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Downspout installation cost

By Gutter Report Editorial. Last reviewed August 2026. How we research this.

In brief

One downspout costs $30 to $75 installed, per HomeGuide. That price covers a 10 to 15 foot section, the elbows, the outlet and the straps. A house needs four or five of them, and HomeGuide's whole house total is $220 to $625. Other publishers price the same work much higher. Angi's average project is $670. Fixr's is $1,527. Per foot the spread is wider still: HomeGuide says $2 to $4, Thumbtack says $5 to $18, Angi says $6.50 to $22.25, and Fixr says $15 to $28. Nobody is lying. They survey different contractors and they count different things. Use the low end for a plain aluminum add-on and the high end for copper, a third story, or a job with trenching in it. Adding one downspout to a gutter that spills over is often the cheapest real fix on the house. This page also says when it is not.

Three dark formed-metal downspout elbows stacked at angles on a dark surface under a single hard light.

1.0What a downspout job costs

Start with the whole job, because that is what a quote will be for. Three publishers price it three ways, and their middle estimates run from $400 to $1,527.

ScopeCostSource
One downspout, installed$30 to $75HomeGuide
Whole house, four to five downspouts$220 to $625HomeGuide
Project average$670Angi
Project typical range$315 to $1,070Angi
Project low and high$100 to $3,265Angi
Project average$1,527Fixr
Project average range$1,099 to $2,000Fixr
Project low and high$103 to $9,464Fixr

Fixr's high end is twelve copper downspouts on a large house, which pulls its top number up. Angi's typical range came off a widget that may adjust by area, so treat that band as softer than the $670 average beside it. HomeGuide's $220 to $625 is the tightest of the three and also the lowest.

Fixr is the only publisher that shows its work, so its worked jobs are the most checkable numbers here.

Fixr worked jobCostSource
Four vinyl downspouts, 12 ft each, do it yourself$103 to $187Fixr
Six galvanized downspouts, 12 ft each, installed$454 to $1,765Fixr
Six aluminum downspouts, 12 ft each, installed$541 to $2,289Fixr
Twelve copper downspouts, 12 ft each, installed$2,961 to $9,019Fixr
Four aluminum downspouts, 12 ft each, installedabout $768Fixr

That last row is the useful one. Four downspouts of 12 feet is 48 feet of pipe, so $768 is $16.00 per foot. We did that division, so call it derived, not measured. It sits inside Fixr's own $15 to $28 band and inside Angi's $6.50 to $22.25, and it is four to eight times HomeGuide's $2 to $4.

Downspout size follows gutter size, so the two decisions are one decision. If the run is 6 inch the outlets and the pipe both step up with it, and how many you need is set by roof area rather than by the length of the gutter. Material matters here too: aluminum and copper downspouts are priced nothing like each other.

2.0Cost per foot, and why the sources are so far apart

Contractors also quote by the foot. Here is every per foot figure we read at its source.

PublisherPer foot, installedNote
HomeGuide$2 to $4Vinyl and aluminum
Thumbtack$5 to $18Does not say if labor is in it
Angi, downspout page$6.50 to $22.25National range
Fixr$15 to $28Oldest of the four, January 2025
Fixr, labor only$7.43 to $13.51Downspout labor rate
Angi, gutter install page$5 to $8Vinyl and aluminum. Conflicts with Angi's own downspout page
HomeGuide$10 to $34Copper or zinc

Two things stand out. Angi contradicts itself: its downspout page says $6.50 to $22.25 per foot and its gutter installation page says $5 to $8 for the same vinyl and aluminum. Cite the page the number came from. And HomeGuide is not an outlier by accident, because its material table agrees with its own headline. Do not average these four. An average of $2 and $28 describes no real job.

By material, the same gap shows up again, at every material.

