Revaluations
Overview
Overview
A Revaluation, or Market Update, is the process of updating all property values in town to reflect their current market value (i.e., to maintain reasonable estimates of what each property could sell for on the open market), as required by law. The Assessor's office conducted a town-wide property revaluation in Spring 2024. The next town-wide revaluation of all Scarborough properties is tentatively scheduled to occur in 2029.

Market adjustments are always a challenge. The goal is to appraise thousands of properties, all at one time, to create uniform, equitable and fair assessments. We strive to follow established industry standards for mass appraisal; however, we recognize that there will be situations where the mass appraisal approach may produce an estimate of value that seems somewhat high or low for an individual property.
We are committed to working with all property owners to ensure that every property is assessed at a reasonable estimate of its market value. The Assessor’s office affords all property owners a chance for an informal meeting where you can appeal your new assessed value and ask questions about the assessment process.
Revaluation Cycle
Revaluation Cycle: 5-Year Plan*
- Next Town-Wide Revaluation: April 1, 2029
- Last Town-Wide Revaluation: April 1, 2024
The April 1, 2024 revaluation was performed by in-house Assessing staff. Prior to the in-house revaluation, an independent contractor (KRT Appraisal) was hired by the town to conduct one in 2019; after which, post-revaluation public workshops were conducted by town leadership and Assessing regarding how the revaluation process could be improved upon. These public workshops produced two meaningful outcomes:
- Conduct regularly scheduled revaluations. This would ensure that the property tax burden is spread equitably across all taxpayers; and
- Use in-house Assessing staff. In addition to reducing the cost (less than $20,000 for the 2024 revaluation, as compared to $391,000 for the 2018/2019 revaluation performed by KRT Appraisal), the Assessing staff is able to provide a higher level of customer service throughout the process rather than hire an independent contractor, since Assessing has a “Scarborough-specific” base of knowledge of Town properties and the real estate market.
*Note: Revaluations are planned to occur once every 5th year, unless special circumstances necessitate otherwise. Market update revaluations will be based upon an analysis of all available information, including sales data from the preceding two years. This routine cycle will help to maintain a fairly apportioned property tax burden and provide predictability for taxpayers.
FAQ
FAQ
Please see the following list of frequently asked questions received by the Assessing Department related to the revaluation process. To read more about a specific FAQ, click on an item below to expand.
Revaluation Basics
- What is a Revaluation?
- Why is a revaluation performed?
- Why conduct in-house versus hiring an independent company?
What is a Revaluation?
A Revaluation is the process of conducting the Data Collection and Market Analysis necessary to equalize the values of all properties within a Municipality for the purpose of a fair distribution of the tax burden. The purpose of a Revaluation is not to raise or lower the tax assessments or tax base of a municipality. The main purpose of a Revaluation is to establish fairness and equity among all property owners and all property types.
Why is a revaluation performed?
A revaluation is done to equalize the values within a municipality to ensure a fair distribution of the tax burden. It is not done to raise taxes. Property values change over time, but they do not all change at the same rate. Market value may have increased more for some neighborhoods and property types than for others, while others still may have decreased in value. A revaluation is done to make sure assessed values reflect changes that have occurred in the real estate market.
Why conduct in-house versus hiring an independent company?
After the 2019 revaluation performed by KRT Appraisal, post-revaluation public workshops were conducted by Town Leadership and Assessing regarding how the revaluation process could be improved upon, which produced two meaningful outcomes:
- to perform regularly scheduled revaluations; currently proposed to occur once every 5th year, unless special circumstances necessitate otherwise. Market update revaluations will be based upon existing property data and sales data from the preceding 2 years. This routine cycle will help to maintain a fairly apportioned property tax burden and provide predictability for taxpayers.
- to use in-house Assessing staff, rather than an independent contractor, since Assessing has a “Scarborough-specific” base of knowledge of Town properties and real estate market. In addition to being able to provide a higher level of customer service throughout the process, using Assessing staff will reduce the cost.
Revaluation Procedures & Methods
- What’s the difference between a Full Revaluation and a Statistical Revaluation?
- Why would a Statistical Revaluation be used over a Full Revaluation?
- What if there are no reasonably comparable sales?
- The inside of my home was not inspected, so how could you reassess it?
- What is the valuation formula?
- How will I know if my assessment is fair and equitable?
What’s the difference between a Full Revaluation and a Statistical Revaluation?
Full Revaluations involve the interior and exterior inspection and re-measurement of all properties, which necessitates entry into each residence or building.
Statistical Revaluations use existing data to revalue all town properties, avoiding onsite property inspections except to confirm validity of data for a sample of properties. Sales are then analyzed to determine new town-wide values. With respect to each of these processes, the resulting valuation is exactly the same—the only difference is one is costlier to perform, while the other is cost-efficient.
