57:
comparisons. For example, REColorado, the multiple listing service covering the Denver metro area, presents a
UtilityScore widget on homes for sale. Zillow publishes a Sun Number score on the home fact sheet so website visitors can compare the solar energy potential of prospective properties. Trulia has published a report using automated estimates from UtilityScore to present water, natural gas and electric rates into a single price per square foot by zip code.
35:
AEMs calculate specific efficiencies such as location, water, energy or solar efficiency. The
Council of Multiple Listing Services defines an AEM as, “any algorithm or scoring model that estimates the of a home without an on-site inspection. They are similar to Automated Valuation Models (AVMs), but
91:
AEMs generate a score for a specific property based on both publicly available housing characteristics about the subject property as well as mathematical modeling. AEMs are technology-driven scores without an onsite inspection or human assessment. For more accurate information unique to a specific
39:
Most AEMs calculate a property’s selected efficiency by analyzing available public information and may also apply proprietary data or formulas, and allow for a user such as a home owner to make additional inputs. Housing characteristics such as age of the home or square footage may be obtained by
56:
By design, the AEM score output is provided as a preliminary comparison tool so the score of one property may be compared to other homes, against an average score for the area, etc. Primary users may vary from buyers and sellers to real estate agents and appraisers as they complete relevant
336:
According to the
Council of Multiple Listing Services advantages are, “AEMs provide consumers with a quick comparison of all properties across a specified market. Since most focus on the attached systems and structure, they are only meant to reflect the efficiency of the real property.”
27:
that estimates a real estate property’s efficiency (in terms of energy, commuting, etc) by using details specific to the property which are available publicly and/or housing characteristics which are aggregated over a given area such as a zip code. AEMs have some similarities to an
345:
According to the
Council of Multiple Listing Services advantages are, “AEMs are dependent on data used, the assumptions made, and the model methodology. Since models and methodologies differ and no on-site inspections are performed, accuracy may vary among scoring systems.”
82:
According to
National Mortgage Professional Magazine AEMs may one day be incorporated into loan underwriting as well, “Since utilities are as big or bigger part of home expenses than even real estate taxes, we may see begin to be factored into underwriting.”
324:
As shown in the section above, AEMs tend to rely on public information rather than information which is private to the resident such as actual utility bills. Utility bills can vary based on the occupancy and
60:
Beyond usage for consumer preliminary comparisons, usage of AEMs varies by industry. AEMs may also be used by solar installers, home improvement contractors, efficiency inspectors, and mortgage lenders.
329:
within a structure. The public information used in AEMs is relatively static as it is focused on details of the structure, location and/or mechanical systems and therefore tends to reflect the
99:
Detailed information on the data accessed to calculate an AEM, the modeling formulas and algorithms are generally not published. A summary of general information is listed in the table below:
68:
industry, installers use Sun Number to reduce the soft costs associated with motivating consumers to invest in solar systems and in recording property specifications to create quotes. The
717:
212:
Consumption data based on a physics-based model and
Tendril True Home methodology, home characteristics as matched to customer data such as for Realltors Property Resource.
189:
Aggregates high-resolution aerial data and GIS software to estimate rooftop pitch and orientation; applies algorithms to factor local weather conditions and impact of shade
72:
has found that Sun Number eliminates 7–10 days from the quotation process when solar suitability is determined digitally and eliminates the need for an onsite inspection.
258:
Public and private data sources; 31 factors including mortgage rates, property taxes, estimated utility bills, insurance rates, commuting costs and daycare
44:
or a similar offerings. Estimates of energy usage may be available from published sources such as through the
Residential Energy Consumption Survey by the
491:
415:
812:
725:
967:
938:
363:
515:
41:
442:
79:(LEM). During underwriting, an AEM such as the H+T Affordability Index is used to calculate the location efficient value
45:
1002:
143:
Cost prediction based on local utility rates, personal usage habits; home characteristics as provided by Zillow
797:
642:
665:
465:
310:
Public data on neighborhood characteristics and household characteristics; methodology has been peer-reviewed
598:
76:
528:
860:
499:
69:
29:
393:
690:
492:"An Overview of Two Land Use Planning Tools Location Efficient Mortgages and Inclusionary Zoning"
587:
McPherson, Marian (September 19, 2016). ""UtilityScore comes to REcolorado.com"". Inman News.
550:
McPherson, Marian (September 19, 2016). "UtilityScore comes to REcolorado.com". Inman News.
416:"Sun Number Partnership with Zillow Brings Solar Potential Scores to Millions of Americans"
8:
24:
75:
AEMs have been used in the mortgage industry to support a niche loan product called a
36:
are more reliant on public data such as square footage...and estimated energy usage.”
326:
747:
529:"News from NAMP: October 20, 2016. Utility Bills May Be Coming to the Internet"
283:“Data sources include Google, Education.com, Open Street Map, the U.S. Census,
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996:
561:
330:
65:
93:
912:
772:
266:
813:"MLS offers app that shows what it will really cost to own that home"
718:"What is the home energy consumption data? "Will my score change?""
284:
886:
166:
Aggregates electricity- and gas-related cost and consumption data
620:
489:
490:
Birdsell, T.; Dewar, J.; Sommers, K.; Zeidman, M. (2012).
32:(AVM) in terms of concept, advantages and disadvantages.
