a 100 m² house renovation prices varies considerably depending on the condition of the house, the extent of the work, the materials chosen, and the region. However, you should generally budget between €20,000 and €250,000.
Are you planning to renovate your 100 m² house ? It’s a project that can quickly become complex and expensive. How much does a renovation of this scale actually cost? The price of a renovation depends on many factors such as the condition of your house , the extent of the work ( complete or partial renovation ), the choice of materials and the finishes .
Home renovations can improve your comfort, increase the value of your property, and save energy through energy-efficient renovations . However, it’s essential to establish a realistic budget before embarking on this type of project.
In this article, we’ll help you see things more clearly by providing an estimate of the average cost of renovating a 100 m² house . We’ll also detail the various cost items and outline the financial assistance you’re eligible for.
Overall estimate of for a 100 m² house renovation budget
Understanding the cost of renovating a 100 m² house is essential for planning your budget.
Average overall cost of a complete renovation
Home renovation price range
Type of Renovation | Average Price | Details |
Light renovation | 50 000 € – 80 000 € | Cosmetic work |
Complete renovation | 80 000 € – 150 000 € | Complete renovation |
Energy renovation | 30 000 € – 60 000 € | Insulation, heating |
Factors influencing the price of home renovation
Several elements impact the renovation cost:
▪️ the initial state of the house,
▪️ the type of renovation work,
▪️ The quality of the materials,
▪️ the geographical location of the property,
▪️ and the complexity of the work.
Calculation of the price per m² of renovation
The price of a house renovation generally varies between €800 and €2,000 per m² .
Simplified calculation:
▪️ Surface : 100 m²
▪️ Average price per m²: €1,200
▪️ Estimation budget : 120 000 €
Breakdown of main costs
Later | % you Budget | Estimated Amount |
Structural work | 30 % | 36 000 € |
Thermal insulation | 20 % | 24 000 € |
Electricity | 10 % | 12 000 € |
Plumbing | 10 % | 12 000 € |
Finishes | 20 % | 24 000 € |
Divers | 10 % | 12 000 € |
Key points to remember
▪️ Renovating a house requires careful planning
▪️ The renovation budget varies depending on the work
▪️ Always anticipate a 10-15% reserve
Practical advice
▪️ Get several home renovation quotes
▪️ Compare prices for 100 m² house renovations
▪️ Evaluate your financial aid
▪️ Prioritize essential work
Focus: energy renovation price for a 100 m² house
Energy renovation represents a crucial investment:
▪️ Long-term energy savings
▪️ Valuation of real estate
▪️ Reduction of charges
Main energy efficiency works
Type of Work | Benefits | Average Cost |
Attic insulation | -30% consumption | 5 000 – 10 000 € |
Window replacement | -25% loss | 10 000 – 15 000 € |
High-performance heating system | -40% energy | 8 000 – 12 000 € |
Technical point: bathroom renovation
Bathroom renovation represents a significant item:
▪️ Average budget: €5,000 – €15,000
▪️ Significantly increases the value of your property
▪️ Kitchen and bathroom work often combined
Focus on financial aid
Several devices exist:
▪️ MaPrimeRénov’
▪️ Tax credit
▪️ Energy Savings Certificates (ESC)
▪️ Zero-interest eco-loan
💡 Expert advice : a preliminary technical diagnosis will help you refine your home renovation budget and avoid unpleasant surprises.
