Gutter cleaning is the single most-skipped home maintenance task — and the one that quietly causes the most expensive damage. A clogged gutter doesn't just overflow. It redirects thousands of gallons of roof runoff into places it was never meant to go: under shingles, behind fascia, down siding, and against the foundation. Below is what tends to break when gutters get neglected, with typical U.S. repair costs based on HomeAdvisor, Angi, and Fixr data (2024–2025).
*Cost ranges are national averages; expect 20–40% higher in HCOL metros.*
1. Rotted fascia and soffit — $600 to $6,000+
When gutters overflow, water runs down behind them and saturates the wood fascia board they're nailed to, plus the soffit underneath. Painted wood looks fine for a while, then suddenly soft. Replacing a few feet of fascia and soffit runs $20–$45 per linear foot installed, so a single bad corner is $600–$1,200. A full wraparound on a typical 2,000 sq ft home can hit $3,000–$6,000.
The frustrating part: fascia rot usually goes hand-in-hand with gutter replacement, because the gutters fall off when the wood behind them fails.
2. Foundation cracks and basement leaks — $2,000 to $25,000+
This is the big one. Clean gutters dump water 4–6 feet from the foundation through downspouts. Clogged gutters dump it directly against the foundation wall. Over a few seasons, that water erodes the soil, freezes and expands in the cracks, and eventually opens hairline cracks into structural ones.
- Sealing a minor foundation crack: $250–$800
- Interior basement waterproofing with a French drain: $3,000–$15,000
- Exterior excavation and waterproofing: $10,000–$25,000+
- Full foundation repair (piering, underpinning): $10,000–$40,000
Insurance generally does not cover foundation damage caused by gradual water intrusion, which is exactly what a clogged gutter produces.
3. Roof damage and shingle rot — $400 to $12,000+
Water that can't drain backs up under the lowest course of shingles. On flat-slope roofs and in cold climates, this is also how ice dams form in winter. Once water gets under shingles, it rots the roof decking (the OSB or plywood underneath).
- Replacing a few rotted decking panels: $400–$1,500
- Partial roof repair: $1,500–$4,000
- Full roof replacement on an asphalt-shingle home: $6,000–$12,000+
A roof rated for 25 years can lose 5–10 years of life from chronic gutter overflow.
4. Mold remediation — $1,500 to $9,000
Water that reaches the basement, attic, or wall cavities feeds mold within 24–48 hours. A small remediation job (a single wall or a corner of a basement) starts around $1,500. Whole-basement or whole-attic remediation commonly runs $3,000–$9,000, and you'll pay it out of pocket — most policies exclude mold caused by long-term moisture.
5. Siding damage — $800 to $15,000
Constant overflow streaks siding, lifts paint, warps vinyl, and rots wood and engineered siding (LP SmartSide, hardboard). Repairs:
- Repainting a damaged section: $800–$2,500
- Replacing a wall of vinyl siding: $1,500–$4,000
- Replacing rotted wood or engineered siding: $4,000–$15,000
6. Landscaping erosion and dead plantings — $300 to $3,000
Concentrated runoff carves channels through mulch beds, kills foundation plantings, and washes out grass right along the drip line. Re-grading, fresh sod, mulch, and replacement shrubs typically run a few hundred dollars per affected zone, more if you need a French drain or dry well to fix the underlying drainage.
7. Driveway and walkway cracking — $500 to $5,000
Water pooling at the base of downspouts erodes the soil under concrete and asphalt. Sections settle, crack, and heave — especially through freeze-thaw cycles. Mudjacking a sunken slab is $500–$1,500; replacing a section of driveway is $2,000–$5,000.
8. Pest infestations — $300 to $3,000+
Standing water in clogged gutters is a perfect mosquito nursery. Wet, rotting fascia is a magnet for carpenter ants and termites. Once they're in the structure, you're paying for a treatment contract ($300–$1,500/year) plus carpentry repairs that often run $1,500–$3,000+.
The math
A professional gutter cleaning runs **$100–$250** twice a year. Doing it yourself costs a Saturday morning. The cheapest single repair on this list — a small fascia patch — is roughly **5× a year's worth of cleanings**. A finished-basement waterproofing job is **30–60×**. A new roof is **40–80×**. There's almost no maintenance task in the home with a better cost-of-prevention-vs-cost-of-repair ratio.
When to clean
The minimum is twice a year: late spring (after pollen and seed pods drop) and late fall (after leaves drop). Add a third cleaning if you have pine trees, oaks, or anything tall directly over the roof. After major storms, check downspouts for blockages.
A printable version
We made a printable seasonal checklist that includes gutter cleaning at the right cadence for your climate, plus everything else your home needs across the year. Grab the free PDF here.
What Nuvelo does with this
Nuvelo learns your home — its gutter footage, surrounding trees, climate, and roof type — and reminds you to clean gutters at the right week, not a generic "do this in October." It also tracks the downstream tasks that depend on it: downspout extensions, splash blocks, and foundation drainage. Join the waitlist to get early access.