MaterialHomeGuideAngiFixr
USD / FTUSD / FTUSD / FT
Vinyl or PVC$2 to $3$6 to $12$5.79 to $10.53
Aluminum$3 to $4$7 to $30$7.52 to $31.79
Galvanized steel$5 to $11$7 to $22$6.31 to $24.51
Copper$14 to $34$23 to $68$20.56 to $62.63
Seamless$5 to $16not pricednot priced
Galvalume$6 to $10not pricednot priced
Zinc$10 to $19not pricednot priced

Angi and Fixr land close to each other on all four shared materials. HomeGuide sits far below both every time. If you are sanity checking a quote, HomeGuide is the floor and Fixr is the ceiling, and a fair aluminum quote can honestly sit anywhere between them.

Size moves the price too. Angi puts a 2 by 3 inch downspout at $6 per foot, a 3 by 4 inch at $8, and a 4 by 5 inch at $11. No other source we read prices by cross section, so that stands on one publisher alone.

3.0Materials against labor

HomeGuide is the only publisher that splits a single downspout into parts and time.

LineCost per downspoutSource
Material, 10 to 15 ft section with elbows, outlet and straps$10 to $30HomeGuide
Labor, including removing the old one$20 to $45HomeGuide
Total, installed$30 to $75HomeGuide
Labor as a share of the project20% to 50%Angi
Prep work as a share of the project2% to 20%Angi
Handyperson hourly rate$37 to $68Fixr
Handyman hourly rate$50 to $80HomeGuide

Look at HomeGuide's own split. Labor of $20 to $45 inside a total of $30 to $75 is about 60 to 67 percent of the job, well above the 20 to 50 percent Angi reports. And an hour of handyperson time is $37 to $68 at Fixr, which on its own eats most of HomeGuide's total. That is the clearest sign HomeGuide's numbers assume a downspout swapped while a crew is already on site for something else.

Height is the other big mover. HomeGuide prices the same four to five downspout job three ways.

House heightWhole job, four to five downspoutsSource
One story, 10 to 15 ft$120 to $375HomeGuide
Two stories, 18 to 25 ft$220 to $625HomeGuide
Three stories, 26 to 35 ft$315 to $875HomeGuide

One story to three stories is about 2.3 times. Angi describes a smaller effect: up to 50 percent more when a tall job needs a crane or a lift. Both agree height costs money. They do not agree how much.

4.0How many downspouts a house needs

This is the number that moves your total more than any material choice, and it is the number the sources agree on least. Here is the full spread.

SourceRuleDownspouts on 180 ft of gutter (derived)
Amerimax (Euramax) catalogOne per 20 ft of gutter9
FixrOne per 20 to 30 ft6 to 9
HomeGuideOne per 30 to 40 ft, four to five per house5 to 6
AngiOne per 30 to 40 ft, two to four per house5 to 6
ThumbtackOne per 35 ft6
Copper Development Association50 ft of gutter per downspout, maximum4
Berger, via Gutter Supply50 ft practical maximum4
This Old HouseA run of 60 ft or more needs at least two outlets3
This siteOne per 40 ft (derived, our pick)5

The last column is our arithmetic on each source's own rule, rounded up. It is derived, not published by any of them.

The two ends are not answering the same question. Amerimax makes downspouts, and its 20 foot rule is drainage advice. Berger says plainly that its 50 feet is a limit on thermal expansion in the gutter, not a limit on water. This site uses 40 feet, the top of the band HomeGuide and Angi publish and under the 50 foot cap from the CDA and Berger, and labels it derived because that is what it is.

What that costs you: at HomeGuide's $30 to $75 each, three downspouts is $90 to $225 and nine is $270 to $675. That is our arithmetic again. The count, not the metal, is where the money on a small job goes. So when you read a quote, check how many downspouts it includes before you check anything else.

How a pro sizes a downspout, and where consumer guides get it wrong

Effective area, the 7 square inch rule, roof pitch factors

The common rule of thumb is one square inch of downspout for every 100 square feet of roof. Texas A&M AgriLife Extension publishes it. This Old House publishes it. It is easy and it is conservative for most of the country.

From that rule, published capacities follow. Texas A&M gives 600 square feet of roof for a 2 by 3 inch downspout and 1,200 for a 3 by 4. This Old House gives 706 square feet for a 3 inch round and 1,255 for a 4 inch round, and Modernize publishes the same four figures.

