Both Villages Pay Up to $5,000 Toward Flood Control Installations — But Applications Are First-Come First-Served Starting May 1. Here’s Everything You Need to Know Before You Miss Out Again.
If your basement has flooded during a heavy rainstorm in La Grange or La Grange Park, you already know what it costs. The cleanup. The remediation. The ruined flooring, drywall, furniture, and appliances. The insurance claim that may or may not have been covered. The anxiety every time the forecast shows thunderstorms.
What most La Grange and La Grange Park homeowners don’t know is that both villages maintain active programs that reimburse up to 50% of the cost of permanent flood control installations — up to $5,000 for overhead sewer conversions and significant amounts for backwater valve installations. These programs exist specifically because the villages acknowledge that their combined sewer systems create flooding risk that affects private properties — and they’re willing to share the cost of protecting those properties.
Both programs open applications on May 1 each year and operate on a first-come first-served basis. Every year, homeowners who don’t know about these programs miss out on thousands of dollars in available reimbursement money. This guide makes sure you’re not one of them.
Understanding La Grange’s Combined Sewer Problem
Before diving into the grant programs, understanding what’s causing your basement to flood is essential — because it determines which solution qualifies for reimbursement and which approach will actually work.
The Village of La Grange operates a combined sewer system in which the sanitary and stormwater are combined into a single pipe. In heavy rain events, this system can surcharge which may result in sewer backups and standing water in depressional areas. That single sentence from the village’s own NPDES documentation explains why hundreds of La Grange basements flood every time a significant storm hits the western suburbs.
The combined sewer system serving La Grange’s older neighborhoods — particularly the streets east of La Grange Road, north of Ogden Avenue, and throughout the historic downtown residential areas — was designed for the precipitation patterns of the mid-20th century. Modern storm events regularly exceed that design capacity. When the pipes fill beyond capacity, the excess has nowhere to go except backward — through private sewer laterals and into the lowest fixtures in connected basements.
The Public Works Department is responsible for the operation and maintenance of the Village’s sewer and stormwater collection and conveyance systems, which include 72 miles of combined, storm, and sanitary sewers. The village regularly televises, cleans, and performs sewer lining on its infrastructure — but the public system’s capacity limits during major storms are a physical reality that maintenance alone can’t overcome. The permanent solution for homeowners is private flood control protection.
La Grange Park faces the same challenge. The majority of the Village of La Grange Park is served by a combined sewer system (CSO) which collects both domestic waste water and storm water runoff. La Grange Park awarded contracts in August 2025 for sewer cleaning and televising, sewer lining, point repairs, and a Kings Court/Castle Circle water main replacement including lead service line work — ongoing investments in public infrastructure that complement but don’t replace private flood control protection.
The La Grange Sewer Backup Prevention Grant — What It Pays
The Village of La Grange Sewer Backup Prevention Grant is one of the most generous flood control assistance programs in the western suburbs — and one of the least known.
What the program pays:
- Overhead sewer installation: Up to $5,000 reimbursement (50% of total cost)
- Backwater valve / flood control system installation: Up to $3,000 reimbursement (50% of total cost)
- Permit fees: Waived for qualifying installations
Who is eligible: Single-family and multi-family residential properties within the Village of La Grange corporate limits. Properties served by the South Lyons Sanitary District are excluded — check with the village if you’re not sure which district serves your address.
Critical requirements:
- Applications must be submitted and approved BEFORE work begins. Retroactive applications are not accepted — if you install a backwater valve and then apply for reimbursement, you will not be reimbursed. Apply first.
- Applications open May 1 each year on a first-come first-served basis. When the program budget is exhausted, no more applications are accepted for that fiscal year.
- Work must be performed by a licensed plumbing contractor who pulls all required permits
- An interactive property map on the village’s grant page shows eligible properties
How to apply: Visit the Village of La Grange’s Sewer Backup Prevention Grant page, verify your property is in the eligible zone, submit your application before scheduling any work, and wait for approval before proceeding. Contact the Village’s Public Works Department at (708) 579-2300 with questions.
The La Grange Park Sewer Backup Prevention Program — What It Pays
La Grange Park’s program mirrors La Grange’s in structure and is equally valuable for eligible homeowners.
