Why choose Avenir Renovations?
When to call on an interior renovation specialist?
Reorganizing spaces, bringing installations up to standard, improving insulation and ventilation, harmonizing finishes... All these interventions require varied skills and precise phasing to limit nuisances and avoid rework.
Typical situations that justify a renovation
- Outdated installations: non-compliant electrical panel RGIE, aging plumbing, energy-consuming heating. An upgrade secures and reduces consumption.
- Poorly used spaces: unsuitable partitions, complicated circulation, lack of storage. A re-zoning streamlines daily life and enhances the property.
- Insufficient thermal & acoustic comfort: cold walls, impact noise. Relevant insulation solutions improve comfort in winter/summer.
- Heterogeneous aesthetics: disparate floors, damaged doors, dull paints. A complete makeover unifies and modernizes sustainably.
- The benefits of a professional approach
- Safety & compliance: adherence to standards (electricity RGIE, ventilation) and accessibility rules.
- Coordination of trades: fewer uncertainties, deadlines met, consistent finishes.
- Controlled budget: priorities by lots, priced options, no surprises.
Your interior renovation in 6 steps
A simple, transparent, and milestone-driven process.
Work & interior renovation services
We start with a technical visit and a precise measurement. You receive a detailed estimate (technical, partitions/joinery, finishes) with options to decide based on use and budget.
- Electricity – RGIE : diagnosis, bringing up to standard and compliance with RGIE (pre-inspection and approval by the authorized body), dedicated circuits (kitchen, bathroom), panel, outlets/lighting, detectors; possible secondary panel upstairs.
- Plumbing & sanitary: new or refurbished networks, silent evacuations, bathroom preparations (waterproofing, shower tray, niches).
- Heating: optimization of low temperature emitters, thermostatic valves, balancing; preparation for heat pump if relevant.
- Ventilation: extraction for bathroom/WC, VMC single or double flow depending on configuration, adjusted flows.
- Partitions Gyproc/Fermacell (fire/wet/acoustic) with suitable tracks and insulation.
- Interior doors: door frames, casings, modern hardware; aligned and regulated gaps.
- Custom storage: niches, dressing rooms, benches, integrated bookshelves.
- Floors: engineered wood, LVT/vinyl, laminate, large format tiles; acoustic underlays to limit impact noise.
- Walls & ceilings: coatings, suitable primers, professional range paints (Levis, Trimetal, Sigma, Sikkens, Mathys); non-woven, decorative wallpapers.
- Technical ceilings: integration of spotlights, LED rails, access hatches.
- Decongestion: enlargement of interior bays, glass doors (security), skylights; provision of natural light.
- Acoustic correction: peripheral joints, flexible joints, suitable glazing on doors.
- Kitchen: preparation of networks (water/electricity/ventilation), worktop, splashbacks, functional lighting.
- Bathroom: waterproofing (shower tray/walk-in), tiling, furniture, ventilation, heating suited.
How much does an interior renovation cost in Liège? (VAT included)
Prices vary based on surface area, initial condition, access, and level of finish. A detailed quote always follows a visit.
| Item | Price indication (VAT included) |
| Compliance with electrical RGIE (typical housing) | 1,500 to 4,500 € |
| Plumbing work in kitchen/bathroom (excluding sanitary) | 1,200 to 3,500 € |
| Ventilation (local extraction / VMC), depending on configuration | 600 to 3,500 € |
| Gyproc/Fermacell partitions installed, per m² | 45 to 85 €/m² |
| Interior doors + frames installed, per piece | 250 to 650 € |
| Engineered wood flooring + underlay, per m² | 45 to 110 €/m² |
| LVT/vinyl (professional installation), per m² | 35 to 85 €/m² |
| Tiling (excluding decorative tiles), per m² | 45 to 120 €/m² |
| Wall/ceiling painting (complete system), per m² | 12 to 28 €/m² |
| Multi-lot interior renovation (order of magnitude), per m² | 250 to 650 €/m² |
To consider: removals, plumb corrections, ceiling height, access constraints, occupied housing.
