The reason nobody can tell you what townhouse fees include is that a townhouse in Ontario can sit inside several completely different legal structures, and the fee means something different in each one.

1. A standard condominium townhouse. You own a unit, the corporation is responsible for the common elements, and you pay common expenses. This is the structure most people picture when they hear condo fee.

2. A freehold townhouse tied to a common elements condominium. You own the house and the lot freehold, and your lot is legally tied to a corporation that owns only shared common elements. You pay a monthly fee for the shared parts. This is the one that surprises buyers.

3. A freehold townhouse with no fee at all. You own everything, you maintain everything, nobody sends you a monthly bill.

4. A freehold townhouse with a private road or shared maintenance arrangement that is not a condominium. A contractual arrangement among owners rather than a corporation, which means the obligations and the enforcement are different again.

So the first question about any specific townhouse is not how much the fee is. It is which of those four it is, and the answer comes from the title and the governing documents rather than from a listing description. Everything else on this page follows from that answer.

In a standard condominium, there are individual units and there are common elements, and the Condo Authority of Ontario describes this as the most common type of condominium in the province.

What the fee covers. According to the Condo Authority of Ontario, common expenses cover contributions to the reserve fund together with day to day operating costs such as maintaining common areas.

How your share is worked out. Each unit's share is set out in the declaration and is generally calculated by applying that unit's percentage to the annual budget. It is not negotiable and it does not change because of how you use the property.

The part that catches people. Owners must pay their share even if they do not use certain amenities. A household that never touches the pool or the party room still contributes to both.

And the crucial caveat for townhouses specifically. What counts as a common element varies between corporations. In some townhouse condominiums the roof, windows and exterior are common elements maintained by the corporation. In others, more of the exterior is the owner's responsibility. There is no general rule you can apply, and the answer is in the declaration for that specific corporation.

Which means the only reliable way to know what your fee covers is to read the governing documents, which the Condo Authority of Ontario advises all buyers to review before purchasing: the declaration, the by-laws and the rules.

This is the single most misunderstood arrangement in the Ontario townhouse market, and it produces more unpleasant surprises than anything else on this page.

A common elements condominium has no units at all. According to the Condo Authority of Ontario it consists only of shared common elements, which are used by the owners of parcels of tied land. Shared assets in such a corporation can be things like shared roads or recreational facilities.

Each parcel of tied land, commonly called a POTL, is legally attached to those common elements, and its owner holds a common interest in them through that POTL.

What that means for a townhouse buyer in plain terms. You buy the house and the lot freehold. You own and maintain your own roof, windows, walls and everything else about the house. And you still receive a monthly common expense bill, because your lot is tied to a corporation that owns the shared parts.

In a townhouse development the shared parts are commonly a private road, visitor parking, walkways, landscaped areas and sometimes a garbage or snow arrangement for those common areas. The fee is usually much smaller than a standard condominium fee, for the straightforward reason that it is covering far less.

And here is the error that costs people money. A buyer sees a lower fee than a standard condominium and assumes they are getting the same coverage more cheaply. They are not. They are getting coverage of the shared parts only, and the roof is theirs. Budget for both the monthly fee and your own capital maintenance, because in this structure you have both.

The reserve fund is the part of a condominium's finances that most determines whether today's fee is sustainable, and most buyers never look at it.

What it is. According to the Condo Authority of Ontario, the reserve fund is an account the corporation can use only for major repairs and replacements of common elements and assets. It is not an operating account and it is not available for day to day costs.

How the required amount is established. Reserve fund studies, completed by specialists such as engineers, estimate how much money the fund needs. The Condo Authority of Ontario states that after the first study, one must be completed at least every three years.

Why a buyer should care more about this than about the monthly figure. If the fund holds materially less than the study says it should, the gap has to be closed eventually, and it is closed through higher fees, a special assessment or deferred work that becomes more expensive later. All three land on whoever owns the unit at the time.

Which produces a conclusion that runs against instinct. Between two similar townhouses, the one with the lower fee is not necessarily the better buy. A fee held artificially low against an underfunded reserve is a cost that has been postponed rather than avoided, and you would be buying the postponement.

So compare the reserve position, not the fee. That means reading the reserve fund balance and funding plan rather than the monthly number in the listing.

For a resale purchase in any condominium structure, including a common elements corporation, the status certificate is the document that converts guesswork into fact.

What it shows. The Condo Authority of Ontario states that it shows the reserve fund balance and funding plan, and that it includes any shared facilities agreement the corporation is party to.

Why the shared facilities point matters for townhouses. Developments sometimes share amenities, roads or services between corporations under an agreement, which means costs you did not expect and governance you did not know about. That agreement is not obvious from a visit.

Have a lawyer read it rather than skimming it yourself. A lawyer who does condominium work will look for the reserve position against the study, any special assessment levied or contemplated, arrears, litigation, insurance, and the rules that affect how you intend to live there.

For a pre-construction purchase the equivalent is the disclosure statement, including the first year budget and the proposed reserve fund contributions. The Condo Authority of Ontario advises pre-construction buyers to review it along with any shared facilities agreements. Our guide to buying pre-construction in Ontario covers that side.

And for every buyer, the Condo Authority of Ontario advises reviewing the governing documents, meaning the declaration, the by-laws and the rules, before purchasing. For a townhouse the rules on pets, parking, what you may do with a yard or a terrace, and exterior alterations are the ones that most often matter later.