Home Measurement Services in St. Louis
ANSI-compliant square footage measurements to protect your sale, listing accuracy, and financing eligibility.
Home Measurement Services
ANSI-compliant square footage measurements to protect your sale, listing accuracy, and financing eligibility.
Home Measurement Services
ANSI-compliant square footage measurements to protect your sale, listing accuracy, and financing eligibility.
What is a Home Measurement Service?
What is a Home Measurement Service?
What is a Home Measurement Service?
A home measurement is a professional on-site service that determines the square footage (gross living area, or GLA) of a property. Unlike tax records or owner estimates, this measurement follows standardized ANSI guidelines.
Fannie Mae now requires lenders to use ANSI-compliant measurements on appraisals, which can impact both listing and financing
outcomes.
A probate appraisal is a formal real estate valuation used during the legal process of settling an estate after someone passes away. It determines the fair market value of property as of the date of death, ensuring compliance with IRS and court requirements.
Whether the estate includes a family home, rental property, or multiple parcels, an accurate appraisal is essential for fair distribution, tax reporting, and legal filings.
Why Accurate Square Footage Matters
Why Accurate Square Footage Matters
Why Accurate Square Footage Matters
Listing Accuracy: Accurate GLA is the foundation of pricing. List price, price per square foot, and CMA comparisons all depend on correct square footage.
Financing Risk: If a lender’s appraisal shows a lower GLA than advertised, it may jeopardize the loan or renegotiation.
Avoid Disputes: Buyers and agents often challenge measurements — a report from a certified appraiser helps eliminate confusion.
Fannie Mae Compliance: Measurements using ANSI standards reduce the risk of financing delays or denials.
Even a 100 sq. ft. difference can lower perceived value by thousands. Our measurements give you clarity — before a buyer or lender finds a problem.
Even a 100 sq. ft. difference can lower perceived value by thousands. Our measurements give you clarity — before a buyer or lender finds a problem.
Why You Need a Specialist
Why You Need a Specialist
Not all measurements are created equal. Our certified team:
Uses ANSI-aligned measurement protocols
Delivers clear, defensible floor plan sketches
Identifies non-livable areas, exclusions, and room breakdowns
Works with agents, sellers, appraisers, and homeowners
We’ve helped countless sellers, agents, and homeowners avoid costly surprises and ensure accurate reporting in MLS listings and appraisals.
Our simple 3-step process:
Request a quote
Get started with a free online quote.
Schedule your appraisal
Choose a time that works best for you.
Receive your report
Get your detailed, accurate appraisal quickly.
Our simple 3-step process:
Request a quote
Get started with a free online quote.
Schedule your appraisal
Choose a time that works best for you.
Receive your report
Get your detailed, accurate appraisal quickly.
Our simple 3-step process:
Request a quote
Get started with a free online quote.
Schedule your appraisal
Choose a time that works best for you.
Receive your report
Get your detailed, accurate appraisal quickly.
What Our Clients Are Saying
Over
+
5 Star Reviews
Jeanie Loyd
I had a great experience with Zach! My appointment was scheduled quickly, and Zach stayed in communication with me. He was flexible with his availability. On the day of my appraisal, Zach was prompt, courteous and friendly. He informed me of the next steps. Overall, it was a really great 5 star experience. Thank you, Zach!
Stephen Bezdek
Stephanie was great to work with. Her communication throughout the process was top notch, her questions were spot on and her final report was excellent. Her rationale for her final number was thoroughly explained and she provided ample documentation to justify that number. A true professional that I would recommend to anyone.
Vicki Christopher
I highly recommend Authority Appraisals. They are professional, very responsive, and happy to help you! I would definitely call them first for your appraisal needs.
Robert Schaeg
I'm very pleased with the service provided by Authority Appraisals. We had James come out and look at a piece property for Estate purposes. James took his time going through the house and based on how detailed the report was, I know he spent a lot of time researching to give me a fair and honest value for the property which I truly appreciate. I would definitely recommend Authority Appraisals to anyone that asked.
Caleb Singleton
Pam was out recently to appraise our house. She was so nice and efficient! She made the process so easy for us and had the appraisal turned around quickly to our lender. The whole team there is great to deal with and I have no reservations recommending them to anyone.
Adam Wiener
Easy 5 star review! Bad decisions are made when you fail to avoid those low quality appraisers who do not know how to properly produce an accurate appraisal. Zack and his team leave no stones unturned, they will measure and do the necessary research. You will get an accurate thorough written appraisal if you hire Zack
Amy Bartell
Authority Appraisals did a wonderful job appraising my home. The appraiser was polite, professional and very detailed. They were upfront about the process and answered all of my questions. I would definitely recommend this company to anyone in need of appraisal services.
Terra Treece
Zack was well informed and answered every question I had. He’s an expert in this field and I would highly recommend him to anyone needing an appraisal, whether personal or professional. Thanks for supplying me with wealth of knowledge!
