Protection Project
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Description
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Effective against what types of Flooding?
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Approximate Cost for a Single Family Home
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Swales and Rain Gardens
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Swales and rain gardens are areas where rainwater can collect and slowly seep into the ground. They provide extra storage for rainwater, but become less effective as groundwater levels get higher.
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Rainfall
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$1,000 - $2,500
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French Drains
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French drains are built by installing a perforated pipe in a small ditch and surrounding it with of gravel. They allow water to seep into the pipe and provide extra storage for rainwater, but become less effective as groundwater levels get higher. The end product should look no different than before the drain was installed, except that the ground is no longer soggy.
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Rainfall
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$2,000 - $5,000
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Cisterns and Rain Barrels
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Cisterns and rain barrels are waterproof containers designed to catch and store rainwater. They can be installed above or below ground and come in many different sizes. They are usually designed to drain after the storm has passed, and their capacities are unaffected by rising groundwater levels.
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Rainfall
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$500 - $2,500
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Perimeter Berms
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Perimeter berms are mounds of earth that surround a property. They create natural barriers between the home and the adjacent properties. It essentially isolates the property from the neighboring street to prevent flooding from spilling over and needs to be designed with other methods to completely isolate the area and get rid of rain that falls within the area.
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King Tides, Storm Surge
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$5,000 - $15,000
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Flood Walls
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Flood walls can be short or tall and are built around the perimeter of a property to create a barrier between the home and the adjacent properties. They isolate the property from the neighboring street to prevent flooding from spilling over and need to be designed with other methods to completely isolate the area and get rid of rain that falls within the area.
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King Tides, Storm Surge
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$5,000 - $15,000
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Temporary Perimeter Flood Barriers
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Temporary perimeter flood barriers come in all shapes and sizes, and can be set up ahead of a storm. They can prevent flooding in depths up to three feet, and new products are constantly being developed to provide better protection. They isolate the property from the neighboring street and need to be designed with other methods to get rid of rain that falls within the area.
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King Tides, Storm Surge
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$5,000 - $50,000+
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Temporary Flood Barriers for Doors and Openings
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Temporary flood barriers for doors and openings are designed to prevent floodwaters from entering doorways, windows, and other openings. They can prevent flooding in depths up to three feet, and new products are constantly being developed to provide better protection. They are generally for use in the most extreme flooding conditions, when water levels are high enough to creep in the front door, and usually require dry floodproofing.
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King Tides, Storm Surge, Rainfall
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$1,000 - $5,000
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Dry Floodproofing
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Dry floodproofing involves sealing a structure below the desired flood level to prevent water from entering. It requires sealing the walls with waterproof coatings or membranes, or extra masonry. It also requires the use of temporary flood barriers to seal off any doors or openings.
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King Tides, Storm Surge, Rainfall
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$7,500 - $15,000
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Elevating Outdoor Equipment
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Elevating the outdoor equipment would protect critical systems from failing during a flood. This equipment could include air conditioning units, electrical panels, pool pumps, among others.
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King Tides, Storm Surge, Rainfall
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$500-$2,500
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Elevating Interior Floors
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Elevating the interior floors can be done by building new floors inside without making any modifications to the exterior. While this would reduce the overhead clearance inside the house, it could potentially reduce flood insurance costs.
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King Tides, Storm Surge, Rainfall
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$7,500 - $25,000
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Elevating the Structure
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Elevating a structure works by raising the lowest floor to a height above the required or desired level of protection. It is the most effective way to reduce flood risk and will likely reduce flood insurance costs, but can be expensive and disruptive.
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King Tides, Storm Surge, Rainfall
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$100,000+
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