Should you build a custom home or renovate your existing home?
Somewhere in the house you own there is a room that has stopped working. Maybe several. The children outgrew it, or the kitchen faces the wrong way, or the layout made perfect sense for the people you were when you bought it and makes none for the people you are now. So you are standing in front of a decision with a hundred smaller decisions folded inside it, and the first one is the hardest. Do you change this house, or build a new one?
Most people assume a renovation will be the cheaper and quicker of the two, but this is not always true. Three things close that gap. How much the structure has to move, what is behind the walls, and what the lot allows. We dive deep into these below to help you make this very big decision seem a little less daunting.
Should you move, or can this house do what you need?
Something changed in your life. A third child. Parents moving in. Five days a week working from a house where the home office is the kitchen table. Whatever it was, the house stopped fitting the life going on inside it, and that is the problem you are actually trying to solve.
When this happens, the main choice for most homeowners is a large renovation or a move. Both of the these options end in the same place, a house that fits.
Here is the part most people get backwards. You do not have to arrive at the answer before you talk to a builder. That conversation is how you get to the answer. If you understand what you want out of the house, how you want to live in it and what you are prepared to invest, and a builder who will walk the house with you and tell you what it can and cannot carry.
One family we worked with had children who had grown out of small bedrooms upstairs into teenagers who needed rooms of their own. They came to us certain they needed an addition to their current house. What they needed was a different layout inside the walls they already had. We helped guide them through that decision, and they stayed in the house they were ready to rebuild
If you are building new, the lot comes first. Where do you want to live, and in which community? You also have to ask, how do you want to live in that space to understand what lot size you should be looking for. How important is a backyard or an attached garage? The lot decides more than most people expect it to.
How does a builder decide between renovating and rebuilding?
In practice, the renovation-versus-rebuild decision comes down to five factors:
1. The end goal. What the finished space has to do, how you want to live in it, how big it needs to be, and how long you intend to stay. A client staying five years and a client planning to stay twenty get different advice about the same house.
2. Structure and foundation. The bones of the house dictate what you can change in the current house. Removing load-bearing walls requires more planning. The foundation decides where the outside of the house is, and moving it is a project of its own. Changing any of that can close the gap fast between a renovation and building new.
3. The lot. If you need more room than the house currently has, where does it come from? An addition out the back or the side, a second storey, or a reworking of what is already inside the walls. The size and shape of your lot decides which of those is even available.
4. What the zoning allows. The lot answer only holds if the Land Use Bylaw agrees with it, and in Calgary that changed in August 2026. A house that fits on paper may need a rezoning application before anyone can apply for a development permit.
5. Whether you can live on-site through it. Whether you can live on-site depends on the scope of work. For a whole-home renovation, we may require clients to relocate during construction due to the extent of the work, loss of essential services and site safety. For more contained kitchen or bathroom renovations, some clients choose to stay and make accommodations around the areas and services affected by the work. The season can also influence the timing of exterior work, with re-roofing and removing exterior walls carrying greater weather exposure in spring, so these phases are planned around more favourable conditions.
What drives the cost on a renovation, and what drives it on a custom home?
The two routes are expensive in different places. Two renovations of the same square footage can land a long way apart. Renovation costs are primarily driven by structural changes, unknown conditions behind existing walls, retrofitting mechanical systems and the number of secondary trades each change creates. Custom-home costs are driven primarily by size, architecture, exterior materials, windows, mechanical systems and interior finishes.
The main cost drivers on renovations
The first is surprise, and it is the reason a renovation budget carries a larger contingency than a new build does. Nobody knows what is behind the wall until it is open. The second is working around what is already there. Joists and structural framing sit where the new plumbing run wants to go, so other changes get made to accommodate them. Move a drain for a tub or a shower and most of the time it has to be accessed from below, which means opening the ceiling of the room beneath. The third is everything one decision pulls in behind it. Open that ceiling to move the drain and now there is plumbing labour, drywall and paint on the invoice too. One decision has booked four trades.
Then there are the retrofit inversions, where doing something in an existing house costs more than building it new. A curbless shower is a good example of this. What seems like a simple decision now means the floor height in the shower has to drop, which can affect the ceiling below, where a new house simply frames it in and nobody thinks about it again. Building codes also need to be taken into account. Renovating means bringing the electrical and the plumbing you uncover up to current standards before the walls close. For older homes, this sometimes can be more costly than building new.
The main cost drivers on a custom home
A custom home is just that. Fully custom. Price follows what you want out of the house, so there are fewer surprises. It is only limited by your budget and your requirements. Below are decisions that move the price most:
– Size. How many square feet, and how much of it gets finished.
– Architectural style. Style decides which materials are even in the conversation.
– Exterior materials. Brick and stone cost considerably more than siding.
– Windows and energy efficiency. Quality and energy rating vary widely, and so do the prices.
– Roofing. Asphalt shingles at one end, concrete tile at the other, and a large gap in between.