146:
REcolorado, Attom Data
Warehouse (formerly RealtyTrac)
287:, and places added by the Walk Score user community”
798:"The week in real estate industry deals: Nov. 21-25"
643:"The week in real estate industry deals: Nov. 14-18"
599:"The week in real estate industry deals: Oct. 10–14"
443:"Before you buy that home, avoid utility bill shock"
977:. Council of Multiple Listing Services. May 9, 2016
948:. Council of Multiple Listing Services. May 9, 2016
373:. Council of Multiple Listing Services. May 9, 2016
691:"Zillow adds solar power scores to property pages"
498:. Washington University. p. 2. Archived from
994:
968:"CMLS Green Sheet: Automated Efficiency Models"
939:"CMLS Green Sheet: Automated Efficiency Models"
364:"CMLS Green Sheet: Automated Efficiency Models"
356:
333:transferred during a real estate transaction.
422:. U.S. Department of Energy. October 24, 2016
301:$ of housing + transportation (low to high)
666:"New Blueprint for Rooftop Solar Analysis"
526:
466:"New Blueprint for Rooftop Solar Analysis"
586:
549:
531:. National Mortgage Professional Magazine
391:
92:property an onsite inspection such as an
810:
671:. Solar Builder Magazine. pp. 20–23
664:Herman, David (September–October 2013).
471:. Solar Builder Magazine. pp. 20–23
464:Herman, David (September–October 2013).
392:McPherson, Marian (September 19, 2016).
995:
811:Brambila, Andrea (November 12, 2014).
663:
463:
394:"UtilityScore comes to REcolorado.com"
197:Tendril Home Energy Consumption Score
712:
710:
708:
623:. Queensland Times. November 26, 2016
440:
40:data providers such as those on this
975:Council of Multiple Listing Services
946:Council of Multiple Listing Services
919:. Center for Neighborhood Technology
893:. Center for Neighborhood Technology
621:"How energy efficient is your home?"
371:Council of Multiple Listing Services
42:list of online real estate databases
527:Councilman, J. (October 20, 2016).
215:Realtors Property Resource, Redfin
13:
705:
51:
16:Mathematical model for real estate
14:
1014:
46:Energy Information Administration
800:. Inman News. November 24, 2016.
340:
280:United States, Canada, Australia
21:automated efficiency model (AEM)
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645:. Inman News. November 19, 2016
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693:. Inman News. October 25, 2016
601:. Inman News. October 15, 2016
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1:
748:"Tendril Energy Intelligence"
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319:
249:$ of lifestyle (low to high)
441:Grant, Kelli (26 Oct 2016).
7:
861:"Real Estate Professionals"
77:Location Efficient Mortgage
10:
1019:
722:Realtors Property Resource
313:MSP H+T Calculator, Abogo
70:U.S. Department of Energy
30:automated valuation model
246:Energy, water, location
203:1–100 (worst to best)
1003:Mathematical modeling
496:Washington University
274:1–100 (worst to best)
180:1–100 (worst to best)
157:1-100 (worst to best)
134:1–100 (worst to best)
773:"Tendril Customers"
568:. GTI International
114:User input allowed?
420:EERE Success Story
25:mathematical model
728:on 26 August 2017
505:on March 23, 2017
327:personal property
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566:MyUtilityScore
562:"How It Works"
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835:"Methodology"
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341:Disadvantages
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140:United States
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131:Energy, water
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108:Type of Score
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96:is required.
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66:photovoltaics
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979:. Retrieved
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950:. Retrieved
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921:. Retrieved
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817:. Retrieved
815:. Inman News
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780:. Retrieved
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755:. Retrieved
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730:. Retrieved
726:the original
721:
695:. Retrieved
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673:. Retrieved
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625:. Retrieved
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603:. Retrieved
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570:. Retrieved
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533:. Retrieved
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507:. Retrieved
500:the original
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473:. Retrieved
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424:. Retrieved
419:
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398:. Retrieved
396:. Inman News
387:
375:. Retrieved
370:
358:
344:
335:
323:
235:Energy costs
151:Energy Score
128:UtilityScore
98:
94:energy audit
90:
81:
74:
63:
59:
55:
38:
34:
20:
18:
627:28 February
605:28 February
572:28 February
535:28 February
509:28 February
475:28 February
449:28 February
426:28 February
400:28 February
120:Methodology
87:Methodology
865:Walk Score
839:Walk Score
350:References
320:Advantages
267:Walk Score
243:TLC Engine
174:Sun Number
169:REA Group
917:H+T Index
891:H+T Index
295:H+T Index
238:Estately
163:Australia
997:Category
867:. Redfin
841:. Redfin
503:(Thesis)
298:Location
290:Various
285:Localeze
271:Location
117:Location
981:1 March
952:1 March
923:1 March
897:1 March
887:"About"
871:1 March
845:1 March
819:1 March
777:Tendril
752:Tendril
697:1 March
675:1 March
649:1 March
516:Alt URL
377:1 March
232:Unknown
229:Unknown
226:Unknown
200:Energy
192:Zillow
183:Unknown
64:In the
782:25 Aug
757:25 Aug
732:25 Aug
445:. CNBC
223:Energy
154:Energy
971:(PDF)
942:(PDF)
669:(PDF)
469:(PDF)
367:(PDF)
177:Solar
111:Score
23:is a
983:2017
954:2017
925:2017
899:2017
873:2017
847:2017
821:2017
784:2017
759:2017
734:2017
699:2017
677:2017
651:2017
629:2017
607:2017
574:2017
537:2017
511:2017
477:2017
451:2017
428:2017
402:2017
379:2017
252:Yes
206:No
160:Yes
137:Yes
105:AEM
19:An
999::
973:.
944:.
915:.
889:.
863:.
837:.
775:.
750:.
720:.
707:^
564:.
494:.
418:.
369:.
304:No
277:No
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.