As of May 1, applications are being accepted for the FY 2025-26 program. Applications must be submitted before work begins to be considered for reimbursement. Existing single-family, two-family, and multi-family homes (3+ units), and owner-occupied and rental properties, are eligible to participate in the program.
What La Grange Park’s program covers:
- Installation of a Flood Control System — a backflow prevention valve and bypass pump in an underground vault — with significant reimbursement toward the total cost
- Overhead sewer installation — the most comprehensive protection available
- Trenching and concrete floor replacement associated with eligible work
Critical requirements — same as La Grange: Applications must be submitted and approved before work begins. The program opens May 1 and is first-come first-served. Applicants must also disconnect any existing downspout or sump pump connections to the combined sewer system as a condition of eligibility.
Contact La Grange Park’s Public Works Department at (708) 354-0225 for current program details and to confirm your property’s eligibility before applying.
What These Programs Pay For — and Why You Need a Licensed Plumber
Both programs specifically require that qualifying installations be performed by licensed contractors who pull all required permits. This is where the connection to our work is direct: the installations these programs reimburse are plumbing installations, not landscaping or general contractor work.
Backwater valve / flood control system installation — a backwater valve installed in the main sewer lateral in the basement floor creates a one-way gate that allows normal wastewater to flow out and physically blocks sewage from flowing backward during a surcharge event. For homes with basement plumbing, the full flood control system includes an ejector pump bypass that allows basement fixtures to function even when the valve is closed during a storm. This is licensed plumbing work — it requires sawcutting the basement floor, accessing the main lateral, installing the valve assembly, and restoring the concrete.
Overhead sewer installation — the most comprehensive flood control solution available, rerouting all basement drain lines above the level of the city main so it’s physically impossible for sewage to back up into the home regardless of what happens in the combined sewer. For La Grange and La Grange Park homes that have flooded multiple times, overhead sewer conversion is the permanent answer. It costs more upfront — typically $12,000 to $25,000 depending on basement size and plumbing complexity — but with the village paying up to $5,000 back, the net cost is significantly reduced.
Our flood control services team is fully familiar with both La Grange and La Grange Park’s program requirements, specifications, and permit processes. We install to village-approved specifications, pull all required permits, and can help you navigate the application process before work begins to make sure you capture the available reimbursement.
The Full Picture: What Causes Flooding in La Grange and La Grange Park
Understanding the complete cause of your basement flooding determines what combination of solutions you need — and what will actually work long-term.
Combined sewer surcharge backup — sewage and stormwater entering through floor drains or basement toilets during heavy rain. This is the most common cause of basement flooding in both villages’ older neighborhoods. The right solution is a backwater valve or overhead sewer. A sump pump does not prevent surcharge backup.
Groundwater intrusion — water seeping through foundation walls or the floor slab during sustained rain or snowmelt, driven by hydrostatic pressure from saturated clay soil. This requires interior drainage and a sump pump system. La Grange’s South Basin neighborhoods south of 47th Street — which the village has identified as having the most significant flooding impacts — face elevated groundwater pressure during major events.
Surface drainage problems — water pooling near the foundation from negative grading, insufficient downspout discharge distance, or saturated soil that can’t absorb additional moisture. French drains and exterior regrading can address surface water before it reaches the foundation.
Many La Grange and La Grange Park properties experience all three simultaneously during major storm events — which is why a site assessment that identifies the specific sources of water entry is the essential first step before any installation.
The Sewer Lateral Picture in La Grange and La Grange Park
Beyond flood control, understanding the condition of your private sewer lateral is the most important piece of plumbing intelligence available for homes in both villages.
La Grange and La Grange Park have substantial housing stock from the 1920s through the 1960s — particularly in the blocks surrounding La Grange Road, Calendar Avenue, and throughout the historic residential streets near the Metra stations. Those homes have clay tile sewer laterals that are now 60 to 100 years old. In a combined sewer environment where root intrusion through failed clay tile joints is endemic, and where surcharge events put additional back-pressure on aging laterals during storms, the combination of deteriorating pipe condition and flooding risk creates a situation where a camera inspection delivers disproportionate value.
