What determines how much your home is worth
A home's value is set by what a buyer will pay for it right now, which depends on location, condition, size, and what similar homes nearby have sold for recently. There is no single official number — a real estate agent, a bank appraiser, and a tax assessor can all arrive at different figures because they use different methods and serve different purposes. The most reliable measure is the sale price of comparable homes in your neighbourhood that closed in the last three to six months, because that reflects what actual buyers paid.
The price you could get today is different from what you paid, what you owe, or what the tax assessor says your home is worth. If you bought for $300,000 five years ago and the neighbourhood has appreciated, your home may be worth $350,000 now — but the bank's appraisal for a refinance, the tax assessor's value for property tax, and what a buyer will actually offer can each be different numbers.
Key Takeaways
- Home value is determined by recent sales of similar homes in your area, not by what you paid or what you owe on the mortgage.
- Location, square footage, condition, age, lot size, and local school quality are the main factors that move a home's price up or down.
- A real estate agent's comparative market analysis (CMA) is free and shows you what homes like yours sold for; a bank appraisal costs $300 to $500 and is required for a mortgage.
- Tax assessments, online estimates, and sale prices are three different numbers that serve different purposes and often do not match.
- Homes in the same neighbourhood can have very different values based on condition, updates, and specific features like a garage or finished basement.
Location and neighbourhood factors that set price
The single biggest driver of home value is location. A 2,000-square-foot house in a neighbourhood with good schools, low crime, and short commutes to jobs will sell for far more than an identical house in a neighbourhood with poor schools and longer commutes. Proximity to transit, parks, shopping, and employment centres also raises value. Homes on a busy street or near a highway typically sell for less than homes on a quiet street, even if the houses themselves are identical.
Neighbourhood trends matter too. If homes in your area have been selling faster and for higher prices over the last year, your home's value has likely risen. If homes are sitting on the market longer or selling below asking price, values are probably falling. Real estate agents track these trends through days on market (how long homes stay listed before selling) and the ratio of sale price to asking price.
Physical features and condition that affect value
Square footage, number of bedrooms and bathrooms, lot size, and the age of the home all influence price. A 3-bedroom, 2-bathroom home will generally be worth more than a 2-bedroom, 1-bathroom home in the same neighbourhood. Homes built in the last 20 years often command higher prices than homes built in the 1950s, though older homes in desirable neighbourhoods can be exceptions.
The condition of the home matters enormously. A house that needs a new roof, foundation work, or electrical updates will be worth significantly less than a similar home in good condition. Updates like a modern kitchen, updated bathrooms, new flooring, and energy-efficient windows can add value, though not dollar-for-dollar — a $30,000 kitchen renovation may add $20,000 to the home's value, not $30,000. A finished basement or a garage adds value; a home without a garage in a neighbourhood where most homes have one will be worth less.
How to find out what your home is worth
The fastest way is to ask a real estate agent for a comparative market analysis (CMA). This is free and shows you the sale prices of homes similar to yours that sold in your area in the last three to six months. The agent will adjust for differences — if your home has an extra bathroom or a newer roof, they note that. A CMA is not an appraisal and is not binding, but it gives you a realistic picture of what your home could sell for.
If you need an official value for a mortgage, refinance, or home equity line of credit, the lender will order a bank appraisal. This costs $300 to $500 and is done by a licensed appraiser who inspects the home and compares it to recent sales. The appraisal is required by the lender and is what they use to decide how much they will lend you.
Your local tax assessor's office publishes a value for property tax purposes, which you can find on your county or municipality website. This number is often lower than market value because it is used to calculate property tax, not to reflect what your home would sell for. Do not assume the tax assessment is what your home is worth.
Online home value estimates (from Zillow, Redfin, Realtor.com, and similar sites) are free but often inaccurate, especially for homes that are not typical for their area or that have had recent major updates. These tools use public records and algorithms but do not account for condition or recent renovations the way a human appraiser does.
Why your home's value changes over time
Home values rise and fall based on neighbourhood demand, interest rates, local job growth, and the overall economy. When interest rates are low, more buyers can afford homes, demand rises, and prices go up. When rates are high, fewer buyers may have access to for mortgages, demand falls, and prices may drop. A neighbourhood with growing employers and new residents will see home values rise; a neighbourhood losing population may see values fall.
Your own home's value can also change based on what you do to it. Major renovations, a new roof, or updated systems can raise value. Deferred maintenance, a roof that needs replacement, or outdated systems can lower it. However, the neighbourhood's trajectory matters more than any single home improvement — a $50,000 kitchen renovation in a declining neighbourhood may not pay off, while a modest home in a neighbourhood with rising demand may appreciate without any work.
The difference between home value, mortgage balance, and purchase price
These three numbers are often confused but are completely separate. Your purchase price is what you paid when you bought the home — it does not change. Your mortgage balance is how much you still owe the lender — it goes down as you make payments. Your home value is what the home is worth on the market today — it can go up or down regardless of what you paid or what you owe.
If you bought your home for $250,000 and still owe $200,000, but the home is now worth $300,000, you have $100,000 in equity (the difference between what it is worth and what you owe). If the home is now worth only $180,000 but you still owe $200,000, you are "underwater" or "upside down" — you owe more than it is worth. Your equity is what matters for refinancing, home equity loans, or selling.
How appraisals, assessments, and market value differ
A bank appraisal is an opinion of value by a licensed professional, ordered by a lender and used to decide how much to lend. It typically takes one to two weeks and costs $300 to $500. The appraiser inspects the home and compares it to recent sales.
A tax assessment is a value assigned by your local government for property tax purposes. It is updated every few years (the schedule varies by state and county) and is usually lower than market value. You can appeal it if you think it is too high, but it is not meant to reflect what your home would sell for.
The market value is what a buyer will actually pay right now. It is determined by recent sales of comparable homes and current demand. This is the number a real estate agent's CMA estimates, and it is the most useful number if you are thinking about selling.
Frequently Asked Questions
How often does home value change?
Home values can shift monthly based on new sales in your area, neighbourhood trends, and broader economic conditions like interest rate changes. However, most homes do not have a dramatically different value from month to month. A significant change usually takes place over a year or longer, unless your neighbourhood is experiencing rapid growth or decline.
Can I use an online estimate to refinance my home?
No. Lenders require a formal appraisal by a licensed appraiser, not an online estimate. Online tools are useful for a rough idea of value, but they are not accepted for mortgages, refinances, or home equity lines of credit. You will need to pay for an appraisal if you want to refinance.
What if my home's value dropped since I bought it?
If your home is worth less than what you owe, you have negative equity. You can still live in the home and make payments, but you cannot sell without bringing cash to closing or negotiating with the lender. Refinancing may not be an option. Waiting for the neighbourhood to recover or making improvements can help, but there is no quick fix.
Does a new roof or kitchen increase my home's value by the full cost?
No. A $20,000 kitchen renovation may add $12,000 to $15,000 to your home's value, not the full $20,000. The return on investment varies by neighbourhood and by how much the update is needed. A new roof is often seen as a necessary repair rather than an upgrade, so it may not add much value — it just prevents the home from losing value.
Who should I trust to tell me what my home is worth?
A real estate agent's comparative market analysis is free and based on actual recent sales, so it is a good starting point. If you need an official number for a lender, you need a bank appraisal. Avoid relying on online estimates alone, and do not assume the tax assessment reflects market value — it usually does not.