix Water Services: FAQ
- Arizona Revised Statutes: 3-3601 Definitions
- Arizona Revised Statutes: 3-3633 Wood-destroying insect inspection reports
- Arizona Revised Statutes: 3-3632
- Arizona Revised Statutes: 32-122.02 Certification of home inspectors
- Arizona Senate: Committee of Reference Final Report, Arizona State Board of Technical Registration (2023)
- Salt River Project: How flood irrigation works
- Salt River Project: Residential Irrigation Owner's Manual
- City of Phoenix: General Design Guidelines for Historic Properties
- US Department of Energy: Energy Renovations, Insulation guide
- US Department of Energy: Energy Renovations, HVAC guide
- National Park Service: Preservation Brief 5, The Preservation of Historic Adobe Buildings
- City of Phoenix: Energy Efficiency in Historic Properties
- City of Phoenix: Projects Eligible for Certificates of No Effect (approved by HP Commission May 20, 2024)
- City of Phoenix: Historic Preservation FAQ
- City of Phoenix: Historic Preservation Approvals and Guidelines
- City of Phoenix: 2026 Exterior Rehabilitation Grant Program Guide