Materials & compatibilities: our recommendations (Belgian usage)
A durable interior relies on compatible systems from support to finish. We prioritize locally available materials, with reliable after-sales service.
- Partitions & counter-partitions: Gyproc/Fermacell (water-resistant in humid areas), compatible tapes and coatings, suitable screws.
- Paints: mat/velvet/satin finishes according to the room, primers for adhesion on smooth surfaces (Gyproc, old paints).
- Floors: glued/floating engineered wood with acoustic underlay, LVT click/glued, tiles with suitable C2 adhesive mortar, matching skirting boards.
- Joinery: hollow core/solid doors according to use, harmonized frames, modern hardware.
- Lighting: IP compliant fixtures for technical/humid areas, low-glare spots, compatible dimmers.
Common issues encountered in Liège (interior)
We address the causes, not just the appearance.
- Impact noise & reverberations : resilient underlays, partitions + insulation, perimeter joints.
- Cold walls & humidity : insulating lining, continuous vapor barrier, proper ventilation.
- Chaotic electricity : complete RGIE compliance, readable circuits, appropriate protections.
- Dusty site : phasing, protection and sorted evacuations, daily cleaning of circulation areas.
- Approximate alignments : plumb/level corrections, careful shimming, final checks at the end of the batch.
The advantages of Avenir Rénovations
Renovating the interior means achieving details that are visible every day.
- Single point of contact and itemized quotes with options.
- Method : first techniques (electrical/plumbing/ventilation), then partitions, followed by finishes.
- Clean site : protections, storage areas, maintained circulation for occupied housing.
- Measurable quality : checklists, implementation photos, final adjustments, local after-sales service.
Urban planning procedures & co-ownership (Liège / Wallonia)
Most interior works are exempt from urban planning procedures, except for changes to the exterior appearance (facade openings, frames, roof windows) or impact on the structure.
In co-ownership, technical shafts, risers, facades, and circulation areas are often common areas : authorization from property manager/AG required. We provide plans, descriptions, and, if necessary, a file for Prior Urban Planning Declaration or Urban Planning Permit.
Grants & taxation (Wallonia 2025-2026)
The Walloon Housing Grants primarily target energy, health, and safety. Interior "aesthetic" items are generally not subsidized, but :
- Energy : interior insulation of walls, ventilation, efficient heating (subject to Housing audit and income categories R1→R5).
- Health/safety : certain compliance updates (electricity, ventilation) can be included in a comprehensive audited project.
- 6% VAT : for private housing over 10 years, reduced rate possible (conditions apply).
We verify these options during the study and plan the works to optimize the aids when they are accessible.
FAQ
Can I renovate in stages to spread the budget?
Yes. We structure the quote by lots and plan a logical phasing (techniques → partitions → finishes). This limits rework and maintains the final aesthetic coherence.
Is it realistic to live on-site during the work?
Often, yes. We protect the pathways, limit dust and nuisances, organize "quiet" times when possible, and maintain access to key rooms (kitchen, bathroom) according to the schedule.
Gyproc or Fermacell: which to choose?
Gyproc covers most needs. Fermacell is interesting for acoustics, strength, and certain wet areas. We decide based on usage, budget, and constraints.
Parquet, LVT, or tiles for living spaces?
Engineered wood offers warmth and authenticity; LVT is robust and very stable, with low maintenance; tiles excel in wet areas and with underfloor heating. We compare comfort, acoustics, maintenance, and style.
Should I redo the electrical work before the finishes?
Always. The technical lots come first: it is the basis for a clean site, without chases after painting.
Need an interior renovation quote in Liège?
Benefit from a clear study, a quote by lots with readable options, and a careful execution by local teams.
Contact Avenir Rénovations Liège for a comfortable, functional, and durable interior designed for your daily life.
Agency Avenir
Rénovations
for Interior renovation work in Liège
An expert to take charge of your renovation projects and guarantee deadlines, budgets and quality of all services.
Interior renovation work in Liège and everywhere in France
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