Here is the catch. Those numbers use the geometric area of the pipe. The SMACNA method uses an effective area that is smaller, because a pipe does not flow full. The NorthClad sizing calculator's source code lists 4.8 square inches effective for a 2 by 3 against 6.0 geometric, and 10.31 for a 3 by 4 against 12.0. For plain round it lists 5.94 square inches at 3 inches, 11.04 at 4 inches, 17.71 at 5 inches and 29.95 at 6 inches. Corrugated round is derated further, to 25.97 at 6 inches. So a guide using geometric area overstates what a downspout can drain: about 20 percent on a 2 by 3, about 14 percent on a 3 by 4, and roughly 14 to 16 percent on round pipe.

The Copper Development Association's own table gives 6.00 square inches for a 2 by 3, 12.00 for a 3 by 4, 20.00 for a 3.75 by 4.75 and 24.00 for a 4 by 6. It also says no downspout should be under 7 square inches except on porches and canopies. Read those two lines together and the standard residential 2 by 3 downspout does not qualify. That is a real conflict between an architectural standard and normal house building, and we print it rather than smooth it over.

Roof pitch adds area. The CDA's factors are 1.00 for level to 3 in 12, 1.05 for 4 to 5, 1.10 for 6 to 8, 1.20 for 9 to 11, and 1.30 at 12. This Old House publishes the identical set. Berger's worked example runs the whole chain: a 100 by 85 foot Boston building, 8,500 square feet of plan area, a 1.10 pitch factor giving 9,350 square feet of design area, four downspouts at 2,338 square feet each, divided by Boston's factor of 170 square feet per square inch, which calls for at least 13.75 square inches and lands on 5 inch downspouts. (The source prints 13.56 there. The division gives 13.75.)

Plumbing codes are far more generous than any of this, because they are stated at one inch of rain per hour. The IPC's vertical leader table gives a 3 inch leader 92 gallons per minute, a 4 inch 192, a 5 inch 360 and a 6 inch 563. The 1997 Uniform Plumbing Code allows 6,440 square feet of roof on a 3 inch pipe, 13,840 on a 4 inch and 25,120 on a 5 inch, all at one inch per hour. Berger's per square inch allowances at the same intensity are 911 square feet at 3 inches rising to 1,750 at 8 inches, and multiplying those out reproduces the UPC table almost exactly. Codes are adopted and amended locally, so ask your building department what governs before treating any of it as a requirement where you live.

Last, a fit rule that decides the answer for most houses. A downspout outlet cannot be wider than the bottom of the gutter. A 5 inch K-style gutter has a bottom about 3 and 3/8 inches wide and a 6 inch has about 3 and 7/8 inches (our measurement from a sheet metal submittal, so derived). Amerimax states the practical result directly: 5 inch gutters take a 2 by 3 or a 3 by 4, and 6 inch gutters take a 3 by 4 only. Amerimax also calls for two bands per 10 feet of downspout, and Berger adds that an offset of more than 10 feet hurts drainage and that conductor heads belong every 40 feet.

5.0Elbows, extensions and the small parts

A downspout is a pipe plus a few parts. The parts are cheap, and knowing the prices keeps a line item on a quote from looking strange.

PartCost eachSource
Flexible elbow$3 to $4HomeGuide
Rigid elbow, A style or B style$4 to $8HomeGuide
Rigid elbow$4 to $8This Old House, from Home Depot pricing
Splash block$5 to $15HomeGuide
Splash block$6 to $66This Old House
Vinyl drain sleeve extension$5 to $20HomeGuide
Extension, installed$40 to $150Thumbtack
Extension, part only$2 to $17Fixr
Y shaped or bi-feed diverter$50 to $80HomeGuide
Bi-feed diverter, plus installation$11 to $176Fixr
Downspout screen or strainer$5 to $15HomeGuide
Downspout screen$8HomeAdvisor and Thumbtack
Downspout screen$3 to $27Fixr
Hangers and brackets$2 to $17This Old House
Painting or color matching, per foot$1 to $4HomeGuide

Elbows are the one part everyone agrees on: HomeGuide and This Old House both say $4 to $8 for a rigid elbow, and This Old House read that off Home Depot. Screens cluster at $3 to $15 across four publishers, with Fixr's $27 as the ceiling. Diverters agree at neither end, so ask which kind a quote means.

