Are Olde Town homes harder to remediate?

They can be. Masonry foundations, plaster walls, small cellars and tight access add steps, and older materials are more likely to need testing before removal. Ask whether the contractor has worked in homes of that age.

Is a 1970s split-level lower level a basement?

For moisture purposes, yes. The lower level sits partly below grade against soil, so it collects groundwater and condensation like a basement does. When it is finished as a family room, damp walls are easy to miss behind paneling.

Do creeks in Arvada affect homes far from them?

Usually only indirectly. Most basement water in the area comes from local runoff, gutters and grading. Homes on low ground near a creek or ditch are the ones most affected by higher groundwater.

South Arvada and Ralston Creek: Basement Mold by Home Age

Housing eras and their weak points

A rough guide to how construction changed, and what each era tends to bring to a mold job.

Early 1900s to 1930s: Homes near Olde Town with brick or stone foundations, small cellars and crawlspaces. Masonry seepage and damp floor framing are common.
1950s to 1960s: Ranches across south Arvada, many over crawlspaces or partial basements. Crawlspace humidity, duct condensation and old plumbing.
1970s: Split-levels and bi-levels with lower levels partly below grade, often finished with paneling and carpet that hides moisture.
Recent infill: Townhomes and rebuilt lots near Olde Town and transit, with tighter construction and upstairs laundry.

Creeks, ditches and drainage

Ralston Creek runs through Arvada near Olde Town, and Van Bibber Creek and several irrigation ditches cross other parts of the city. As in Wheat Ridge, the land generally falls toward these channels, so homes in the low areas near them collect more runoff and can sit closer to groundwater.

Arvada spans two counties, Jefferson and Adams, but the south Arvada neighborhoods nearest Wheat Ridge are in Jefferson County. For permits, the City of Arvada is usually the contact for homes inside city limits, while some nearby pockets remain unincorporated.

Checks for south Arvada homes

In older Olde Town area homes, look at cellar walls and the framing above them
In 1950s ranches, inspect the crawlspace liner and duct insulation
In 1970s split-levels, check behind paneling on the lower-level exterior walls
Confirm downspouts discharge away from the house and not toward a neighbor
If you are near a creek or ditch, check whether the lot is in a mapped floodplain

Contacts

Permits inside city limits: City of Arvada
Unincorporated pockets: Jefferson County
Historic district questions: Ask the City of Arvada about Olde Town
Gas emergencies: Xcel Energy or 911

Map of South Arvada. It shows an area, not an office or a job site.

Common questions

Are Olde Town homes harder to remediate?: They can be. Masonry foundations, plaster walls, small cellars and tight access add steps, and older materials are more likely to need testing before removal. Ask whether the contractor has worked in homes of that age.
Is a 1970s split-level lower level a basement?: For moisture purposes, yes. The lower level sits partly below grade against soil, so it collects groundwater and condensation like a basement does. When it is finished as a family room, damp walls are easy to miss behind paneling.
Do creeks in Arvada affect homes far from them?: Usually only indirectly. Most basement water in the area comes from local runoff, gutters and grading. Homes on low ground near a creek or ditch are the ones most affected by higher groundwater.

General information for Wheat Ridge, not a quote or professional advice. In an emergency, call 911.