Main expenditure items in the renovation of a 100 m² house
Detailed costs of insulation work
Type d’isolation | Average price | Energy impact |
Attic insulation | 30-50 €/m² | ★★★★★ |
Wall insulation | 50-100 €/m² | ★★★★ |
Window insulation | 300-500 €/unit | ★★★ |
Key points of energy renovation:
▪️ Potential energy savings: up to 40%
▪️ Financial aid available
▪️ Priority renovation work
Heating and water production systems
System | Installation cost | Annual savings |
Heat pump | 10 000-15 000€ | 50-70 % |
Condensing gas boiler | 3 000-5 000€ | 20-30 % |
Thermodynamic water heater | 1 500-3 000€ | 60-70 % |
Renovation of interior spaces
Renovation price per room
Piece | Average renovation cost | Main works |
Cuisine | 5 000-15 000€ | Furniture, household appliances |
Bathroom | 3 000-10 000€ | Tiling, sanitary facilities |
Bedroom | 1 500-3 000€ | Painting, floor |
Bathroom renovation focus:
▪️ Average price: €6,500
▪️ Essential works
▪️ Choice of equipment
Kitchen and fittings
Kitchen renovation strategies :
▪️ Renovation budget: €8,000 on average
▪️ Space optimization
▪️ Choice of materials
Structural and technical works
Electrical repairs
Main positions :
▪️ Upgrading: €50-100/m²
▪️ Electrical panels: €500-1,500
▪️ Light points: 100-300 €/piece
Plumbing and sanitation
Renovation costs:
▪️ Complete network: €3,000-8,000
▪️ Pipe replacement
▪️ Compliance
Summary of renovation costs
Typical budget breakdown:
▪️ Isolation : 30 %
▪️ Electricity: 15%
▪️ Plumbing: 20%
▪️ Kitchen/Bathroom: 25%
▪️ Divers : 10 %
Tips for controlling costs
Saving strategies:
▪️ Compare multiple quotes
▪️ Stagger the work
▪️ Prioritize financial aid
▪️ Choose sustainable materials
▪️ Opt for a partial renovation if your budget is limited
Financial aid for renovation
Types d’aides :
▪️ MaPrimeRénov’
▪️ Energy savings certificates
▪️ Zero-interest eco-loan
▪️ Tax credit
▪️ Local aid
Sustainable development focus
Criteria to consider:
▪️ Recognized Environmental Guarantor Label
▪️ Eco-friendly materials
▪️ Energy performance
▪️ Reduction of carbon footprint
Crucial point : each home renovation project is unique and the renovation price depends on multiple factors.
💡 Pro tip : Always prepare a detailed estimate before starting your home renovation work.
Factors that influence the price of renovating a 100 m2 house
Variations by geographic location
Region | Impact on renovation prices | Comments |
Île-de-France | +30 % | High labor costs |
Large metropolises | +25 % | Significant urban constraints |
Rural areas | – 15 % | More competitive artisan prices |
Factors influencing home renovation costs
▪️ Local regulations vary
▪️ Prices of materials vary depending on the region
▪️ Tension in the renovation market
Determining criteria for estimating work
State of the house | Impact budget | Types of work required |
Good general condition | Low additional cost | Partial renovation |
Average condition | Moderate additional cost | Energy renovation work |
Dilapidated | Significant additional cost | Complete renovation |
Main points of attention
▪️ Preliminary technical diagnosis
▪️ Assessment of structural disorders
▪️ Mandatory compliance
Focus on energy renovation work
Heating systems and thermal insulation
Type of work | Average cost | Energy savings |
Attic insulation | 50-100 €/m² | Up to 25% |
Window replacement | 500-1000 €/window | Up to 15% |
High-performance heating system | 5000-10000 € | Up to 30% |
Financial aid available
▪️ MaPrimeRénov’
▪️ Energy Savings Certificates (ESC)
▪️ Zero-interest eco-loan
▪️ Specific local aid
Details of prices for 100 m² house renovations by type of work
Bathroom and kitchen renovation
Space | Renovation price | Main works |
Bathroom | 5000-15000 € | Tiling, plumbing, furniture |
Cuisine | 8000-20000 € | Electricity, furniture, household appliances |
Parameters complicating the renovation price
▪️ Surface area of the works
▪️ Quality of the materials chosen
▪️ Technical complexity
▪️ Desired level of finish
Strategies to control home renovation costs
▪️ Get multiple quotes
▪️ Prioritize work
▪️ Stagger interventions
▪️ Compare material prices
▪️ Negotiate with craftsmen
Critical points to watch out for regarding 100 m2 house renovation prices
Later | Financial risk | Advice |
Structural work | Pupil | In-depth diagnosis |
Electricity | AVERAGE | Upgrading to standards |
Plumbing | AVERAGE | Full check |
Isolation | Weak | Choice of suitable materials |
Final recommendations
- Favor RGE (Recognized Environmental Guarantors) craftsmen
- Anticipate a contingency budget of 10-15%
- Calculate the return on investment
- Evaluate potential energy savings
💡 The average cost of renovating a 100 m² house varies between €50,000 and €100,000, depending on the work carried out and the location.
