Buying an energy sieve without MaPrimeRénov’: 5 cities where the maths still work

In estate-agent WhatsApp groups, one question keeps coming back: “So… is it still worth buying an energy sieve now?” Agents report fewer viewings. Some vendors start to panic, while others refuse to budge. Buyers hesitate too - do they hang on in case politicians step in, or do they act before prices shift again?

Away from the headlines, transactions are still going through - but mainly in a handful of towns where the sums still, stubbornly, work. And they can work even without a single euro of public subsidy.

The surprising twist: the strongest opportunities aren’t always in the places you’d assume.

Where the maths still work: 5 cities that quietly reward brave renovators

On a dull Tuesday in Saint-Étienne, a young couple leaves a notary’s office carrying a thick stack of paperwork, looking slightly dazed. They’ve just bought a 62 m² flat rated F for less than the cost of a brand-new small car. The agent had been blunt: “You’ll need to redo everything.” They agreed - because their renovation budget was already calculated down to the last euro.

Moments like that didn’t vanish when MaPrimeRénov’ was suspended. They simply shifted location. Instead of overheated areas, they’ve moved to quieter markets where prices are still low enough to absorb a 30,000 or 40,000 euro renovation without wrecking the entire plan.

At the moment, five cities keep cropping up for this bold, slightly stubborn approach: Saint-Étienne, Limoges, Le Mans, Mulhouse and Perpignan.

In Saint-Étienne, DPE F or G flats can still sell for around 900 to 1,100 €/m² - and sometimes even less when the work required is substantial. That means a 60 m² energy sieve can be picked up at around 60,000 €, then brought up to a respectable D with 25,000 to 35,000 € of serious works (insulation, windows, heating). The maths is easy to see: agents will quietly point out that renovated equivalents in the same area can edge up towards 1,500 €/m².

Limoges sits in a similar bracket. Lots of older stone buildings from another time, often with poor insulation. But the entry prices remain so accessible that, even without help, the renovation spend doesn’t automatically destroy the yield. A small 3-room flat rated G, bought at a discount and then upgraded through proper works and a better DPE? On paper, there’s still room for a margin - and rental demand is steady enough to cope with a few months of building work.

These stories don’t tend to hit prime-time television. They play out in corridors that smell of dust and old wallpaper.

So why these five places - and not Bordeaux or Lyon? It boils down to a straightforward rule: the lower the purchase price, the easier it is to carry a major renovation budget without your total cost per square metre exploding. Buy an energy sieve at 5,000 €/m² in a hot market, then add 800 €/m² of works without subsidy, and it quickly becomes uncomfortable. In Saint-Étienne or Mulhouse, that same 800 €/m² can transform the property while keeping you below replacement cost.

The next driver is the DPE gap. The further a home is from a “decent” rating, the bigger the potential value uplift after renovation. Taking an F and turning it into a strong C in a lively rental pocket of Le Mans doesn’t just reduce void periods - it can shift the tenant profile, support a higher rent, and widen the buyer pool when you come to sell. In markets where families and younger workers want homes that won’t cause headaches, that difference matters.

Finally, there’s local pressure on supply. Perpignan and Mulhouse won’t become Paris overnight, but they do contain micro-areas with strong rental demand, good connections and expanding employment. In those specific zones, refurbishing an energy sieve is less about betting on subsidies and more about backing what the city could look like over the next decade.

How to make an energy sieve profitable without MaPrimeRénov’

Investors who are still buying energy sieves today tend to share one habit: they do their sums with the obsession of an accountant - before they even book a viewing. Purchase price, notary fees, renovations item by item, expected void period, insurance, finance costs. They don’t just “stick 20,000 € on top for works”. They demand detailed quotes, compare trades, and run several scenarios, including a pessimistic one.

A practical rule of thumb has emerged. Only target a property where, once you include everything (purchase + all works + costs), your final €/m² comes in at least 15–20 % under the going rate for already-refurbished equivalents on the same street. That buffer is what protects you if something goes wrong: a rotten beam, a joiner hiking prices, or a boiler failing sooner than planned.

With MaPrimeRénov’ no longer acting as a comfort blanket, that margin stops being optional. It becomes survival.

There’s another shared trait among buyers who aren’t panicking about the subsidy freeze: they don’t base the deal on hypothetical future support. A landlord in Le Mans put it simply recently: he buys as if “no public euro will ever arrive”. If aid returns later, fine. If it doesn’t, the project still needs to make money.

A real example from Mulhouse: a 75 m² flat rated G, purchased for 65,000 €. The investor spent roughly 40,000 € on works - internal insulation, new windows, a heat pump-type system, plus a full internal refurb. That makes 105,000 €, plus 8 % costs. All-in, it comes to around 1,500 €/m². Comparable refurbished homes nearby were selling at about 1,900 €/m². Even with flat prices, the margin remains. The DPE rises to C, the rent increases, and the exit route stays viable.

On a spreadsheet it looks simple. In reality it can mean three months spent phoning trades, chasing quotes, and lying awake wondering whether the electrician will actually keep to the schedule.

The logic is almost ruthless: without MaPrimeRénov’, you cannot expect the state to rescue a bad purchase. If you overpay, or miss structural problems, no subsidy arrives to tidy up the mistake. That’s why serious buyers now talk less about schemes and more about audits - an energy audit, yes, but also a hard look at the structure: roof, load-bearing walls, ventilation and damp.

