Search thousands of topics on CostHelper

BROWSE ALL TOPICS >> babies & children  cars  consumer electronics health & personal care home & garden personal finance  pets  schools small business sports weddings
CostHelper > Home and Garden  > Driveways, Pools & Outdoor Living > Downspout Extension

Downspout Extension Cost


How Much Does a Downspout Extension Cost?

 
low costLow: Simple Extensions $10-$50average costMedium: DIY Pipes $20-$400high costHigh: Installed $200-$2,000+

A downspout that discharges water from rain gutters right next to the foundation can cause serious problems, including flooding under the house or in the basement. Downspout extensions can range from a simple extension to much less visible systems where downspouts disappear underground into pipes (sometimes called French drains) that discharge water aboveground a considerable distance away, into the public storm drain system, or into an environmentally friendly underground holding tank (called a drywell).

Typical costs:

  • Simple aboveground downspout extensions going out 3-25 feet are about $10-$50 each depending on length and type; the more expensive ones contract, roll up or swing out of the way, and some automatically extend themselves again when water gushes through them. Or for about the same cost, you can buy a length of downspout pipe that matches your existing downspout plus a gutter elbow to create your own extension. Having a handyman install this type of simple extension should take about an hour, and could cost $30-$100, depending on local rates.
  • The other option is to extend the downspout underground into plastic pipes that will either disperse the water aboveground at a distance from the home, into a small tank or drywell buried underground, or into an underground "energy dissipation basin," often called a French drain. Prices will vary considerably depending on the type and size of the system and the length of piping used. Although a simple underground downspout kit[1] starts at $20, total do-it-yourself costs (including piping) can range from $100-$400 or more. ThisOldHouse.com estimates that do-it-yourself installation[2] of underground plastic drainage pipe for two downspouts on an average-size home could cost $100-$300 and take 16-20 hours, depending on the length of the pipe and the hardness of the soil.
  • Professional installation (typically by a landscaper) of underground drainage pipes can range from $200-$2,000 or more depending on the amount of trenching and the size of the system. A New York homeowner[3] paid $250 to have a landscaper extend a downspout through an underground pipe and into a small drywell located four feet from the house, while Galtech.com reports that professionally installed French drains[4] cost $850 for 33 feet.
Related articles: Gutters, Gutter Cleaning, Basement Waterproofing

What should be included:
  • Most premade downspout extensions come with simple instructions and are relatively easy to install. Just make sure it's firmly attached so a gush of storm water won't remove the extension. To create your own downspout extension to match your existing downspout, DoItYourself.com provides basic instructions[5] for this relatively simple project.
  • Underground drainage pipes are commonly 4 inches in diameter and installed about 10-12 inches deep, although this may vary depending on circumstances such as the slope of the land and soil conditions. SoundHome.com illustrates the design for a typical downspout-to-French drain[6] system; Readers' Digest explains when it's a good idea to extend your downspout into an underground drywell.
  • Call your local utility company before you dig, to make sure you won't be cutting into a power line. Also check with the local planning department before doing any extensive changes to downspouts; some communities have strict rules about where downspouts can drain (at least 5 feet from the house) or how they are connected to the public storm drain system. And make sure in advance that any drainage pipes won't cause flooding problems in a neighboring yard. Tip: Take pictures when installing underground pipes, so years from now you'll have a transferable visual record of where they are.
Shopping for a downspout extension:
  • Simple above-ground downspout extensions are available in most hardware and home improvement stores. Major manufacturers include Amerimax[7] and Rainguard[8] .
  • Manufacturers of lightweight plastic drywells include NDS (Flo-Well)[9] and Cultec[10] .
  • Typically, professional installation to extend a downspout underground would be done by a landscaper or a handyman with landscaping/drainage experience. Ask for referrals at your local nursery or home improvement center, or ask neighbors and friends for recommendations, or whether they've solved similar drainage problems.
post Post    
CostHelper News


7 Tricks To Make Home Appliances Last Longer
Give your household equipment a little workout now and then, to make sure anything mechanical will perform well when needed. Periodic exercise can extend the usable life of many items. || Posted October 14 2013


5 Important Things to Know Before a Tornado Hits
This week the Midwest has been battered by tornados, which are one of the most violent and destructive type of storms nature has in its arsenal. || Posted November 19 2013

‣ All CostHelper Blog Posts


What People Are Paying - Recent Comments


 

Comment On Your Experience With a Downspout Extension
 
Subject:  *
Amount Spent:  *
Type: Length: 
Comments: 
Purchased:  Year: 
City:  * State:  *
 
Information about you:
Email:  * Email addresses are not displayed.
Name:  This is the name we'll display with your post.
me on this computer
*=required field.
 



External Resources:
  1.  waterproof.com/downspouts.html
  2.  www.thisoldhouse.com/toh/how-to/intro/0,,20190189,00.html
  3.  www.city-data.com/forum/long-island/524886-waterproofing-basement.html
  4.  www.galttech.com/research/household-DIY-tools/french-drain-installation.php
  5.  www.doityourself.com/stry/extendadownspout
  6.  www.soundhome.com/article/downspout-drain-systems
  7.  www.amerimax.com/
  8.  www.rainguardusa.com/
  9.  www.ndspro.com/drainage-systems/dry-wells/flo-well-dry-well
  10.  www.cultec.com/stormwater_chamber.html
More Home and Garden Topics
Check Out All Costs for Home and Garden How Much Does Garden Service Cost? How Much Does a Kitchen Remodeling Cost? How Much Does a Propane Tank Cost?

Search Thousands of Topics on CostHelper.com

 
Today's Featured Cost Articles

About CostHelper
CostHelper is based in Silicon Valley and provides consumers with unbiased price information about thousands of goods and services. Our writers are experienced journalists who adhere to our strict editorial ethics policy.

CostHelper Community
Cost of care
Paid: 0.00
Wow, some of these previous comments seriously concern me. We have a dentist carrying on about how much it cost for his entire education and the cost of building and supplying an entire office... [more]
-Jason B
Dental Implants Cost
Generac 22kw quote
Paid: 18000.00
Recently quoted$18k for 2,400sq ft. Home. The generator itself is $5,300 with transfer switch. Nearly $13k install seems very high... [more]
-Jon Rad
Standby Generator Cost
2013 honda crv ignition cylinder repair
Paid: 180.00
Locksmith came to my house and repaired lock cylinder in an hour... [more]
-Brad Cowan
Ignition Lock Cylinder Replacement Cost
Teacup Pig
Paid: 100.00
Looking for a teacup pig. I’ll pay $100-300 if you have what I’m looking for in my price range please let me know... [more]
-Evelyn Hernandez
Teacup Pig Cost
You will not believe this!
Paid: 75000.00
Non emergency flight from Tucson to Phoenix this was 2021 I could have flown around the world several times what a 130 miles was these people need to go to jail for fraud and theft!I will never pay the huge bill chapter 7 only costs $2500... [more]
-Paul Polito
Air Ambulance Cost
L3-L4,L4-L5,L5-S1 multilevel laminectomies with micro disectomies.
Paid: 0.00
I had laminectomies and refused to have spinal fusion. I made a complete recovery. I had my surgery Apr/2020. Returned to work in mid-June. Feel good as new today. No back stiffness or pain... [more]
-Jose A Elizondo
Back Surgery Cost