Why would a Statistical Revaluation be used over a Full Revaluation?
By using the statistical approach to analyze existing data and recent real estate sales, the Assessor can readily determine whether the assessments represent 100% of the fair market value and if they are equitable among property owners and property types. If assessment inequities exist, it may be necessary for the Assessor to make appropriate adjustments to maintain fairness and equity.
What if there are no reasonably comparable sales?
All factors that may affect the market value of your property will also be considered, such as the cost to replace your building(s) less any depreciation, plus the value of the land could be used to estimate the market value. For income producing properties, the income and expenses may be considered.
The inside of my home was not inspected, so how could you reassess it?
The Assessor’s Office maintains a complete record of each property. Information is kept current through permit inspections, sales inspections, periodic re-inspection and exterior reviews; these records are available for your review in our office or on our Vision Online Database. The details on your property card are used to determine your new value. We encourage you to review your property card for accuracy.
What is the valuation formula?
Valuations formulas are complex. We use a proprietary relational database program that is commonly used for assessment purposes. Many data points are entered, including location, buildability, size, quality of construction, depreciation, amenities, outbuildings, etc. Then elements are priced out using various mathematical equations resulting in a total that should be a rough approximation of market value. The real question is whether the final total is in the ballpark (within 10%) of market value.
How will I know if my assessment is fair and equitable?
There are two very good methods of determining this. First, compare your property to similar, nearby properties that sold in the previous year. Your value should be in line with these sale prices. Second, if no recent sales are available, compare your assessment to other similar properties in your area using the data available in the Assessor’s Office or on the town website. Your value should be in line with these similar properties. Remember, very few properties are exactly alike. Your value should be comparable, but it seldom will be exactly the same as what seems to be a similar property.
Impact on Property Taxes
Will a Revaluation increase taxes?
Although a Revaluation may result in an adjustment to nearly each individual assessment; it does not mean that property taxes will increase. Please remember, assessments are only the base that is used to determine the individual tax burden of each and every taxable property. The overall operating budget, which is the amount that the Municipality must raise to operate the local government and support the many services each of us has come to expect is what truly affects individual property taxes.
Does the Town conduct a revaluation to raise more money?
Assessed Value / Market Value
- Will I be given advance notice if my property’s assessment is going to change?
- Why might my assessed value increase after a Town-wide revaluation?
- Why might my assessment go up more than my neighbors?
- Do all property values change during a Revaluation?
- Do all assessments change at the same rate?
- Does the “5 Year Revaluation Cycle” mean my property’s assessment will only change once every 5 years?
- What is fair market value?
- What is market value and who determines my property value?
Will I be given advance notice if my property’s assessment is going to change?
Every year, the Assessing office provides advanced notice via mailed letters to all owners whose property will experience an increase of more than $25,000. These notifications are usually sent in late June or early July, which provides time to review and discuss with the Assessing office before values are committed for taxes in late August.
In a revaluation year, advanced notifications of preliminary property valuations will be provided to ALL property owners. In the months leading up to the revaluation process, the Assessing office will communicate expectations for the timeframe of these notifications.
Why might my assessed value increase after a Town-wide revaluation?
Why might my assessment go up more than my neighbors?
It is possible that the information we had on their property was already more accurate, or that they did not maintain their property as well, or that we discovered missing information about your property. It is also possible that there is inaccurate information on your property’s assessment record. This is one reason we send out a notice of proposed valuation for your review in advance of tax commitment. Thousands and thousands of pieces of information have been entered into our system over the years, so it is possible for errors to occur. Please let us know of any data corrections. Some changes may cause value increases and some may cause decreases. Assessment data is available online our Vision Online Database.
Do all property values change during a Revaluation?
It is likely that most property values will change, however, they will not all change at the same rate. Market value may have increased more for some neighborhoods and property types than for others. The values of some neighborhoods and property types may have even stayed the same or decreased in the current market. The purpose of the revaluation is to make sure that the assessments reflect those changes in market value.
Do all assessments change at the same rate?
Not necessarily. Individual properties within the same neighborhood differ in characteristics and different neighborhoods command different values. In one area, the sales may indicate a substantial increase in value, while another neighborhood may see a lesser change in property values. Different types of properties within the same neighborhood may show different value changes. For example, older homes may be rising in value more slowly than newer homes in the same neighborhood, or one-story homes may be in more demand than two story homes, or vice versa. There are numerous factors that will cause values to differ between properties including, but not limited to, location, condition, size, age, quality, and building style.
