Boulder assessor designates 327 properties destroyed by flood

Posted by Tom Kalinski Founder RE/MAX of Boulder on Monday, December 16th, 2013 at 3:32pm.

It’s been three months since the 100-year flood that affected Boulder County, among others, and officials are starting to get a handle on the extent of the damage to buildings.

According to Boulder County Assessor Jerry Roberts, the flood destroyed 327 structures on 313 parcels of land, valued at approximately $12 million. “Destroyed” structures were identified as those that, as a result of the flood, were:

• Moved off of their foundations;
• Suffered collapsed walls or roofs;
• Had an interior water level reaching above the door knob of the first floor; or
• Leaned at an unintended angle which would require a rebuild.

For those whose homes qualify for the destroyed designation, the assessor will prorate property taxes from Sept. 13 through the end of 2013, resulting in about $30,000 lost in property taxes, Roberts says.

The assessor’s office will re-evaluate properties in early 2014, as some will have rebuilt by then and others may not be able to rebuild.

A letter from Roberts to flood-impacted residents reads:

“For many of you, your property values, which are used to determine your annual property tax payments, will be adjusted downward to reflect the destruction to your physical residence. In all cases your land values will hold their value, but your constructed buildings (also referred to as “improvements”) will be prorated to reflect the reduction in value caused by the flood.

“A proration in property value for destroyed structures (resulting in a reduction of 2013 taxes) will be calculated for the dates of Sept. 12 through Dec. 31 of this year.

“Our guidelines for prorating are based on the amount of destruction to the structure which must be severe enough to make it unsafe. Our appraisers are in the field now to assess properties destroyed, make adjustments to the value of improvements, and complete our office’s initial assessment of destruction before our final certification in early December. We are also using other sources of data including information from various government and non-governmental entities and aerial photography and satellite images before and after the flood.

“Damaged and destroyed properties will be re-evaluated next year and adjusted according to how much land and improvement impact there is, whether a destroyed building is being or has been rebuilt, and whether the property has suffered significant market impact. These properties will be reevaluated at the beginning of each subsequent year until they have recovered.
“For those of you who considering taking more time to rebuild on your lot, state laws allow us to keep the residential classification in place for your property even if the structure hasn’t been rebuilt for up to two years after the year of destruction. In these cases, the residential land classification (which equates to a lower tax rate) remains in place for at least two subsequent property tax years, and up to five subsequent tax years if the assessor determines there is evidence the owner intends to rebuild or locate a residential improvement on the land.”

Roberts encourages residents to contact his office at (303) 441-3530 or use the self-reporting form to inform the assessor about flood impacts to their property.
Colorado 2013 Flood by the Numbers
Here’s a breakdown of the location of the 313 properties the flood destroyed in Boulder County in September. As more than one structure was destroyed on some properties, a total of 337 structures were affected, 53 of which were outside designated 100-year flood zones.

-          49 properties destroyed in 100-year flood zone
-          12 properties destroyed outside 100-year flood zone


-          20 properties destroyed in 100-year flood zone
-          6 properties destroyed outside 100-year flood zone


-          54 properties destroyed in 100-year flood zone
-          3 properties destroyed outside 100-year flood zone


-          82 properties destroyed in 100-year flood zone


-          1 property destroyed in 100-year flood zone

Unincorporated Boulder County

-          54 properties destroyed in 100-year flood zone
-          32 properties destroyed outside 100-year flood zone

For more details about the location of properties destroyed in the flood, see the Boulder County Assessor’s map at,-105.279922&spn=0.231081,0.425034&z=11&source=embed
Source: Boulder County Assessor’s Office

Tom Kalinski 
Owner and Founder
RE/MAX of Boulder

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