– Mechanical. Heating, cooling, and filtration. On a new build this is specified from nothing rather than adapting to an HVAC system that is already there.
– Interior finishes and appliances. There is no limit to price here. This is dictated by your taste and how you need the house to work.
What can a renovation change, and what is fixed for good?
A renovation can change a surprising amount, but the existing foundation, floor-to-floor heights and envelope construction place important limits on what is practical and economical.
| WHAT YOU WANT TO CHANGE | IN A RENOVATION | IN A NEW BUILD |
| Interior layout | Usually yes, depending on load bearing walls and support beams. Walls come out, the direction of a kitchen changes, a floor plan gets reworked inside the existing walls | Yes, and it is drawn before anything is built |
| Window size and placement | Yes, within the structure. Enlarging an opening means new headers and structural work above it, which inflates the cost. | Yes |
| Taking out a wall | Yes, with an engineer involved. A wall that holds the house up needs to be retrofitted with a load-bearing beam to take its place, which is a structural change that can be costly, but not always cost prohibitive. | Yes, and it is drawn that way from the start |
| Heating, cooling, electrical and plumbing | Yes, however older systems can require a lot of changes to be brought up to code. It is rarely simple. New ducting and pipe has to find a path through floors and walls that were never built to hold it, which can mean dropped ceilings, boxed-in corners, or lifting a floor to get underneath it | Yes, designed in before anything is built |
| Basement ceiling height | Only by digging down and underpinning, which is its own project and often cost prohibitive compared to building new. | Set at design |
| Foundation footprint | Only by extending it, which is costly compared to building new, as it may have impacts on landscaping and other exterior elements. | Set at design |
| Envelope performance | Improvable, and bounded by what the existing assembly allows. | Built to spec from the outside in |
Making a window bigger is where the cost quietly sits in most renovations. The wall above a window carries weight, so a wider opening needs a bigger beam over it, and that is structural work nobody pictures when they ask for more light.
Removing a wall, making the windows bigger, turning a kitchen around, or relocating it entirely, all of it can be done well and cost effectively, but It starts with understanding how your house was built.
A renovation is a long list of considerations. A custom home is a long list of decisions. Neither is harder than the other, they are just different, and the quickest way through either list is to sit down with a builder early, while every answer still costs nothing to change.
What can a new build do that a renovation cannot?
Predictability. We know what we are going to encounter when we are starting fresh, and we are building everything with a purpose from the beginning.
Underneath that sits everything a new build lets us put in before the drywall goes on, which a renovation only gets where the walls are already open.
Mike explains that backing is a good example. It goes in at framing behind towel bars, toilet paper holders, kitchen cabinet runs and return-air covers, where the HVAC trade usually leaves a thin strip of metal to screw into and nothing else. A few hours of work with material already left over on site, costs very little and prevents a fixture from sagging in a year. “There’s nothing more aggravating than installing a toilet paper holder onto drywall that’s going to droop in 12 months.”
The same thinking runs through the rest of it. We build a house that seals well, which is what keeps the heat in and a Calgary February out, and what makes it cheaper to run every month you own it. A house sealed that well needs fresh air brought in on purpose rather than through gaps, so every home we build gets a system that does exactly that.
What do builders find when the walls come open?
We have a saying here. A home is not built to be renovated. Kevin Mullen, who founded Empire, puts it plainly. “We don’t know what’s behind the wall, we don’t know what’s in the wall. We can conceptualize and plan for it, but until we actually begin the full execution, we don’t know for sure.”
The worst thing to find is moisture penetration, especially over the long term. It affects the structure and it affects your health, because there can be mould in the walls, and all of it has to be remediated or replaced. It becomes its own project sitting inside the one you planned. Insulation out, drywall off, re-waterproof, sometimes remediate or replace the framing, all before the original work can carry on. It is usually not what people budget, but it has to be done.
A homeowner called us after moving into a house built by another Calgary builder. There was water staining around some pot lights on the main floor, so we went in to investigate. When we cut open the ceiling we could see water coming in from the outside envelope. As we kept cutting and exposing more, we found a corner of the house where water had been entering, and the beams in that corner were structurally compromised. We replaced structural beams, replaced framing and re-waterproofed.
The house was five years old.
So price a renovation with a bigger contingency than you would a new build, and hold your vision a little more loosely on a renovation, as your current home dictates more of what is possible.
A little water stain might seem like something you just paint over. You do not know where it is actually coming from until you get into it. We sometimes have to have hard conversations explaining what we find, and how it changes the project.
What permits do you need to rebuild on your lot in Calgary?
A lot that can take an addition only helps if the Land Use Bylaw agrees. For a new house on an existing inner-city lot, the sequence runs in an order most people have backwards.
1. Development permit. Always required in a developed district. Two application types. A contextual application follows strict design guidelines with no relaxations, cannot be refused or appealed if it meets every rule, and runs 60 days to a decision. A discretionary application allows relaxations and runs 90 days, plus a 21-day advertisement and appeal period.
