Adapting to UAD 3.6: What’s Changing and How Appraisers Can Prepare

Adapting to UAD 3.6: What’s Changing and How Appraisers Can Prepare

The upcoming UAD 3.6 update from Fannie Mae and Freddie Mac represents a modernization of how appraisal data is reported. The new system focuses on clearer definitions, more structured property data, and a redesigned reporting format that aims to improve consistency across the mortgage industry. Despite the size of this big update, we can learn it little by little, together. Afterall, the best way to eat an elephant is one bite at a time.

Here is the appraiser’s guide to adapting to UAD 3.6.

UAD 3.6 vs. the Legacy UAD System (Quick Comparison)

First, a little side-by-side, so we can really see what is changing, and how. For more than a decade, appraisers have used the original Uniform Appraisal Dataset (UAD) with familiar forms like the 1004 and 1073. The newest version, UAD 3.6, keeps the core appraisal process the same but changes how appraisal data is structured and reported, allowing for property details to be highlighted in greater detail, and helps prevent those details from getting lost in the report.

It’s understandable that many appraisers feel uncertain about the new reporting structure. Any time a system used for more than a decade changes, there’s a learning curve. 

Still, in practical terms, appraisers will continue to inspect properties, analyze comparable sales, and develop opinions of value the same way they always have. So, how are these changes rolling out, and how are they affecting the process?

UAD 3.6 in 30 Seconds: What’s Changing and When

At its core, UAD 3.6 introduces a that replaces the familiar fixed forms used for years. The rollout will occur in phases, giving appraisers time to learn the new structure before the mandatory adoption date of November 2, 2026.

Limited Production Period

During the limited production phase, lenders and technology providers can begin submitting appraisals using the new UAD 3.6 dataset while the legacy format remains available. This early phase allows those in the profession to test workflows and identify practical adjustments before the new reporting standard becomes widely used.

Appraisers tend to approach their reports in a narrative format. During this time, they can experiment with finding efficiencies in the software while reporting the way that they are used to reporting. 

Dual Acceptance / Transition Window

During the transition period, both the legacy UAD format and the new UAD 3.6 reports will be accepted, giving appraisers time to gradually adjust their workflow. This dual system is intended to reduce disruption and allow the industry to transition in stages.

Mandatory Adoption Date

The key date to remember is November 2, 2026, when UAD 3.6 will become the required reporting format for GSE mortgage appraisals. That timeline gives appraisers time to familiarize themselves with the new system and integrate the updated reporting structure into their practice.

What “Show Your Work” Looks Like Under the New UAD

As reporting becomes more structured, appraisal conclusions must be clearly supported by data and analysis that connect logically throughout the report. In practice, this means ensuring that property characteristics, comparable selection, adjustments, and reconciliation all align with the evidence presented. In other words? Show your work! You may be thinking, “Isn’t this already my job as an appraiser?” 

Yes! In many ways, these “new” expectations align with long-standing USPAP principles that require appraisers to produce credible results supported by market evidence. This is just part of the profession. But the new UAD makes it even more obvious when there are little pieces missing from your report. 

It’s not that you don’t include details well enough, or that you need to learn how to write your reports “better.” Where there is a narrative buffer to cushion the logic in your current reports, the new reports are built to isolate the logic, and bring highlighters out to each point being made. This is bound to expose some gaps, or at the very least, areas that could use strengthening.

So, how should appraisers who are used to writing reports the legacy way start preparing for this new structure? Let’s dig in to the playbook.

Appraiser Adaptation Playbook

The transition to UAD 3.6 is primarily about learning the new reporting structure and incorporating it into existing workflows. Appraisers who begin reviewing the new dataset and practicing with the terminology now will likely find the transition smoother as the adoption deadline approaches.

What to Review First

Start by reviewing the new terminology, property data fields, and report structure introduced in the redesigned URAR. Understanding the language and layout early makes it easier to recognize how the new dataset relates to the forms appraisers already know.

Some of the first ways to get used to the new tech is to familiarize yourself with terminology changes.

Examples of terminology changes:

2. New Property Data Fields

UAD 3.6 expands the number of data fields collected about the property. Many characteristics that used to appear in free-text narrative comments are now structured fields. This helps lenders and investors analyze appraisal data consistently.

Examples of expanded data fields include "Improvements", Property Details", "Market Data", and "Site Characteristics". Here's an example of what one of these categories may include:

Under a "Site Characteristics" data field, an appraiser will be led to fill out information about the following elements:

• lot configuration

• topography

• utilities

• zoning compliance

• additional structures

• accessory dwelling units (ADUs)

• energy efficiency features

• construction stage

• foundation type

• construction materials

• heating/cooling systems

• exterior features

• neighborhood characteristics

• market conditions

• supply/demand indicators

Many of these fields existed informally before, but were described in comment sections rather than structured inputs.

