Investment: Is this free plan hiding an extra cost?
Hello, it’s Lionel. A free plan does not necessarily hide an extra cost, but you need to check the services included, paid options and subscription terms before committing. In real estate, the real risk often comes from hidden fees that appear after the first estimate. Start by comparing the project’s total cost, not just its starting price.
Start here: check what the free plan includes
- Ask whether the plan includes only a sketch or also technical drawings.
- Find out how many revisions are included.
- Check whether the thermal study, permit application and project oversight are billed separately.
- Ask for an itemized estimate listing the options and additional costs.
- Read the subscription terms and cancellation conditions, if applicable.
A free plan can serve as an initial sales pitch: the design appears to be free, then essential services are offered at an extra charge. To set your budget, also compare the hidden costs of an investment and the additional costs of a low-energy home.
Free plan: where do hidden fees crop up?
The term “free” can refer to an initial study, an estimate or a standard plan. It does not always mean that construction drawings, administrative procedures and construction oversight are included.
A common anecdote: an investor receives an initial proposal at no charge, then discovers that plan revisions and the thermal study are billed separately. The best approach is to ask for the final price before paying a deposit or signing.
“A clear price is judged by the total, not by the first line of the estimate.” This rule helps distinguish a genuinely attractive offer from pricing that shifts part of the bill elsewhere.
Energy-efficient homes: measure the additional cost without comparing unlike offers
For a passive house, available estimates put the additional cost at around 15 to 25% compared with a standard RE2020 home, and 25 to 35% compared with an RT2012 reference home, depending on the model and location. For 120 m², this can amount to approximately €30,000 to €60,000 extra.
This amount depends in particular on insulation, triple glazing, a balanced heat-recovery ventilation system and airtightness. Compare estimates for the same level of finish; otherwise, the lowest price may simply exclude important equipment.
| Item to compare | What may be included | What to check |
|---|---|---|
| Initial plan | Sketch or standard plan | Number of revisions and technical drawings |
| Studies | Thermal study or site analysis | Services billed separately |
| Equipment | Insulation, glazing, ventilation | Product range, installation and contractual warranties |
| Support | Administrative procedures and construction oversight | Duration and fees outside the package |
Profitability: compare future savings with the upfront cost
A passive house can significantly reduce heating bills. Available estimates suggest around €100 to €300 per year, compared with €1,000 to €2,000 for an RE2020 home, depending on the climate, usage and energy prices. The annual difference may therefore range from around €800 to €1,700.
A return on investment of between 10 and 15 years is sometimes cited, but it depends on the actual additional cost paid and the savings achieved. An A-rated energy performance certificate is not automatic: the design and construction quality must be checked for each project.
If it is just a free sketch, ask the price of complete plans before proceeding. If it is an offer for an energy-efficient home, compare the additional cost with the likely savings and maintenance expenses.
A three-step process to avoid unpleasant surprises
- Step 1: ask for a written list of the included services, options and any potential fees.
- Step 2: compare at least two proposals based on the same floor area, equipment and level of finish.
- Step 3: check the subscription terms, payment deadlines and cancellation clauses before signing.
This method takes a little time, but it makes price transparency verifiable. It also lets you assess profitability based on the full cost rather than a sales promise.
Real estate budget: make a decision based on your project
A free plan can be useful for exploring an idea or getting an initial estimate. It becomes worthwhile if the limits of the service are clearly stated in writing and you can decline the options without penalty.
For a rental investment, also include expenses, renovation work and financing costs in your calculations. Energy savings make a home more attractive, but they do not automatically offset an excessively high purchase or construction price.
Questions to ask before accepting the offer
- Exactly what document will be provided for free?
- What fees may arise if the project changes?
- Does the price include the studies and oversight?
- Is the estimate fixed, and for how long?
- Can you keep the plans if you do not proceed with the service provider?
A well-costed project is not based on a promise of free services, but on a clear estimate, defined needs and anticipated additional costs. This comparison helps you protect your budget and assess profitability methodically.
Frequently asked questions about free plans and additional costs
Is a free plan really free of charge?
Not always. It may be an initial sketch or estimate, while technical drawings, revisions and studies may be billed separately. Ask for a written breakdown of the services.
What additional cost should I expect for a passive house?
Estimates vary depending on the reference and the project: around 15 to 25% compared with a standard RE2020 home, and more compared with an older RT2012 reference. For 120 m², a range of €30,000 to €60,000 is sometimes cited, depending on the model and location.
How long can it take for the savings to offset the additional cost?
Some estimates suggest 10 to 15 years, but the timeframe depends on the upfront cost, climate, how the home is used and energy prices. Run your calculations using several scenarios rather than relying on a single assumption.
What should I check in the subscription terms?
Check the commitment period, cancellation fees, payment deadlines, included services and renewal terms. Ask for a copy of the terms before providing your bank details.
Thank you for reading this far. With friendship; Lionel “PS; Leave me a comment, I’ll reply personally