Does the “5 Year Revaluation Cycle” mean my property’s assessment will only change once every 5 years?
Not necessarily. There are a number of reasons why individual properties or groups of related properties could experience a change in their assessment in any given year, whether or not there is a town-wide revaluation. Some common examples include:
- New Value Created
Construction of new buildings; renovations or additions to pre-existing buildings; subdivisions of larger parcels into smaller lots.
- Property Changes
Change in a property’s permitted use; physical damage to a building.
- New Information
Survey displaying different acreage than lot size on record or an area designated as wetlands; review of deeds outlining an encumbrance like an easement; discovery of errors or inconsistencies requiring correction.
What is fair market value?
Market value is defined as the amount a typical, well-informed buyer would be willing to pay a willing seller for a property. For a sale to be considered a qualified sale used to determine market value, it must be an arm’s length transaction -- the buyer and seller must not be related, the buyer must not be under pressure to buy and the seller must not be under pressure to sell, the property must be on the market for a reasonable length of time, the payment must be in cash or equivalent, and the financing must be typical for that type of property.
What is market value and who determines my property value?
People (including you); the person who sold your house to you; and the person who is willing to buy it from you determine the market value of your property. Some people will pay more than fair market value for property, while others may have purchased their property at a bargain price, or some property may have been purchased years ago when prices and values were considerably different. The true test is what your property is worth now in today’s real estate market. Is your property’s assessment in line with recent sales prices of similar properties?
Hearings & Appeals
- What if I don't agree with the assessed value of my property?
- What is an Informal Hearing?
- If I disagree with my assessment after an informal hearing, what are my options?
- Should I pay my taxes if I choose to appeal?
What if I don't agree with the assessed value of my property?
If you believe the new assessed value does not represent fair market value of your property, you will be afforded an opportunity to have your concerns addressed through informal hearings, as well as more formal processes. You should first notify the Assessor’s Office to set up an informal hearing.
When questioning the assessment value, ask yourself three questions:
1. Is my data correct? (living area, bedrooms, baths, lot size, etc.)
2. Is my value in line with others on the street?
3. Is my value in line with recent sale prices in my neighborhood or comparable areas?
Note: You should be aware that whenever an assessment appeal is initiated, the assessment can be lowered, sustained (kept the same), or raised. If we receive new information as a result of the informal appeals process, it will need to be considered. It’s important to weigh the potential benefits and drawbacks before proceeding.
What is an Informal Hearing?
Towards the end of the Revaluation Project, every property owner will receive a notice of their proposed valuation based on the analysis performed. When a property owner has a question or concern about the proposed valuation, they are asked to schedule a date and time to discuss the valuation process and get answers to any questions they may have. An informal hearing is not a forum to discuss taxes; it is strictly meant to answer questions on the property valuations.
Property owners are asked to come prepared with questions and should have already compared their property to other similar sale properties in their neighborhood. Once the hearing is finished, a determination will be made on the need for further review and if changes are warranted.
If I disagree with my assessment after an informal hearing, what are my options?
If you still feel entitled to relief after meeting or speaking with the Assessor, you should file a formal appeal in accordance with Maine State Statute, Title 36, §843: Appeals.
Should I pay my taxes if I choose to appeal?
Educational Materials
Property Search Tools
Property Search Tools
VISION DATABASE
The Vision Database allows you to search and view Property Cards, more commonly known as Field Cards, on each parcel of real estate in Scarborough; it contains information on assessments, property features, sales data, and ownership. Click “Vision Database” below, enter your address, select your property and click “Field Card” (dark orange button in the upper right corner). Please notify our office if you find any discrepancies in your record.
GIS PARCEL VIEWER
The GIS Parcel Viewer is an interactive web map showing available digital parcel data and can be used to search, compare, and evaluate properties within the town. Click “GIS Parcel Viewer” below and search by Owner, Location (Address) or Map/Lot (e.g., R059024). You will also have access to layers of information (e.g., current sales, water influenced lots, zoning, flood zones, etc.), and even view aerial photographs of the town. To view data that may impact your property, select the “Layers” tab.
HISTORICAL RECORDS
The Historical Records can be used for searching archived documentation maintained for Scarborough properties (e.g., building permits, inspection records, and other code enforcement and planning department documents). To access these historical records, go to “GIS Parcel Viewer” and in the search field enter an Owner, Location (Address), or Map/Lot (e.g., R059024), then see “Related Documents” under Links.
- To access the Assessing Database, select "Launch Database" under Links
- To access Codes & Planning Department database, select "Launch DocX Search" under Links

In addition to the above resources, you can get answers to frequently asked questions by visiting our Assessing FAQ and Revaluations FAQ subpages.
