Assessing

You may access the details of your assessment on the Vision Website. You may view any property at that site, and there is a sale look-up feature there as well. 

The 2025 tax rate for Londonderry is $14.47 per 1,000. This is set annually in October by the Department of Revenue.

Per RSA 79, Timber Tax, an “intent to cut” application must be completed and submitted to the Assessing Department before any timber can be cut from any property. The application can be completed by the logger but must be signed by the owner, as the owner is the person responsible for the payment of the timber tax. There can be exceptions to a cut. The law allows for up to 15,000 board feet of logs, 30 cords of wood, or 300 tons of whole wood tree chips to yield tax-free per tax year, so long as the logs or wood is used for the personal use of the owner. The logs or wood cannot be sold or even given in place of payment for the timber cut; a yield tax would be issued if that were the case. For purposes of land conversion, for example, land developed for a house, an “intent to cut” is not required if less than 15,000 board feet or 30 cords of wood are cut. Applications are available at the Assessor’s office; contact us if you have any questions.

To find the value of any piece of property, the Assessor must first know what properties similar to it are selling for, what it would cost to replace it, how much it takes to operate and keep it in repair, what rent it may earn, and many other dollar facts affecting its value, such as the current rate of interest charged for borrowing the money to buy or build properties like yours. Using these facts, the Assessor can then go about finding the property value in three different ways.

Sales Comparison Approach

The first method compares your property to others that have recently sold. These prices, however, must be analyzed very carefully to get the true picture. One property may have sold for more than it is worth because the buyer was in a hurry and would pay any price. Another may have sold for less money than it was worth because the owner needed cash right away. The property was sold to the first person who made an offer. When using the sales comparison approach, the Assessor must always consider such overpricing or underpricing and analyze many sales to arrive at a fair valuation for your property. Size, quality, condition, location, and time of sale are also important factors to consider.

Cost Approach

A second way to value your property is based on how much money it would take, at current material and labor costs, to replace your property with one similar. If your property is not new, the Assessor must also estimate how much a lot like yours would be worth, if vacant.

Income Approach

The third way is to evaluate how much income your property would produce if it were rented as an apartment house, a store, or a factory. The Assessor must consider operating expenses, taxes, insurance, maintenance costs, and the return most people would expect on your kind of property.

Abatement forms are available in the Assessor’s office and on-line after the final tax notice (December tax bill) has been mailed. The last day to apply for an abatement is March 1st following the final tax bill.

The Town of Londonderry has had an ongoing Cyclical Inspection program since 2002. At this time, we have completed measuring and listing the entire town the first time through. During the beginning of 2009, we began remeasuring and listing all properties again in South Londonderry with Map 1. This program began again in 2016 and will take about 5 to 6 years to do for the whole town. This program is only to verify the information that we have on our property record card. Your value will change only if we find discrepancies.

April 15th is the deadline for all applications for exemptions and credits. See exemptions on our website for specifics, or call the Assessor’s office at 603-432-1100, ext. 190, for more information.

The tax year by State Law starts on April 1st and runs through March 31st (the next year). When you are building a structure, you are taxed on what is there on April 1st of any year. When you remove a structure (i.e., pool), if it is taken down after April 1st, you will be taxed until the next year.

The 2024 ratio for Londonderry is 85.3%. This is set by the Department of Revenue (DRA). At the end of each year, the Londonderry Assessing Department sends a report to the DRA of all arms-length sales data that occurred between October 1st and September 30th. The DRA compares the assessed value and the selling price to determine a ratio between the two. All sales between family members, sales within corporations, foreclosures, and fiduciary sales are not considered to be arms-length sales and are eliminated from the data. The DRA calculates an average and determines what each Town's ratio is for the previous year. The 2025 ratio will be available in the spring of 2026.