A sewer camera inspection shows you exactly what’s in your lateral — root intrusion, pipe belly, offset joints, structural damage — and informs both the immediate maintenance decision and the flood control design. A backwater valve installed in a lateral with significant root intrusion protects against surcharge backup but doesn’t address the underlying lateral condition that makes the pipe more vulnerable during high-flow events. Addressing both simultaneously — camera inspection, lateral maintenance or repair, and flood control installation — is the comprehensive approach.
What to Do Right Now
Step 1 — Mark May 1 on your calendar. Both La Grange and La Grange Park’s programs open May 1 on a first-come first-served basis. If you’ve flooded before and haven’t yet applied, set a reminder for April 30 to have your application ready to submit the moment the program opens.
Step 2 — Get a flood control assessment before applying. Both programs require applications to be submitted and approved before work begins. Having a licensed plumber assess your property and provide a written scope of work — specifying the type of installation, the cost, and what permits are required — is what you need to complete the application. Contact us at 708-801-6530 to schedule an assessment.
Step 3 — Confirm your property’s eligibility. Both villages have interactive maps and exclusion zones for their programs. Verify your address is eligible before investing time in the application process.
Step 4 — Apply before May 1 if late — apply immediately next cycle. If you missed this year’s program opening, the best move is to get the flood control assessment done now so you’re ready to apply the moment May 1 arrives next year. The assessment is the slow part — once you have a written scope from a licensed plumber, the application itself is straightforward.
Our sewer line repair and replacement team and flood control specialists serve La Grange, La Grange Park, and all of the western suburbs — and we’re fully familiar with both villages’ programs. For a complete breakdown of what flood control installations cost in the Chicago area before the village reimbursement, read our 2026 flood control cost guide — it covers every system type with real Chicagoland pricing.
Frequently Asked Questions: Flooding and Flood Control in La Grange and La Grange Park
When do La Grange and La Grange Park’s programs open?
Both programs open May 1 each year and operate on a first-come first-served basis until the annual budget is exhausted. Applications must be submitted and approved before work begins — retroactive applications are not eligible.
How much does La Grange reimburse for a backwater valve?
Up to $3,000 — 50% of the total cost of a qualifying backwater valve or flood control system installation. For an overhead sewer conversion, the reimbursement is up to $5,000. Permit fees are also waived. Contact the village at (708) 579-2300 to confirm current program amounts.
What’s the difference between a backwater valve and an overhead sewer?
A backwater valve is a mechanical device installed in the sewer lateral that prevents sewage from flowing backward into the home during surcharge events. It requires electricity and a functional valve to provide protection. An overhead sewer reroutes all basement drain lines above street level — making it physically impossible for sewage to back up regardless of what the combined sewer system does. Overhead sewer is more expensive and more invasive to install, but provides permanent protection without depending on any mechanical component.
My basement has flooded twice. Should I get a backwater valve or an overhead sewer?
Two basement floods from surcharge backup is a strong argument for overhead sewer — the only solution that eliminates the risk rather than managing it mechanically. With La Grange and La Grange Park both reimbursing up to $5,000, the net cost of overhead sewer is significantly reduced. We’ll assess your specific situation and give you an honest recommendation for what level of protection makes sense for your home and budget.
Can I apply for both villages’ programs if I live near the La Grange / La Grange Park border?
No — each program applies only to properties within that village’s corporate limits. Call your village hall to confirm which jurisdiction your property falls in before applying to either program.
Do I need a sewer camera inspection before applying for the flood control grant?
A camera inspection isn’t required by either program, but it’s strongly recommended before any flood control installation. The camera confirms the condition of your lateral and informs the installation design — particularly for overhead sewer conversions where the existing drain configuration needs to be mapped before rerouting work begins.
Need Flood Control in La Grange or La Grange Park?
We’re fully familiar with both villages’ grant programs and install to their specifications — so you capture the available reimbursement. Send us a message and we’ll get back to you fast.
Or call us directly: 708-801-6530 | Open 24/7
Serving La Grange & La Grange Park
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Suburban Plumbing Experts is based in Brookfield — a short drive from both La Grange and La Grange Park. We’re fully familiar with both villages’ grant programs and install to their specifications so you capture the available reimbursement.
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