Basement Waterproofing in Lombard, IL

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Lombard's mid-century ranches often have below-grade window wells that fill during heavy rain. Before paying for an interior system, ask whether a window-well drain, cover or regrading would solve it. For true wall or cove seepage, interior drain tile to a sump is the common long-term fix.

Wet basement or sewer backup? Know which one you have

Groundwater seeping through walls or the floor is a waterproofing problem (drain tile, sump pump, crack repair). Water coming up through a floor drain during heavy rain is often a sewer backup, which calls for backflow protection or an overhead sewer. Many Lombard homeowners need to know which before paying for a fix.

What Lombard offers homeowners

Lombard's Overhead Sewer Reimbursement Program covers 75% of pre-approved costs, up to $5,000, for overhead sewers, check valves and similar backup protection. You need two plumbing estimates and Village approval and a permit before work starts, and storm water such as drain tile must be disconnected from the sanitary sewer.

Terms from the official page linked below as published when we checked in October 2026. Confirm current funding and rules before work starts.

Housing in Lombard

About 44,476 people lived in Lombard in the 2020 Census. The median home there was built around 1971, and the biggest share of its housing went up before 1970 (48% before 1970, 26% from 1970–1989, 17% from 1990–2009, 8% since 2010). Roughly 55% of homes are detached single-family houses and 7% are townhouses or other attached single-family homes; about 71% of households own their home.

Older Lombard homes (48% pre-1970) are more likely to have block or poured walls with old clay drain tile and floor drains tied into the sewer. Several DuPage programs require disconnecting drain tile from the sanitary sewer and sending it to a sump pump — a common part of waterproofing jobs here.

Ask any waterproofing contractor for a written diagnosis of where the water is coming from, what they'll fix, and whether a village permit is needed.

Simple diagram: drain tile along the footing carrying water to a sump pump — Illustration for explanation only, not a photo of a real Lombard job.

Nearby areas

Elmhurst Glen Ellyn Addison Villa Park

Also see: cost guide · FAQ

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