One contract, one point of contact
Masonry, roofing, electrics, plumbing: every trade works to its own spec and deadline, but a single point of contact answers for the result.
In Seraing, trades are ordered so overhead work is completed, checked, and cleared before the finish below is installed and handed over.
Real site · trades coordinated on one schedule
A general contractor's quote rarely fits on one line. Three choices are enough here for a ballpark figure, without leaving your number.
Estimated budget — excl. VAT
· · · tear off and send us this estimate · · ·
Refine with 3 photosIndicative Belgian market ranges for 2026 — this is not our price list. Your exact price is confirmed in writing after the free site visit, and it doesn't change after that. The 6% rate applies to homes occupied for more than 10 years, used mainly as a private residence, with materials invoiced by the contractor.
Plans, permits, the residents' association, insurance: the admin side is part of the contract, not another job for you between site visits.
At handover in Seraing, the completed work is checked against the agreed scope before the final areas are released. Working backwards, the sequence is set so finishing follows the trades above it, with each transition recorded for the household. Alpha Services Benelux visits the home, identifies the work required, and prepares a full written quote before anything is opened. Any finding uncovered later is priced in a written addendum for the client’s approval.
Masonry, roofing, electrics, plumbing: every trade works to its own spec and deadline, but a single point of contact answers for the result.
We prepare the planning application, liaise with your architect or structural engineer, and track the approval timeline with your local authority.
Meeting requests, works approval, access to shared areas: we prepare the paperwork your syndic or residents' association expects before site starts.
A site manager sequences the trades, signs off each stage before the next begins, and absorbs delays instead of passing them on to you.
A firm line-by-line price before works start, a 10-year structural guarantee on load-bearing work, and a certificate handed over before the first day on site.
A joint inspection of the finish, a dated snag list, and follow-up until every item is closed — the site is not finished until you have signed it off.
The site manager who signs your quote is the same one who signs off the handover. No handing the project to a different team halfway through.
A call or three photos over WhatsApp are enough to tell you whether your project — new build, extension or major renovation — fits what we do.
0485 44 55 12A site manager visits Seraing, assesses the existing structure, works out which trades are needed and which permits to sort out first.
Within 24–48 h on working days · freeA firm price per line item, a schedule broken down by trade and the payment terms. This document commits us as much as it commits you.
The price is locked in hereWeekly photo reports, trades coordinated on site, then a joint inspection of the finish and follow-up on the snag list.
10-year structural guaranteeThe usual complaint about a multi-trade site: nobody owns the problem once it falls between two crews. Here is what we take off your hands.
Our own projects, not stock photos. The full video follow-along is on our TikTok.






The ranges the market charges in 2026, published as they stand. Your quote may fall below or above them — it will be calculated, not estimated.
Indicative Belgian market ranges for 2026 — not an Alpha Services price list. Amounts excl. VAT. Fixed quote confirmed before work begins.
Five provinces under one planning code (the CoDT) — but grants and deadlines that run on their own calendar, not Brussels' or Flanders'.
Before an existing installation in a Seraing home is touched, its visible condition, connections, and position are noted in the work record. The contractor then confirms what will be retained, isolated, or altered, so the agreed sequence reflects the installation rather than assumptions.
The 5 provinces we cover
The municipal council (collège communal) issues most permits, with an official timeline of 30 to 115 days depending on the procedure. Since 1 May 2025, a wider list of work is exempt: openings in a flat roof, bike shelters, covered parking for active mobility up to 60 m², HoReCa terraces up to 100 m², solar panels, heat pumps. Watch out for ground-mounted solar panels: the unlimited-surface exemption only applies in an economic activity zone — in a residential zone, a permit is still required.
Against a refusal, the applicant, the municipal council or the regional planning delegate have 30 days to appeal to the Walloon government. A third party — a neighbour, say — has no access to that administrative route and must go straight to the Council of State, within the standard 60-day period.
As of 24.07.2026, Prime Habitation is still accepting applications, final invoice included, up to and including 30 September 2026 — check energie.wallonie.be before any quote that would run past that date. An energy audit by a certified auditor is mandatory before work starts, except for roofing. Separately, the SWCS's Rénopack finances €1,000 to €60,000 at 0% interest, for a project capped at €62,500, repayable before the borrower's 86th birthday.
Nothing applies today: from 2028, anyone buying a home labelled E, F or G will have to reach at least label D within 5 years of the purchase deed, then C by 2031, B by 2036, A by 2041. Unlike Brussels, this obligation will be triggered by the purchase itself, not by a single calendar for every owner. We don't apply it to a project signed in 2026 — but we do factor it into a quote for a home that's about to change hands.
What comes up at every first meeting with a general contractor.
Describe the job in three fields. We'll come back to you with a visit slot — free, no obligation, and without six follow-up calls.
WhatsApp opens with your message already written — all you need to do is press send. If nothing opens, call us on 0485 44 55 12.
Service area: Seraing 4100, Liège