Ashley Grier
Very informative. Zack knows his information and understands the real estate market from a realtor’s perspective. He’s kind and generous with his knowledge. Highly recommend.
Maizee Styf
Zack was incredibly helpful and informative. He worked quickly and was very prompt with responses and information! We would highly recommend him and will most likely use him for any of our future appraisal needs!
Mark Muehleisen
Appraiser was professional, courteous, and very knowledgeable about the appraisal process. Offered to answer any further questions we had after the process was finished.
Shawn Tihen
Zach has been an appraiser for our company/branch for almost 15 years. He and his staff deliver their reports in a timely manner and more importantly provides quality reports which is critical for us and our customers. They are always available to answer any of our underwriters questions when they come up. If you are looking to add an appraiser or appraisers to your rotation; you'll be very happy with Authority Appraisals.
Sharon Rhodes
I have had 2 appraisals with this company. I used them because they were extremely responsive as well as knowledgeable. Most importantly I felt that I could trust the work they were doing.
Stacy Shipman
Great job! Fast, inexpensive, and very happy with the price outcome. Friendly and very on top of everything. Great communication! Thank you!
What Our Clients Are Saying
Over
+
5 Star Reviews
Jeanie Loyd
I had a great experience with Zach! My appointment was scheduled quickly, and Zach stayed in communication with me. He was flexible with his availability. On the day of my appraisal, Zach was prompt, courteous and friendly. He informed me of the next steps. Overall, it was a really great 5 star experience. Thank you, Zach!
Stephen Bezdek
Stephanie was great to work with. Her communication throughout the process was top notch, her questions were spot on and her final report was excellent. Her rationale for her final number was thoroughly explained and she provided ample documentation to justify that number. A true professional that I would recommend to anyone.
Vicki Christopher
I highly recommend Authority Appraisals. They are professional, very responsive, and happy to help you! I would definitely call them first for your appraisal needs.
Robert Schaeg
I'm very pleased with the service provided by Authority Appraisals. We had James come out and look at a piece property for Estate purposes. James took his time going through the house and based on how detailed the report was, I know he spent a lot of time researching to give me a fair and honest value for the property which I truly appreciate. I would definitely recommend Authority Appraisals to anyone that asked.
Caleb Singleton
Pam was out recently to appraise our house. She was so nice and efficient! She made the process so easy for us and had the appraisal turned around quickly to our lender. The whole team there is great to deal with and I have no reservations recommending them to anyone.
Adam Wiener
Easy 5 star review! Bad decisions are made when you fail to avoid those low quality appraisers who do not know how to properly produce an accurate appraisal. Zack and his team leave no stones unturned, they will measure and do the necessary research. You will get an accurate thorough written appraisal if you hire Zack
Amy Bartell
Authority Appraisals did a wonderful job appraising my home. The appraiser was polite, professional and very detailed. They were upfront about the process and answered all of my questions. I would definitely recommend this company to anyone in need of appraisal services.
Terra Treece
Zack was well informed and answered every question I had. He’s an expert in this field and I would highly recommend him to anyone needing an appraisal, whether personal or professional. Thanks for supplying me with wealth of knowledge!
Ashley Grier
Very informative. Zack knows his information and understands the real estate market from a realtor’s perspective. He’s kind and generous with his knowledge. Highly recommend.
Maizee Styf
Zack was incredibly helpful and informative. He worked quickly and was very prompt with responses and information! We would highly recommend him and will most likely use him for any of our future appraisal needs!
Mark Muehleisen
Appraiser was professional, courteous, and very knowledgeable about the appraisal process. Offered to answer any further questions we had after the process was finished.
Shawn Tihen
Zach has been an appraiser for our company/branch for almost 15 years. He and his staff deliver their reports in a timely manner and more importantly provides quality reports which is critical for us and our customers. They are always available to answer any of our underwriters questions when they come up. If you are looking to add an appraiser or appraisers to your rotation; you'll be very happy with Authority Appraisals.
Sharon Rhodes
I have had 2 appraisals with this company. I used them because they were extremely responsive as well as knowledgeable. Most importantly I felt that I could trust the work they were doing.
Stacy Shipman
Great job! Fast, inexpensive, and very happy with the price outcome. Friendly and very on top of everything. Great communication! Thank you!
What Our Clients Are Saying
Over
+
5 Star Reviews
Jeanie Loyd
I had a great experience with Zach! My appointment was scheduled quickly, and Zach stayed in communication with me. He was flexible with his availability. On the day of my appraisal, Zach was prompt, courteous and friendly. He informed me of the next steps. Overall, it was a really great 5 star experience. Thank you, Zach!