Successfully complete your 100 m2 renovation without any nasty surprises
Key points to remember for your renovation project
Renovating a 100 m² house represents a significant investment. Every decision counts and directly impacts your final budget. Here are the keys to a successful renovation:
Budgetary strategy
- Prepare a precise and realistic budget
- Anticipate a financial reserve of 10-15%
- Systematically compare quotes
- Prioritize your work
Technical approach
- Carry out a complete diagnosis before work
- Prioritize quality over immediate savings
- Think energy performance
- Choose RGE certified craftsmen
Investment vs. Valuation
A well-thought-out renovation project allows you to:
- Increase the real estate value of your property
- Significantly reduce your energy bills
- Improve your comfort of life
- Modernize your home
💡 Key figure: a well-designed renovation can generate up to 20% added real estate value.
Final tips
▪️ Never underestimate the complexity of a renovation
▪️ Communicate regularly with your craftsmen
▪️ Keep flexibility in your schedule
▪️ Document each step of your work
Long-term vision
Your renovation is not just a cost, it’s an investment:
▪️ in your heritage,
▪️ in your comfort,
▪️ in future economies.
Summary table: your project in a few figures
Aspect | Estimation |
Budget global | 50 000€ – 100 000€ |
Average duration | 3-6 months |
Energy savings | 20-30 % |
Real estate capital gains | Up to 20% |
Next steps
▪️ Establish an accurate diagnosis
▪️ Consult several professionals: renovation company , architectural firm .
▪️ Set up your financing plan
▪️ Schedule your work
🚀 Your renovation project starts now!
FAQ: Everything you need to know about renovating your 100 m² house
Who are the essential craftsmen for a renovation?
For a successful renovation, it’s essential to call upon a variety of trades. Essential tradespeople are generally: a mason for structural work, a plumber for sanitary installations, an electrician for electrical installations, a painter for finishing touches, and possibly a tiler or carpenter, depending on the work to be carried out.
How to choose a good craftsman?
Choosing a craftsman is a crucial step. Request several quotes , compare prices and the services offered. Check the craftsman’s guarantees and insurance. Don’t hesitate to ask to see their work and read online reviews.
What is the average duration of a renovation?
The duration of a renovation depends on the scope of the work. A light renovation can be achieved in a few weeks, while a major renovation can take several months. It’s important to allow for a comfortable timeframe and account for possible unforeseen events.
How to finance a renovation?
There are several solutions available to finance your renovation work . You can apply for a consumer loan , take out a zero-interest eco-loan for energy efficiency work , or benefit from government aid such as the energy transition tax credit .
What are the latest trends in renovation?
Renovation trends are evolving rapidly. There is a strong demand for eco-friendly materials and energy-efficient solutions . Exterior openings are also highly valued, as are open, bright living spaces .
How to estimate the cost of a renovation online?
Many online calculators allow you to estimate the cost of a renovation . However, these tools can only give you a rough idea. For an accurate quote , it is recommended to contact several tradespeople .
What administrative procedures must be completed before starting work?
Administrative procedures vary depending on the scope of the work. For some projects, a prior declaration of work is sufficient. For larger projects, a building permit may be required. Check with your local town hall.
How much does it cost to renovate the energy efficiency of a 100 m² house?
Energy renovation of a 100 m² house represents an investment of between €20,000 and €50,000. This budget includes attic and wall insulation, window replacement, and heating and ventilation system upgrades. Thermal insulation can cost around €100 per m². Window replacement ranges from €500 to €1,000 per opening. A new, efficient heating system costs between €5,000 and €10,000. This work can save up to 30% on energy bills.
How long does a complete renovation of 100 m² take?
A complete renovation of 100 m² typically lasts between 3 and 6 months. The duration varies depending on the complexity of the work, the number of contractors, and unforeseen circumstances. A partial renovation can take 2-3 months, while a complete energy-efficient renovation can take up to 6-8 months. The main steps include the assessment, administrative permits, structural work, electrical work, plumbing, insulation, and finishing touches. Allow extra time for possible delays or unforeseen discoveries during the work.
How to insure your construction site?
It’s important to insure your construction site to protect yourself in the event of damage. Construction damage insurance is mandatory for certain types of work. Don’t hesitate to contact your insurer for further information.
