Renovating a Prestige Villa: Complete Works and Budget Guide

Renovation, a Strategic Investment

Renovating a prestige villa on the French Riviera or in Monaco represents much more than simple compliance updates. It's an opportunity to create a tailored living space, optimize energy performance, and significantly enhance your real estate assets. However, these projects require rigorous planning and sharp expertise.

This complete guide walks you through all stages, essential budget items, and pitfalls to avoid for successful high-end renovation.

Why Renovate Rather Than Buy New?

Renovation Advantages

Exceptional locations: Old properties occupy the best locations (seafronts, panoramic hillsides, historic centers) impossible to obtain in new construction.

Preserved architectural character: Maintain the soul of a Belle Époque or Art Deco villa while enjoying modern comfort.

Generous plots: Old parcels offer garden surfaces far superior to new programs.

Superior appreciation: Quality renovation can generate 30 to 50% added value on property value.

Total customization: Create exactly the living space you dream of.

When to Consider Renovation?

EPC class E, F, or G (soon banned for rental)
Obsolete electrical and plumbing installations
Insufficient thermal and acoustic insulation
Dated interior layouts
Desire to modernize while keeping location

Different Renovation Levels

Light Renovation (Refreshing)

Budget: €500 to €1,000/m²

Included works:

Interior and exterior painting
Floor coverings (parquet, tiles)
Equipped kitchen (appliances and furniture)
Bathrooms (tiles, sanitary)
Lighting and decoration

Duration: 2 to 4 months

Ideal for: Villas in good general condition requiring aesthetic updating.

Standard Renovation (Complete)

Budget: €1,500 to €3,000/m²

Included works:

All light renovation items
Complete electricity (panels, wiring, outlets)
Plumbing (piping, boiler, water heater)
External joinery (double-glazed windows)
Thermal insulation
Reversible air conditioning
Terraces and basic outdoor fittings

Duration: 6 to 12 months

Ideal for: Villas requiring complete compliance and comfort improvement.

High-End Renovation (Prestige)

Budget: €3,000 to €6,000+/m²

Included works:

All complete renovation items
Noble materials (marble, natural stone, exotic woods)
Complete home automation (lighting, shutters, heating, security)
Professional custom kitchen (La Cornue, Gaggenau)
Spa bathrooms (hammam, sauna, jacuzzi)
Underground climate-controlled wine cellar
Heated pool with counter-current swimming system
Premium landscaping
Home cinema and private gym
Integrated security system (video surveillance, alarm)

Duration: 12 to 24 months

Ideal for: Creating exceptional property with ultra-luxurious amenities.

Structural Renovation (Heavy)

Budget: €4,000 to €8,000+/m² (even more depending on scope)

Included works:

All high-end items
Structure modification (load-bearing wall removal, extension)
Foundation reinforcement
Complete roof and framework renovation
Floor or basement creation
Complete facade restoration
Seismic compliance (if necessary)

Duration: 18 to 36 months

Ideal for: Complete property transformation, quasi-reconstruction.

Detailed Budget Items

1. Structural Work (15-25% of budget)

Masonry:

Foundation repair: €20,000 to €100,000+
Opening creation (load-bearing walls): €5,000 to €15,000 per opening
Extension: €2,000 to €4,000/m²

Roof and framework:

Complete renovation: €150 to €400/m² of roof surface
Roof insulation: €50 to €150/m²
Zinc work and waterproofing: €80 to €200/m²

Facades:

Simple restoration: €80 to €150/m² of facade
Restoration with external insulation: €150 to €300/m²
Superior quality coating: €100 to €200/m²

2. Second Work (30-40% of budget)

Electricity:

Complete installation: €100 to €200/m² habitable
Home automation: €50 to €150/m² additional
Electrical panel: €2,000 to €5,000

Plumbing and heating:

Complete installation: €100 to €150/m²
High-efficiency boiler: €8,000 to €20,000
Heat pump: €15,000 to €40,000
Floor heating: €80 to €120/m²

Joinery:

Double-glazed aluminum windows: €600 to €1,500/m²
Sliding French windows: €1,500 to €4,000 per bay
Motorized roller shutters: €500 to €1,200 per shutter
Reinforced entrance door: €3,000 to €10,000

Insulation:

Internal wall insulation: €50 to €90/m²
External insulation: €120 to €200/m²
Attic insulation: €30 to €70/m²

Air conditioning:

Multi-split reversible air conditioning: €1,500 to €3,000 per room
VRV system for large villa: €30,000 to €80,000

3. Interior Finishes (20-30% of budget)

Floor coverings:

High-end solid parquet: €100 to €300/m²
Premium tiling (marble, stone): €150 to €500/m²
Luxury carpet: €80 to €200/m²