2. Demolition permit. It sits between the development permit and the building permit, not at the front.
3. Building permit. Review of roughly 21 days. The permit expires 180 days from issuance.
Development permit fees for a single detached dwelling in the developed area came to $1,859 as of September 2026. City figures move, so check them against the City’s new house construction page before you plan around them.
According to the City of Calgary website, Calgary council approved the repeal of citywide rezoning on April 8, 2026, and it came into effect on August 4, 2026. Ninety-nine per cent of properties went back to the low-density zoning that applied before August 2024. If you want more housing choice than the base zone allows, you now need a rezoning application before a development permit, and R-CG itself was tightened at the same time, with maximum height down from 11 m to 10 m and lot coverage down from 60 per cent to 55 per cent.
This work belongs at the front of a project, and we are too often pulled into projects that are well down the design process without ever reflecting on the location of the house. When we get pulled into the conversation late, we end up having to have the hard conversation with the home owner.
How long does a custom build take compared with a renovation?
Most people assume a renovation is quicker than building new, but that isn’t always true. Depending on the extent of the renovations and the age of the house, retrofitting existing systems can take considerably more time than building it with purpose from scratch.
We build a 3,500 to 4,000 square foot inner-city home in 10 to 12 months when the home owner has all decisions made before we start or promptly during construction. When decisions come late the build runs longer. Usually it takes six months to go through the selection process, and Mike is direct about why this should come first. “It’s just way quicker to build on-site when the trades understand the scope, so there isn’t a bunch of changes going back and forth through the process. You hit the go button, and it’s all synced together.”
A renovation is harder to put a number on. Seasons matter less when the exterior walls are staying, because the work is inside and the weather stays out of it, so sometimes you can more flexible with timing your project start date. Open the envelope and the calendar restrictions come back. For example, we avoid re-roofing an occupied house in spring due to rain, and basements get dug in March rather than in the deep freeze.
Bring us the house
We renovate and we build. That means when you bring us your house, we can tell you whether renovation or rebuilding makes more sense.
Common questions
Is it cheaper to renovate or rebuild?
Usually a renovation costs less, and the gap is smaller than most people expect. What closes it is surprise. Open a wall for a small job, find a window that has been leaking for years, and the mould remediation and re-waterproofing that follow are not in anyone’s budget. By the time that corner has been taken out, re-waterproofed, cleaned and rebuilt, the saving from keeping the original structure has narrowed toward the cost of starting fresh. It converges. In our experience it does not flip.
Should I move or renovate?
That is the decision most people are actually making, and it is settled before any drawing exists. Start with the end goal. What do you want from the finished house, how do you want to live in it, how big does it need to be, and how long do you plan to stay? Then check whether the house you own can carry that answer. Families come to us certain they need to move and leave having found a different layout inside the walls they already had.
How do I know if my foundation is worth keeping?
Look past the foundation. We check the ceiling height in the basement, seven feet, eight or nine, and whether that is a number you will live with for twenty years given what you are about to spend above it. Then the lot, and where extra room would actually come from once the setbacks are taken off it. A house can have a sound foundation and still be the wrong house for what you want.
What is the minimum ceiling height for a basement suite in Alberta?
Alberta Municipal Affairs sets the minimum ceiling height for living space in a secondary suite at 1.95 m, which is 6 feet 5 inches, and notes that this matches the standard for unfinished basements, so most existing homes can be adapted. A safety codes officer can accept less in a pre-existing suite, case by case. Clearing that bar and wanting to live under it for twenty years are different tests, and the second one is the conversation we have.
Do I need a development permit to rebuild on my lot in Calgary?
Yes. A development permit is always required for a new house in a developed district. A contextual application runs 60 days to a decision and a discretionary one runs 90 days plus a 21-day advertisement and appeal period. The demolition permit comes after that and before the building permit, whose review runs about 21 days. Figures as of September 2026.
Did Calgary's blanket rezoning get repealed?
Yes. Council approved the repeal on April 8, 2026 and it took effect on August 4, 2026. Ninety-nine per cent of properties returned to the low-density zoning that applied before August 2024, which means anything beyond what your base zone allows now needs a rezoning application before you can apply for a development permit.
How do I check if a Calgary builder is licensed?
Alberta runs two free public registries, one searchable by property and one by builder. Builder licensing came in on December 1, 2017, and the builder registry shows licence status and class, persons in control, enforcement actions and the number of homes built since 2014. A home whose building permit predates December 2017 was built before licensing existed, which is a matter of timing and not a mark against anyone.
What is the difference between a custom builder and a production builder?
A production builder makes decisions for the masses. A custom builder makes decisions for one person at a time. For most people reading this, though, that is not the live comparison. The real one is whether you want one team under one roof or a team you assemble yourself, and the answer depends on how much of the coordinating you want to own.
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