Cleaning Older Homes in Portland, Maine

Nearly half of Portland's homes predate 1940. Here is how to look after Munjoy Hill buildings, West End homes and triple-deckers without damaging what makes them worth keeping.

Census estimates show about 46 percent of Portland housing units were built in 1939 or earlier, and the median home dates from 1946. Living in one of these homes usually means more trim, smaller rooms and a little more care. This guide covers what that care should look like.

How Portland's old buildings came to be

Greater Portland Landmarks says Munjoy Hill's buildings date mainly from the 1850s to the 1930s, including the rebuilding after Portland's Great Fire of 1866. The same organization describes the Western Promenade as a neighborhood of homes designed by noted Portland architects, alongside the historic park of that name.

Greater Portland Landmarks also notes that triple-decker buildings shaped how Portland families lived around 1900, and that many are now being converted or rediscovered as housing. So an old building here can be anything from a single family home to a set of small rental flats.

Lead paint comes first

Maine DEP says more than half of Maine homes may have lead paint, and that most lead poisonings in Maine come from dust from old lead paint, especially in buildings built before 1950. Treat paint in any old building with respect.

Sound paint is generally fine to wipe with a damp cloth. Sanding, scraping and dry sweeping are not, because they can spread dust. Old windows deserve particular attention, since friction wears on the paint. Wipe sills and wells with a damp cloth and dispose of the cloth afterward. If paint is flaking, have it looked at by a qualified professional, especially if young children live or visit there. Renters should report it to the landlord in writing.

Surface by surface

Most damage in old homes comes from too much water and too much abrasion, so go gently with both.

Water that is kind to old fixtures

One thing works in your favor. The Portland Water District reports an average hardness of 7.2 milligrams per liter as calcium carbonate, which is very soft, so old fixtures see little mineral crust. The district also raises the water's pH with sodium hydroxide to make it less corrosive.

That means strong acid cleaners are rarely needed, and that is good news for old chrome and porcelain. Use less soap, because soft water does not rinse it away as quickly, and film can build up on tile if you overdo it.

Winter in an old building

About 144 nights a year fall below freezing, and old buildings let you know about it. Dry heated air can shrink wood and open gaps that catch fine dust, and cold glass collects condensation on sills. Soft vacuuming and wiping sills on cold mornings are small habits that help a good deal. The winter cleaning guide goes further.

Sand and salt at the door are especially hard on old floors, so use good mats and keep shoes off the wood whenever you can.

How a professional visit should work

When TotalCare Cleaning comes to Greater Portland, a visit to an older home can begin with a quick walkthrough. Point out anything original or delicate, say what you have used in the past, and mark any rooms that are off limits. A One-Time Deep Clean is a good starting point, since baseboards, blinds, tracks and vents are where these homes hold their dust.

A Recurring House Clean then keeps things steady, and frequent light cleaning is kinder to old finishes than occasional heavy cleaning. If you have just bought or rented an old place, a Moving Clean adds the inside of the oven, refrigerator and cabinets while everything is empty.

More for Portland homes

Sources

  1. Census Reporter, ACS 2024 5-year tables B25034 and B25035: censusreporter.org/data/table/?table=B25034&geo_ids=06000US2300560545
  2. Greater Portland Landmarks, 10 facts about the proposed Munjoy Hill Historic District: www.portlandlandmarks.org/gplblog/2020/11/13/10-facts-about-the-proposed-munjoy-hill-historic-district
  3. Greater Portland Landmarks, Western Promenade neighborhood history: www.portlandlandmarks.org/documenting-western-promenade
  4. Greater Portland Landmarks, The Transforming Triple-Decker: www.portlandlandmarks.org/gplblog/triple-decker
  5. Maine Department of Environmental Protection, Lead: www.maine.gov/dep/waste/lead/
  6. Portland Water District, 2026 Annual Water Quality Report (2025 data): www.pwd.org/publications/2026-water-quality-report/
  7. NOAA NCEI, 1991-2020 Climate Normals, Portland International Jetport: www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/access/USW00014764.csv
FAQ · Older and historic homes

Frequently Asked Questions

The questions Portland homeowners ask most often about this topic, answered plainly.

If the building predates 1978, assume it may, and especially if it was built before 1950. Maine DEP says more than half of Maine homes may have lead paint. A qualified inspector can test it. Until then, keep paint in good condition, wipe sills with a damp cloth, and do not sand or scrape.
Avoid oil soaps that leave a film, silicone sprays and anything abrasive. Homes from the 1850s to the 1930s can have finishes that react badly to modern products. A slightly damp cloth, dried right away, handles most dust. Test anything else in a hidden spot before using it more widely.
Yes, with a barely damp mop and a mild cleaner, after you have swept or vacuumed. Avoid steam mops and standing water, which can lift finish and seep between boards. In Maine, sand and salt are the bigger threats, so mats at the doors and shoes off make the greatest difference.
Not in everyday housekeeping. The Portland Water District reports very soft water and raises its pH to make it less corrosive. If you are concerned about what is in your old plumbing, contact the district directly. For fixtures, mild cleaners are enough, since mineral crust is rarely a problem.

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