Paint and decoration:

High-end paint: €30 to €60/m²
Luxury wallpapers: €50 to €200/m² (supply + installation)
Moldings and cornices: €40 to €150/linear meter

Kitchen:

Standard equipped kitchen: €15,000 to €40,000
High-end kitchen: €50,000 to €150,000+
Custom professional kitchen: €100,000 to €300,000+

Bathrooms:

Standard bathroom: €10,000 to €25,000
Luxury bathroom: €30,000 to €80,000+
Master suite with spa: €80,000 to €200,000+

4. Outdoor Developments (15-25% of budget)

Pool:

Classic 8x4m in-ground pool: €30,000 to €50,000
Infinity pool: €50,000 to €100,000
Mirror pool with high-end system: €100,000 to €250,000+
Equipped pool house: €30,000 to €100,000

Terraces and exteriors:

Exotic wood terrace: €150 to €300/m²
Natural stone terrace: €100 to €250/m²
Bioclimatic pergola: €15,000 to €50,000

Landscaping:

Mediterranean garden creation: €80 to €200/m²
Automatic watering: €15 to €40/m²
Outdoor lighting: €5,000 to €30,000
High-end motorized gate: €8,000 to €25,000

5. Special Equipment (5-15% of budget)

Security:

Complete alarm system: €5,000 to €20,000
Video surveillance (8-16 cameras): €8,000 to €25,000
Biometric access control: €3,000 to €10,000

Comfort:

Home cinema: €20,000 to €100,000+
Equipped gym: €15,000 to €50,000
Custom underground wine cellar: €20,000 to €80,000
Private elevator: €40,000 to €100,000

Energy:

Photovoltaic solar panels: €15,000 to €40,000
Rainwater recovery system: €5,000 to €15,000

Overall Budget Examples

200 m² Villa - Standard Complete Renovation

Situation: 1970s villa, good structural condition, Nice Cimiez Objective: Complete compliance, modernization

Item	Budget
Structural work (roof, facade)	€60,000
Electricity and home automation	€35,000
Plumbing and heating	€40,000
Joinery (10 windows, 4 bays)	€30,000
Complete insulation	€20,000
Floor coverings	€25,000
Paint and finishes	€15,000
Equipped kitchen	€30,000
3 Bathrooms	€45,000
Air conditioning	€18,000
Renovated pool	€25,000
Terraces and exteriors	€30,000
Landscaping	€20,000
Security and home automation	€12,000
TOTAL WORKS	€405,000
Architect/project management fees (10%)	€40,500
Contingencies (10%)	€40,500
OVERALL BUDGET	€486,000

i.e.: ~€2,430/m²

350 m² Villa - High-End Renovation

Situation: Belle Époque villa, Cap d'Antibes Objective: Prestige renovation with luxurious amenities

I	Budget
Structural work	€150,000
Electricity, complete home automation	€100,000
Plumbing, heat pump	€90,000
High-end joinery	€80,000
High-performance thermal insulation	€50,000
Floor coverings (marble, solid parquet)	€100,000
Paint, moldings, decoration	€60,000
Custom professional kitchen	€120,000
5 Suites with luxury bathrooms	€200,000
VRV air conditioning	€60,000
Infinity pool + pool house	€150,000
Natural stone terraces	€80,000
Premium landscaping	€100,000
Security, video surveillance	€40,000
Wine cellar, home cinema	€80,000
Private elevator	€70,000
TOTAL WORKS	€1,530,000
Architect fees (12%)	€183,600
Contingencies (15%)	€229,500
OVERALL BUDGET	€1,943,100

i.e.: ~€5,552/m²

Steps for Successful Renovation

Phase 1: Preparation and Design (2-4 months)

1. Complete technical assessment

Structural condition (foundations, walls, roof)
Asbestos, lead, termite assessment
Energy performance (EPC)
Electrical and plumbing installations
Cost: €2,000 to €5,000

2. Program definition

Your needs and desires
Available budget
Desired timelines
Regulatory constraints

3. Architect selection

Architect specialized in prestige renovation
Verified references
Personal chemistry
Fees: 8 to 15% of works amount

4. Project design

Plans and elevations
Material choices
Precise costing
Building permit file

Phase 2: Administrative Procedures (2-6 months)

Building permit (if facade modification, surface creation >20m²):

Town hall filing
Review: 2 to 3 months
Third-party appeal period: 2 months
Total: 4 to 6 months minimum

Prior declaration (lighter works):

Review: 1 month
Appeal period: 2 months

ABF (Architect of Historic Buildings):