Counter prices for the pipe itself

Home Depot, Seamless Gutter Supply and Classic Gutter Systems, read 2026-08-21

These are listed prices for a 10 foot section, read at the seller on 2026-08-21. They are material only. Home Depot prices were live at some stores and blank at others on the same day, so treat them as a sample rather than a national price.

Section, 10 ftPriceSeller
Aluminum 2x3, .0145 in.$19.98Home Depot (Amerimax)
Aluminum 2x3, .019 in.$28.98Home Depot (Amerimax)
Aluminum 2x3, .019 in.$21.06Seamless Gutter Supply
Aluminum 3x4, .0175 in.$22.98Home Depot (Amerimax)
Aluminum 3x4, .019 in.$30.64Seamless Gutter Supply
Aluminum 3x4, .024 in.$79.98Home Depot (Amerimax)
Aluminum 3 in. round, .019 in.$48.98Home Depot (Amerimax)
Aluminum 3 in. round, .019 in.$34.65Classic Gutter Systems
Galvalume 3 in. round, 26 ga.$34.65Classic Gutter Systems
Copper 2x3, 16 oz.$173.15Home Depot (Amerimax)
Copper 2x3, 16 oz.$125.52Seamless Gutter Supply
Copper 3x4, 16 oz.$365.43Home Depot (Amerimax)
Copper 3x4, 16 oz.$166.91Seamless Gutter Supply
Copper 3x4, 12 oz. corrugated$132.55Classic Gutter Systems

Two lessons sit in that table. Thickness moves aluminum pricing more than size does: the same 3 by 4 downspout is $22.98 at .0175 inch and $79.98 at .024 inch, three and a half times, at one seller on one day. And copper pricing is wild. A 3 by 4 copper section is $365.43 at Home Depot and $166.91 at Seamless Gutter Supply, less than half, for the same stated size and weight. Classic Gutter Systems lists $132.55, but that item is 12 ounce copper rather than 16, so part of its gap is real weight and part is not. Three sellers, three very different numbers, and we are not averaging them.

Gauge is set by the maker. Amerimax's catalog lists 2 by 3 aluminum downspouts at .0145, .0175, .019 and .024 inch, and 3 by 4 at .0175 and .024. Englert's specification calls for .019 inch aluminum in alloy 3105-H24 at both sizes. Berger's catalog uses .019 for 3 inch round and steps up to .024 for 4, 5 and 6 inch round.

How long they last: the National Association of Home Builders puts aluminum downspouts at 30 years and copper downspouts at 100. That NAHB study rates downspouts 10 years longer than the gutters they drain, and no other source we read separates the two.

6.0Burying the downspout: the biggest disagreement here

Running a downspout underground is the most expensive thing on this page, and the sources are not close.

ScopeCostSource
Per downspout buried, with catch basin, pipe and bubbler$150 to $350HomeGuide
Per foot of buried run$15 to $35HomeGuide
Per foot of buried run$25 to $50Thumbtack
Added per foot over a standard downspout$3 to $8Angi, downspout page
One downspout extension, underground$800 to $2,000Angi, drainage page
Two extensions$1,200 to $2,200Angi
Three extensions$1,800 to $3,000Angi
Four extensions$2,400 to $3,400Angi
Six extensions$3,600 to $5,700Angi
Bubbler outlet$30 to $85HomeGuide
Catch basin extension kit, parts$20 to $65HomeGuide
Rain barrel kit, parts$50 to $200HomeGuide
Dry well$300 to $1,500HomeGuide, drainage table
Dry well, gravel or plastic tank$50 to $700HomeGuide, dry well section

Four downspouts buried is $600 to $1,400 by HomeGuide's per downspout figure and $2,400 to $3,400 by Angi's table. Angi is two to four times higher for the same work. We cannot tell you which is right, so get the trench length, the pipe size and the outlet type written on the quote and compare like for like.

