Condo renovations: fees, voting rules and the buy or rent decision

Why condo renovations matter so much in a buy or rent decision

Real estate listings rarely talk about condo renovations. Yet the amount of works voted at the owners’ meeting can radically change the real cost of buying and heavily influence any serious buy or rent calculation.

When you buy a condo, you don’t just pay your mortgage at today’s rates (around 3.6%), notary fees (7–8% on existing properties) and property tax. You also contribute to shared works: façade, roof, elevator, boilers, energy retrofit, etc. These costs can reach hundreds of euros per year and sometimes tens of thousands of euros at once.

To assess properly whether it’s better to buy or rent in your case, you must factor in the montant_travaux parameter (total renovation cost on your horizon). That is exactly one of the key inputs in our buy vs rent simulator on buy-or-rent.net.

Types of condo works and their financial impact

Not all condo works are equal. Some are predictable, others not. Their impact on your budget, and therefore on your buy or rent analysis, is very different.

1. Routine maintenance

These works are recurrent and already included in yearly condo fees:

• Cleaning, gardening, minor repairs
• Maintenance contracts (central boiler, elevator)
• Replacing worn equipment (intercom, lighting in common areas)

Example: a boiler maintenance contract at €4,000/year for a 20‑unit building costs about €200/year per owner if shares are similar.

These amounts are built into condo fees, often in the range of €20–40/m²/year depending on the building. For a 50 m² apartment that means roughly €1,000–2,000/year.

2. Major capital works (façade, roof, elevator)

This is where the real financial risk lies:

• Façade renovation: €100,000–300,000 depending on size
• Roof replacement: €50,000–150,000
• Elevator replacement: €50,000–120,000

Example: façade works costing €200,000 in a 25‑unit condo. If your apartment represents 4% of the building shares, your share of the bill is €8,000. That’s more than a full year’s rent for many one‑bedroom rentals.

3. Energy retrofit (insulation, heating systems, DPE)

With tighter rules on inefficient buildings, more and more condos are voting for:

• Façade or roof insulation
• Replacement of central heating systems
• Mechanical ventilation, better meters, etc.

These works are expensive but can improve the energy rating of the building, which may:

• Increase resale value
• Reduce heating costs
• Protect rental potential against future restrictions

Example: a global energy retrofit at €400,000 for 30 units. An owner holding 3.5% of the shares pays €14,000. That €14,000 must be part of any serious buy or rent calculation, just like the potential uplift in property value.

How condo works are decided: voting rules and risks

In a condo, you don’t decide on works alone. They are voted at the general assembly according to specific majorities. Understanding these rules helps you gauge the likelihood and timing of the montant_travaux showing up in your budget.

Main voting rules (high level)

• Simple majority: most routine decisions and minor works are adopted if they win a majority of votes from owners present or represented.
• Absolute majority: more significant improvements require a majority of all owners (present, represented or absent).
• Reinforced/double majority: some heavy works or strategic decisions need a majority in number of owners and in shares.

The more expensive the project, the higher the majority threshold tends to be. But there are often mechanisms that allow a second vote with a softer majority if the first one fails.

What this means if you’re considering buying

When you compare buy or rent for a specific condo, you should check:

• The last 3 years of general assembly minutes
• Any works already voted but not fully paid
• Projects discussed (façade, roof, energy retrofit, elevator, etc.)

Example: you’re buying a 55 m² condo for €250,000 in a building where:

• Façade works worth €180,000 were voted last year
• Your share is 4.2%
• Two payment calls of €3,780 each remain

After buying, you’ll still have to pay €7,560 in works on top of:

• Your mortgage at 3.6%
• Property tax (say €1,000/year, increasing with time)
• Routine condo fees (say €1,500/year)

This radically changes the picture versus a simplistic “rent vs mortgage payment” view that ignores condo works.

Integrating renovation costs (montant_travaux) into a buy or rent model

A serious simulator cannot just compare monthly rent with a mortgage payment at 3.6%. It must integrate the montant_travaux parameter, which acts as an extra periodic or one‑off cost for the owner.

Numerical scenario comparison

Base assumptions:

• Mid‑size city, 50 m² condo
• Purchase price: €220,000 (existing building)
• Notary fees: 7.5% = €16,500
• Loan rate: 3.6% over 25 years
• Borrower insurance: 0.30% of the loan amount
• Property tax: €900/year (assumed +2%/year)
• Routine condo fees: €1,400/year
• Equivalent rent: €850/month, with 2% yearly increase (linked to an index like IRL)
• Investment rate if renting: 4%/year in a diversified ETF

Case 1: no major works for 15 years

You buy and the building needs no major works for 15 years, only routine maintenance already included in condo fees:

• Mortgage (principal + interest): ~€1,120/month
• Insurance: ~€55/month
• Property tax: €900/year initially
• Condo fees: €1,400/year

On the renting side:

• Rent: €850/month initially, rising 2%/year
• You invest your initial savings plus all the costs you avoid (notary fees, property tax, works) at 4%/year

In this scenario, buying can be competitive, maybe even better long term, depending on property price trends and inflation. But that’s not guaranteed: it depends on your situation, holding period and your discipline to invest as a renter.