If protected sector or historic monument
Additional delays of 1 to 3 months
Strict aesthetic constraints

Phase 3: Company Consultation and Selection (1-2 months)

Call for tenders:

Minimum 3 companies per trade
Detailed and comparable quotes
Insurance verification (ten-year liability)
References and site visits

Selection criteria:

Price (but not only)
Service quality
Proposed timelines
Financial solidity
Feeling and trust

Phase 4: Construction (6-24 months depending on scope)

Organization:

Detailed schedule with milestones
Weekly site meetings
Rigorous budget monitoring
Hazard management

Intervention order:

Demolition and structural work
Second work (electricity, plumbing, joinery)
Insulation and partitions
Interior finishes
Outdoor developments

Works reception:

Detailed visit with architect
List of reservations
Lifting of reservations
Perfect completion guarantee (1 year)

Specific Regulatory Constraints

PLU (Local Urban Plan)

Each municipality has its rules:

Maximum construction height
Land footprint
Distances from boundaries
External appearance (colors, materials)

Mandatory verification before any project.

Protected and Listed Sectors

Many sectors are protected on French Riviera:

Historic centers (Old Nice, Suquet in Cannes)
Historic monuments
Surroundings of listed monuments (500m radius)

Constraints: Mandatory ABF validation, respect for existing architecture.

Environmental Standards

RE2020 (for new extensions >20m²):

High energy performance
Limited carbon footprint
Summer comfort

Mandatory EPC:

Minimum class E for rental from 2025
Minimum class D from 2028

Co-ownership

If villa in horizontal co-ownership:

General assembly authorization required
Compliance with co-ownership rules
Works on common areas

Pitfalls to Avoid

1. Underestimating Budget

Common error: Budgeting only visible works.

Solution: Systematically plan 15 to 20% margin for contingencies:

Discoveries during construction (infiltration, weakened structures)
Desired modifications during works
Material price increases

2. Neglecting Preliminary Studies

Error: Launching works without thorough assessment.

Solution: Invest in complete technical studies (€2,000 to €5,000), avoids costly surprises.

3. Choosing Based on Price Alone

Error: Selecting cheapest quote without quality verification.

Solution: Analyze globally (references, insurance, timelines, proposed quality).

4. No Project Management

Error: Self-managing coordination of 10-15 different trades.

Solution: Use architect or project manager. Their fees (10-15%) are recovered through:

Project optimization
Company negotiation
Efficient coordination
Timeline and budget compliance
Works reception

5. Ignoring Administrative Procedures

Error: Starting works before obtaining authorizations.

Solution: Patience! Building permit = 4 to 6 incompressible months. Starting without authorization = risk of work stoppage and demolition.

6. Poor Work Phasing

Error: Installing luxury kitchen before structural work completion (degradation risk).

Solution: Respect logical intervention order.

Renovation Tax Optimization

Work Deduction in Rental

If property rented:

Unfurnished rental: Works deductible from rental income (actual regime)
Furnished rental (LMNP): Property depreciation + charge deduction

Example:

Works: €500,000
Rental income: €60,000/year
Deduction spread over several years
Tax savings: up to €200,000 depending on marginal rate

Reduced VAT (10% instead of 20%)

Conditions:

Housing completed more than 2 years ago
Improvement works (not new construction)
Supply and labor by professional

Savings: 10% on labor and materials supplied by company.

Energy Renovation Aids

MaPrimeRénov' (capped):

Insulation, heating, ventilation
Limited amounts for luxury but worth checking

Energy Savings Certificates (CEE):

Premiums paid by energy suppliers
Heat pump, insulation, etc.

Post-Renovation Appreciation

Quality renovation generates significant appreciation:

Standard renovation: +15 to 25% of initial value High-end renovation: +30 to 50% of initial value Exceptional renovation: +50 to 80% or more

Example Cap d'Antibes:

Villa purchase 280m² average condition: €3,000,000
Prestige renovation works: €1,500,000
Total cost: €4,500,000
Post-renovation value: €6,000,000 to €7,000,000
Potential added value: €1,500,000 to €2,500,000

Conclusion: Investing Intelligently in Renovation

Renovating a prestige villa on the French Riviera is a major project requiring expertise, anticipation, and substantial budget. However, benefits are multiple:

Creating living space exactly to your image
Significant asset appreciation
Optimal energy performance
Enjoying exceptional location

Our agency accompanies you in your renovation project:

Selection of high-potential properties
Connection with trusted architects and craftsmen
Project follow-up if desired
Budget and tax optimization

To discuss your renovation project, contact our experts in complete confidentiality.

Article written by DAMA - Experts in prestige real estate and renovation advice on the French Riviera

2025-12-06 17:02