A mortgage calculator is one of the simplest tools on any real estate website, and one of the most useful when it is filled in thoughtfully. I often see buyers plug in a list price and call it a day. With a few extra minutes, you can get a far more realistic picture of what a home will cost you each month. Here's how I suggest using one while you shop.

The four numbers every calculator needs

Most mortgage calculators, including the PEI mortgage calculator on my site, ask for some version of these:

• Purchase price. Use a realistic number for the homes you are considering, not just the listing you like best.
• Down payment. How much you will put down, as a dollar amount or a percentage.
• Interest rate. Use the rate your lender or broker has quoted you, not an advertised best-case rate.
• Amortization. The total number of years over which the mortgage is paid off.

Change one number at a time and watch how the payment moves. It's a quick way to understand what really drives your budget.

Run a few scenarios

Rather than one calculation, try three:

1. Comfortable: the price range where you would feel relaxed
2. Stretch: the top of what you could manage
3. Rate bump: your comfortable price with a slightly higher interest rate, to see how much room you have if rates rise at renewal

Seeing those side by side helps you set a price ceiling before emotions get involved at a showing.

Remember what the calculator leaves out

A basic calculator shows principal and interest. Your real monthly cost of owning a home on PEI includes more:

• Property tax. Find the assessment for the homes you are considering and estimate the yearly bill, then divide by twelve.
• Heat and power. Ask the seller for recent bills. Heating type makes a big difference here.
• Home insurance. Get a ballpark from a broker early, especially for older or rural homes.
• Water and sewer, or well and septic upkeep. Town services come with a bill; rural systems come with maintenance.
• Condo fees, if applicable.
• Mortgage default insurance, if your down payment is under 20 percent. This premium is often added to the mortgage, which raises the payment.

Don't forget the one-time costs

Beyond your down payment, you will need money at closing for things like legal fees, inspections and adjustments. My guide to PEI closing costs walks through what to plan for.

If you are buying a newly built home as a first-time buyer, a federal rebate may also affect your numbers. My explainer on the first-time home buyers rebate covers how it works.

Calculator vs. pre-approval

A calculator is a planning tool. A pre-approval is a lender's review of your actual income, debts and credit, and it tells you what they are willing to lend. Federally regulated lenders also check that you could afford payments at a minimum qualifying rate, often called the stress test, which is usually higher than the rate on your contract. That means the amount you qualify for may be lower than a calculator suggests. Use the calculator to explore, then get pre-approved before you start making offers.

Bi-weekly vs. monthly payments

Many calculators let you switch payment frequency. Accelerated bi-weekly payments can shorten your amortization because you make the equivalent of one extra monthly payment each year. Try it in the calculator to see the effect on your total interest.

A simple worksheet

• Mortgage payment (from the calculator)
• + monthly property tax estimate
• + monthly heat and power estimate
• + monthly insurance estimate
• + condo fees or a maintenance allowance
• = your true monthly housing cost

Fixed or variable?

Your calculator results will change depending on the rate type you choose. A fixed rate keeps your payment steady for the term, while a variable rate can move with the market. There is no single right answer. Try both in the calculator using the rates you have actually been quoted, and talk with your lender about how comfortable you are with change in your monthly payment over the term.

Let's put real numbers to it

Once you have a comfortable range, I can show you homes that fit it and help you gather the tax and utility details for each one. Contact Jodi Bernard, CENTURY 21 Northumberland Realty, and let's turn your numbers into a shortlist.

There is nothing quite like a wood stove on a cold November night in the country. Plenty of homes around Kensington, Kinkora and the North Shore still have one, sometimes as the main heat and sometimes as a cozy backup. If you are buying one of those homes, there is a step you will want to plan for early: the WETT inspection.

What WETT actually is

WETT stands for Wood Energy Technology Transfer. WETT Inc. is a non-profit training and education association that runs the national WETT program in Canada. It trains and certifies people who inspect, install and maintain wood-burning systems.

Here is the part that trips up a lot of buyers and sellers: WETT does not certify stoves, chimneys or installations. It certifies individuals. So there is no such thing as a "WETT-certified stove." What you get is a written inspection report from a WETT-certified professional, and their certification number should be on that report.

Why your insurer will probably ask for one

Insurance companies often require a WETT inspection before they will insure, or renew coverage on, a home with a wood-burning appliance. The report helps them judge fire risk. If the inspector finds problems, the insurer may want repairs done before coverage starts.

That matters because you usually need insurance confirmed before your lender will fund the mortgage. Finding out about a stove issue a few days before closing is stressful. Finding out during your condition period is just part of the process.

Requirements vary from company to company, so call your insurer or broker before you write an offer and ask two things: what level of inspection they want, and how old a report they will accept.

The three levels of inspection

WETT's guidance describes three levels.

• Visual. A look at the parts of the appliance and venting you can see without taking anything apart. The inspector measures clearances, opens stove doors and accessible clean-outs, and looks at the chimney from the ground. WETT notes this level is usually enough for most real estate and insurance inspections.
• Technical. Everything in a visual inspection, plus hands-on work such as removing panels, taking apart flue pipes, going into the attic or getting up on the roof. It is often recommended when a visual inspection raises concerns, or when a stove has sat unused for a long time.
• Invasive. Used when hidden components need a closer look, for example after a chimney fire. It can involve opening walls or ceilings.

For a typical purchase, start with the visual inspection and let the inspector tell you if more is needed.

How I fit it into an offer

When a home I am showing has a wood stove, I talk with my buyers about it before we draft anything. A few practical points:

• Ask the seller for any existing report. Some sellers have a recent one from their own insurer. It is a helpful starting point, though your insurer may still want a fresh inspection.
• Leave enough time. WETT inspectors can be booked up in the fall when everyone is lighting their first fire. Build a realistic window into your conditions.
• Pair it with your home inspection. A general home inspector will note the stove, but a WETT inspection goes deeper on clearances and venting. My PEI home inspection checklist covers the rest of the house.
• Get repair quotes if issues come up. A missing heat shield is a very different conversation from a chimney that needs replacing.

Questions to ask the seller

• How often was the stove used, and when was it last used?
• When was the chimney last cleaned, and by whom?
• Was the stove installed with a permit or by a certified installer?
• Has there ever been a chimney fire?
• Is the stove the main heat source or a backup?

None of these answers replace an inspection, but they help you and the inspector know where to look.

If you are selling a home with a wood stove

Sellers can make this easier for everyone. Having the chimney cleaned, keeping receipts, and gathering any past inspection reports before you list saves time once an offer comes in. Buyers feel more confident when the paperwork is ready, and it can help keep the deal on track.

Is a wood stove a deal-breaker?

Not at all. Many buyers love them, and a well-installed stove can be a real comfort during a power outage. It is simply a feature with an extra step. Go in knowing what your insurer needs, and you can enjoy the fire without surprises. If you are timing a purchase in the colder months, my winter home buying tips are worth a read too.

When you are ready to look at homes across Prince Edward Island, including country properties with wood heat, I am happy to help. Contact Jodi Bernard, CENTURY 21 Northumberland Realty, to talk through a property or book a showing.