Case 2: same property, but two major works

Now add some heavy condo works:

• Year 5: façade renovation, your share = €9,000
• Year 10: energy retrofit (insulation + boiler), your share = €12,000

Over 15 years you’ll pay €21,000 in works on top of:

• Mortgage payments
• Borrower insurance
• Property tax (rising each year)
• Routine condo fees

If you don’t have this cash, you must either:

• Draw from your savings (which could otherwise earn 4%/year)
• Or take a renovation loan, likely at a rate higher than your initial 3.6% mortgage

In a buy or rent comparison, the simulator should add these €21,000 under the montant_travaux parameter and spread them over the years when payments occur. On the renting side, the same €21,000 can instead be invested, improving the performance of the “rent + invest” scenario.

Are condo works a cost or an investment?

Condo works are not always a pure cost. Some projects, especially energy retrofits, are closer to an investment that may increase your property’s value.

Impact on resale value

Example: after an energy retrofit the building’s rating improves from F to C. You bought for €220,000 and paid €12,000 in works. On the local market:

• Efficient units sell at a 5–10% premium versus energy‑inefficient ones
• Rental demand is higher for well‑rated properties

If thanks to the retrofit you sell for €240,000 instead of €225,000, the €12,000 in works helped generate an extra €15,000 in sale price. In that case, the montant_travaux is partly offset by capital gains.

But there’s no guarantee. It depends on:

• Local supply and demand
• Mortgage rates at the time of resale
• Overall real‑estate price trends and inflation

A robust buy or rent simulator lets you test different assumptions for property appreciation and compare them with the actual cost of works.

How to anticipate condo works before buying

To avoid being blindsided by condo works, you need to investigate them before you sign.

Key documents to request

• The last 3 years of general assembly minutes
• The building’s maintenance log
• Any multi‑year works plan (if available)
• Technical or energy reports on the building

From these documents you can identify:

• Works recently completed (unlikely to recur soon)
• Works expected in the coming years (roof end‑of‑life, obsolete boiler, decayed façade)
• Budget estimates already discussed

You can then estimate an average annual renovation cost over your intended holding period (10, 15 or 20 years) and plug it into your buy or rent model as montant_travaux.

Practical calculation example

From the multi‑year plan you identify over 15 years:

• Roof: €120,000 (year 6)
• Central boiler: €80,000 (year 9)
• Façade: €200,000 (year 13)

Total: €400,000 for 32 units. Your share is 3.8%.

Your forecasted total: 400,000 × 3.8% = €15,200 over 15 years, or about €1,013/year on average, in addition to routine fees.

In the buy-or-rent.net simulator, you can input an average yearly montant_travaux of €1,000 to reflect this risk, instead of unrealistically assuming zero renovation costs.

Comparing with renting: rent indexation and investment returns

As a renter, you don’t pay condo renovations, but:

• Your rent usually increases annually, often linked to an index similar to the IRL
• You don’t benefit from any property appreciation
• You can invest your capital at an investment rate of 3–5%/year depending on risk

Simplified 15‑year comparison:

• Scenario A (buying): you pay €21,000 in works plus property tax and condo fees, but you own an asset that may keep pace with or beat inflation.
• Scenario B (renting): you avoid works but pay rent that rises each year; at the same time, you invest the savings versus ownership costs (notary fees, property tax, condo works, etc.) at, say, 4%/year.

Depending on assumptions (inflation, property tax increases, condo works, price appreciation), either scenario can come out ahead. There is no universal answer; it always depends on your personal situation, time horizon, risk profile and the real renovation costs in the building.

Conclusion: condo works must be part of any buy or rent decision

Condo renovations are one of the most underestimated items in a buy or rent analysis. Between a well‑maintained building with a clear multi‑year plan and a neglected condo facing imminent roof and façade works, the difference in montant_travaux over 15–20 years can be tens of thousands of euros.

Before deciding whether to buy or rent:

• Review the building documents carefully
• Estimate a realistic yearly renovation budget
• Include this, along with mortgage rate, property tax, inflation and your potential investment rate as a renter, in your comparison

This article is not personalized financial advice. The right choice between buy or rent depends on your own numbers and constraints.

To see the real impact of condo renovations on your budget and your buy or rent decision, test different scenarios using the montant_travaux parameter in our simulator. Simulate your situation on buy-or-rent.net.