Angi's $3 to $8 per foot needs a warning of its own. It cannot be squared with Angi's own $800 to $2,000 for a single extension. The $800 low end alone would need 100 to 267 feet of pipe at $3 to $8 a foot. Read it as the extra over an above ground extension, not as the whole cost. HomeGuide also disagrees with itself on dry wells, listing $300 to $1,500 in one table and $50 to $700 in another section on the same site.

7.0When you do not need a new downspout system

We do not sell gutters and we do not install them, so here is the part that costs us money to write. Most people who land on this page after watching a gutter spill over do not need a new downspout system. They need one of four smaller things.

A clog. Water going over the front edge in every storm is usually debris, not design. Clearing a clogged downspout during a cleaning is $50 to $100 at Angi and at Fixr, and $60 to $150 at HomeGuide. Fixr adds that if the downspout is not clogged, clearing it is already inside the flat cleaning price. That is the cheapest possible answer and it is the first one to rule out.

A loose downspout. A pipe swinging off the wall is straps. HomeGuide puts handyman work like that at $50 to $80 an hour, and Fixr's handyperson rate is $37 to $68. Amerimax calls for two bands per 10 feet of pipe, which is a thing you can count from the ground.

A damaged section. You do not have to replace a whole run. HomeGuide prices replacing a section of aluminum or vinyl downspout at $3 to $5 per foot and seamless at $6 to $17. Fixr instead quotes downspout repair flat, at $20 to $100 per repair.

One more downspout. This is the big one. If a long gutter run spills at the same spot every storm, the run is draining more roof than one outlet can take. Fine Homebuilding's rule says a second downspout doubles what that section can drain. HomeGuide prices adding a downspout to a gutter you already have at $2 to $4 per foot, and a full installed downspout at $30 to $75. Against a whole gutter replacement, that is the cheapest real fix available to you.

Three things do point the other way. Rotted fascia behind the gutter, because nothing you hang will hold. A gutter that is simply too small for the roof, which is a gutter problem and not a downspout problem. And copper or zinc, where the price of matching a single new piece to an aged run can cost more than the fix is worth. See gutter repair cost and gutter replacement cost for those cases, or run your own footage through the cost calculator.

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Common questions

How much does it cost to install one downspout?

HomeGuide puts one downspout at $30 to $75 installed. That splits into $10 to $30 of material for a 10 to 15 foot section and $20 to $45 of labor. Angi does not price a single downspout. Its whole project runs $315 to $1,070 with a $670 average, which is a lot more per downspout on a four or five downspout house. Both numbers are real. They are measuring different jobs.

How many downspouts does a house need?

The sources genuinely disagree. Amerimax says one downspout per 20 feet of gutter. The Copper Development Association and Berger both say 50 feet. This Old House says a gutter run of 60 feet or more needs at least two. Fixr says one per 20 to 30 feet. HomeGuide and Angi say one per 30 to 40 feet. This site uses 40 feet. That is the top of the band HomeGuide and Angi publish and well inside the 50 foot cap from the CDA and Berger. It is our pick, not a published figure.

Is adding a downspout cheaper than replacing the gutters?

Almost always. HomeGuide prices adding a downspout to a gutter you already have at $2 to $4 per foot, and a whole installed downspout at $30 to $75. A full gutter replacement is a far bigger job. If your gutter only overflows at one spot in heavy rain, the added downspout is the fix worth pricing first.

What does it cost to bury a downspout underground?

The two best sources are far apart. HomeGuide says $150 to $350 per downspout buried, including a catch basin, pipe and a bubbler. Angi says $800 to $2,000 for one extension and $2,400 to $3,400 for four. At one downspout Angi is about five times HomeGuide at the low end, and on a four downspout job Angi is two to four times higher. Get the trench length and the pipe run in writing before you compare any quote to either.

Why do the per foot prices vary so much?

Because the publishers count different things. HomeGuide says $2 to $4 per foot for vinyl and aluminum. Fixr says $15 to $28 per foot. That is a gap of four to ten times, and it is not a typo: the HomeGuide material table agrees with the HomeGuide headline. Read the per foot rate as a rough sort, then price the job by the downspout.

Rev
RevAugust 2026
Source
SourceHomeGuide, Angi, Fixr, Thumbtack, Copper Development Association (read 2026-08-21)