3. The Redesigned URAR Report Structure

One of the biggest changes appraisers will notice is the new report structure. Instead of selecting a specific appraisal form (1004, 1073, etc.), the system uses a single dynamic report format called the Uniform Residential Appraisal Report (URAR).

The new URAR contains modules or sections that appear depending on the property type and assignment.

Examples of sections include Market Analysis, Sales Comparison, Income Approach (if applicable), Cost Approach (if applicable), and Subject Property, which could look something like this when broken down further:

Subject Property

• site details

• improvements

• additional improvements

• property condition

• neighborhood trends

• supply and demand

• marketing time

• comparable sale data

• adjustments

• analysis

Instead of forcing every appraisal into the same form layout, the URAR builds the report based on the assignment characteristics.

What to Practice

There’s so much to learn...where to begin?

GSEs recommend trying out different appraisal software to see what works best for you. Test out new technology. The best way to learn UAD 3.6 is to play with it, experiment, and take advantage of free trials. These software companies are offering lots of integrated tools to help you learn, and make your processes easier. 

Of course, you can always take trainings and study up on the differences to get your mind in the right place. But there is nothing like getting in the sandbox to learn a new tool.

Getting a handle on UAD 3.6 can be as simple as:

• Taking the Fannie Mae training

• Building a mock report

• Reviewing the new dataset fields

• Comparing a legacy report to the URAR structure

Common Friction Points When Reporting with UAD 3.6 (and How to Avoid Them)

Transitions to new reporting systems often highlight small inconsistencies in how information has traditionally been documented. Appraisers have started to notice some friction between their old reporting habits, and the way their reports are turning out with UAD 3.6 in the following areas.

Missing or Unclear Data Sources

Some of the new UAD 3.6 data fields require property characteristics to be documented with greater precision than before. If a report includes details about site utilities, zoning compliance, or accessory dwelling units, reviewers may expect a clear source such as MLS data, public records, permits, or direct observation during inspection.

Developing simple documentation habits (such as noting where information was obtained or confirming conflicting records) can help prevent situations where a reviewer questions how a property characteristic was determined.

Inconsistent Condition or Quality Ratings

UAD 3.6 reinforces standardized definitions for condition and quality ratings, which means those classifications should be applied consistently across the subject and comparable sales. For example, if the subject is rated C3, but a comparable with similar updates and maintenance is rated C4, reviewers may reasonably ask for clarification.

Taking time to review the updated definitions and apply them consistently across properties can help reduce unnecessary revision requests.

Comparable Data Inconsistency

Because the new dataset captures property characteristics in more structured fields, differences between the subject and comparable sales are easier to spot. For example, if the subject property includes features like a finished basement, accessory dwelling unit, or energy-efficient upgrades, those characteristics should be documented for comparable sales whenever possible.

In the past, appraisers sometimes relied on short comments such as “basement finished – similar to subject.” Under the new system, confirming comparable details through MLS data, prior listings, public records, or photos helps ensure the dataset tells a consistent story.

Balanced Narrative Commentary

Structured reporting reduces the need for long addenda, but narrative explanation still plays an important role when the data alone doesn’t fully explain the analysis. The goal is balanced reporting: providing enough explanation to clarify the reasoning without repeating information already captured in the structured fields.

How UAD 3.6 Can Offer an Advantage for Appraisers

While the new dataset may require adjustments to reporting workflows, it also creates an opportunity to present appraisal analysis more clearly and consistently. Structured reporting can make it easier for lenders and reviewers to understand how the appraiser arrived at the final opinion of value.

Clear data, consistent terminology, and transparent reasoning can help appraisal reports move more smoothly through underwriting and review processes. Reports that clearly connect data and analysis often face fewer follow-up questions. And that isn’t a knock to the classic narrative format of appraisal reports! 

As appraisers become familiar with the expanded dataset and reporting structure, they may find it easier to explain complex properties or unusual market conditions. A structured report can provide a clearer framework for presenting detailed market analysis.

Appraisers, You Can UAD!

UAD 3.6 represents a shift in how appraisal information is delivered, but your appraisal process is still the same. Appraisers play an essential role in real estate. The work that you do cannot be replaced by machines. The new UAD is for you, to make your reports clearer, more comprehensive, more consistent, and therefore more helpful to lenders, homeowners, and others reading it.

By becoming familiar with the new dataset and training resources now, you can approach the 2026 adoption deadline with confidence, eating the elephant just one bite at a time.