Stephen Bezdek
Stephanie was great to work with. Her communication throughout the process was top notch, her questions were spot on and her final report was excellent. Her rationale for her final number was thoroughly explained and she provided ample documentation to justify that number. A true professional that I would recommend to anyone.
Vicki Christopher
I highly recommend Authority Appraisals. They are professional, very responsive, and happy to help you! I would definitely call them first for your appraisal needs.
Robert Schaeg
I'm very pleased with the service provided by Authority Appraisals. We had James come out and look at a piece property for Estate purposes. James took his time going through the house and based on how detailed the report was, I know he spent a lot of time researching to give me a fair and honest value for the property which I truly appreciate. I would definitely recommend Authority Appraisals to anyone that asked.
Caleb Singleton
Pam was out recently to appraise our house. She was so nice and efficient! She made the process so easy for us and had the appraisal turned around quickly to our lender. The whole team there is great to deal with and I have no reservations recommending them to anyone.
Adam Wiener
Easy 5 star review! Bad decisions are made when you fail to avoid those low quality appraisers who do not know how to properly produce an accurate appraisal. Zack and his team leave no stones unturned, they will measure and do the necessary research. You will get an accurate thorough written appraisal if you hire Zack
Amy Bartell
Authority Appraisals did a wonderful job appraising my home. The appraiser was polite, professional and very detailed. They were upfront about the process and answered all of my questions. I would definitely recommend this company to anyone in need of appraisal services.
Terra Treece
Zack was well informed and answered every question I had. He’s an expert in this field and I would highly recommend him to anyone needing an appraisal, whether personal or professional. Thanks for supplying me with wealth of knowledge!
Why Families and Professionals Trust Authority Appraisals
Trusted & Proven
440+ 5-star reviews from families, attorneys & CPAs across Missouri & Illinois.
Certified Reports
48-hour turnaround on most appraisals. Court & IRS compliant reports.
Local Experts
Based in St. Louis — we understand both the market and the moments that matter.
Why Families & Professionals Trust Authority Appraisals
Trusted & Proven
440+ 5-star reviews from families, attorneys & CPAs across Missouri & Illinois.
Certified Reports
48-hour turnaround on most appraisals. Court & IRS compliant reports.
Local Experts
Based in St. Louis — we understand both the market and the moments that matter.
Why Families and Professionals Trust Authority Appraisals
Trusted & Proven
440+ 5-star reviews from families, attorneys & CPAs across Missouri & Illinois.
Certified Reports
48-hour turnaround on most appraisals. Court & IRS compliant reports.
Local Experts
Based in St. Louis — we understand both the market and the moments that matter.
"They helped me get the right measurements so I could list my home at the right price — no guessing, no surprises."
– Corey S., Home Seller
"They helped me get the right measurements so I could list my home at the right price — no guessing, no surprises."
– Corey S., Home Seller
"They helped me get the right measurements so I could list my home at the right price — no guessing, no surprises."
– Corey S., Home Seller
Proudly Serving Communities Across Missouri & Illinois
View our coverage areas for residential and commercial property appraisals using the tabs below.
Residential in Missouri
Residential in Illinois
Comercial Appraisals
REQUEST A QUOTE
In our service area? We make it easy to get started.
Proudly Serving Communities Across Missouri & Illinois
View our coverage areas for residential and commercial property appraisals using the tabs below.
Residential in Missouri
Residential in Illinois
Comercial Appraisals
REQUEST A QUOTE
In our service area? We make it easy to get started.
Proudly Serving Communities Across Missouri & Illinois
View our coverage areas for residential and commercial property appraisals using the tabs below.
Residential in Missouri
Residential in Illinois
Comercial Appraisals
REQUEST A QUOTE
In our service area? We make it easy to get started.
Serving Communities Across Missouri & Illinois
View our coverage areas for residential and commercial property appraisals using the tabs below.
Residential in Missouri
Residential in Illinois
Comercial Appraisals
REQUEST A QUOTE
In our service area?
Frequently Asked Questions
FAQ's
Q: What areas do you serve?
Q: What areas do you serve?
Q: What areas do you serve?
Q: Why is ANSI compliance important?
Q: Why is ANSI compliance important?
Q: Why is ANSI compliance important?
Q: What’s included in the home measurement report?
Q: What’s included in the home measurement report?
Q: What’s included in the home measurement report?
Q: How is this different from the county assessor’s square footage?
Q: How is this different from the county assessor’s square footage?
Q: How is this different from the county assessor’s square footage?
Q: What information do you need to get started?
Q: What information do you need to get started?
Q: What information do you need to get started?
Q. How long does it take?
Q. How long does it take?
Q. How long does it take?
Q. How do I schedule a home measurement?
Q. How do I schedule a home measurement?
Q. How do I schedule a home measurement?
Ready to get started?
Feel free to contact us and get a free quote!
Ready to get started?
Feel free to contact us and get a free quote!
Ready to get started?