Upgrading an F or G to a D or C without any help can still be rational when three conditions align. First, rental demand has to be strong enough that the home lets quickly, even with a slightly higher rent justified by a better DPE. Second, the works must deliver a genuine comfort improvement - thermal, acoustic and layout. Third, you need a clear financial plan: either hold long term for cash flow, or sell for a capital gain once the building is sound.

To be honest: nobody enjoys digging through 40-page DPE reports. But in the current climate, those fine details can matter more than the latest political promise about future schemes.

Mindset and tactics: playing the long game with no safety net

One piece of advice that often comes up in these five cities is to begin with a single small unit rather than buying an entire building. A 40–50 m² energy sieve is enough to learn how local trades operate, how the council approaches permissions, and how DPE assessors calculate ratings. It keeps your risk contained while teaching you almost everything you’ll need before taking on bigger projects.

Another approach - especially while interest rates remain high - is to focus on negotiating the purchase price rather than trying to shave every last euro off the works. A 5 % reduction can translate into 8,000 or 10,000 € saved immediately. Renovation quotes often have less wiggle room. And with MaPrimeRénov’ frozen, sellers of energy sieves know their leverage has weakened. That’s where the negotiating space is hiding.

Some purchasers even add conditional clauses linked to structural inspections, so they don’t discover a disaster only after signing.

Everyone knows the feeling: you walk into a flat and instantly fall for the fireplace, the mouldings, the old balcony. In these markets, buying with your heart can sink the entire project. Renovating without aid requires a kind of cool, self-protective kindness: you stop your future self from inheriting a property that will swallow your savings. So you say no more often. You leave behind charming flats in poor locations on noisy roads, even when the asking price looks irresistible.

The mistakes that crop up repeatedly? Underpricing the cost of bringing electrics up to standard, overlooking ventilation, dismissing damp, assuming the DPE “will magically improve” with only new windows. And then there’s timing: many owner-investors schedule three months of works that become six, with rent delayed while the mortgage still bites every 30 days.

Yet when the numbers and the plan are genuinely solid, a strange calm appears. You’re no longer waiting for a decree to tell you whether the project makes sense.

“I stopped betting on subsidies the day I realised the rules changed faster than my works progressed,” confides a small landlord in Perpignan. “Now I buy only when the deal stands on its own two feet, even if the state gives me zero.”

That change in mindset produces a more strategic - almost minimalist - set of priorities:

• Hunt for genuinely underpriced energy sieves in cities with real rental demand.
• Run the project numbers as if MaPrimeRénov’ never existed.
• Aim for a genuine DPE jump (G to D or C), not a cosmetic refresh.
• Line up reliable trades before you sign, not afterwards.
• Hold back at least 10–15 % contingency on the works budget.

It isn’t a glamorous checklist. But for people still searching in Saint-Étienne, Limoges, Le Mans, Mulhouse or Perpignan, it’s what separates an investment that matures well from a long, costly regret.

A new game board for investors willing to think beyond subsidies

For many homeowners who had already booked works and arranged finance, the sudden freezing of MaPrimeRénov’ feels like a betrayal. Online, the anger is loud - and, frankly, understandable. Still, beneath the noise, a quieter shift is underway: a wave of small investors and future owner-occupiers is learning to make decisions without using public support as a crutch.

In these five cities - where prices haven’t spiralled - renovating an energy sieve can still be a way to create genuine value rather than simply chasing a state cheque. It forces tougher questions: would I still buy this home if subsidies never returned? Does the area have a future in ten or fifteen years? Am I renovating for a label… or for the people who will actually live there?

Without MaPrimeRénov’, attention moves away from announcements in Paris and back to local realities: rents, employment, transport, community life - and the hard, cold price of a heating system. Plenty of projects won’t survive that level of clarity. The ones that do may be tougher, more considered, a little slower, but better constructed. And on a quiet evening, away from the headlines, that may be where the next solid investments begin.

Key point	Detail	Why it matters to you
Target the right cities	Saint-Étienne, Limoges, Le Mans, Mulhouse, Perpignan still offer low prices and genuine rental demand	Spot where a renovation project can remain profitable without aid
Do the sums without subsidies	Include purchase, works, fees and void periods, and aim for a final price at least 15–20 % below the refurbished market level	Understand whether a property still stacks up even if MaPrimeRénov’ never returns
Aim for a real DPE leap	Move from F/G to D or C by tackling insulation, heating and ventilation rather than cosmetics	Improve value, comfort and long-term rental appeal

FAQ:

• Is it still worth buying an energy sieve while MaPrimeRénov’ is suspended? Yes, in markets where prices are low enough and rental demand solid. The key is to run all numbers as if you will never receive a euro of public aid, and only move forward if the deal works under that assumption.
• Which types of properties are the most interesting to renovate without subsidies? Undervalued small flats or modest houses in dynamic neighbourhoods, with a big DPE gap (F or G) and clear potential to reach D or C through serious works, not just fresh paint.
• How can I estimate a realistic renovation budget? Get at least two detailed quotes, line by line, include structural items (roof, electricity, heating, windows, insulation), add 10–15 % contingency, and talk to local investors or craftsmen about typical overruns.
• Should I wait for MaPrimeRénov’ to come back before starting a project? If your project only makes sense with generous subsidies, it’s fragile. If it stands on its own feet financially today, any future aid will be a bonus, not the foundation of your plan.
• How do I limit the risk of a bad deal on an energy sieve? Target cities with proven rental demand, negotiate firmly on the purchase price, demand structural and energy audits, start with a small project, and avoid betting on speculative price jumps in already overheated markets.

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