P4 · Door-opener money page · fixed price
Wall opening. Calculated. Fixed price, documented.
When the wall is load-bearing, you need a structural engineer. We calculate, document and secure the intervention. In the Rhineland with an on-site appointment, or remotely based on your documents — within two to three weeks, with the experience of more than 70 completed building projects and 10 years in the civil-engineering profession.
Fixed-price package
Including the structural calculation and audit-ready documents — on-site appointment in the Rhineland or remotely.
Cost quick-check
What does your wall opening cost?
Three questions, an honest estimate in 30 seconds. No sign-up, no obligation.
Prefer to talk directly? +49 175 44 39 215 · WhatsApp
Is the wall load-bearing?
How wide should the opening be?
How many storeys sit above the opening?
Your estimate
Structural fixed price (incl. VAT), guide value
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Non-binding estimate — the binding fixed price is stated in your offer, usually after a photo or floor plan.
The fastest way
Prefer a callback?
No five questions, no form. Your name and number are enough — we will get back to you, usually the same working day.
Prefer right now? +49 175 44 39 215 · WhatsApp
Disziplinen unter einem Dach
Konzept · Tragwerk · Bauphysik · GEG-Nachweise · CO₂-Bilanz · Bauleitung
Partnerbüros
AKNW-Architekt · Tragwerks-, Energie- und DGNB-Partner im Netzwerk
LP 4 · Bauantrag
Genehmigungsplanung in Kooperation mit AKNW-Partner-Architekt
Erfahrung
10 Jahre Profession · 70+ Bauvorhaben · Konzept bis Bauleitung
The substance-before-design method · 5 steps
From the call to an audit-ready structural calculation.
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Enquiry & telephone pre-qualification
10 minutes on the phone. We clarify the floor-plan situation, wall type, storey and the desired opening.
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On-site appointment or documents
Rhineland: measurement, wall assessment and ceiling-bearing situation at your property (60 to 90 minutes, within 7 days). Remotely: you send plans, photos and measurements — we assess from a distance.
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Structural calculation
Sizing the lintel (HEB steel or reinforced concrete), bearing certificates to Eurocode, load-path documentation.
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Audit-ready documents
Structural file, execution drawing, parts list, masonry notes. Audit-ready format under BauO NRW.
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Handover & follow-up questions
PDF and drawing to client and masonry firm. 30 days of follow-up questions included, at no extra charge.
Anfrage · 5 Schritte
Direkt zu uns — Anfrage in 30 Sekunden.
Der schnellste Weg zu uns: fünf Fragen, eine pro Schritt. Antwort persönlich von Robin Henn binnen 24 Stunden.
When the wall comes down, nothing else does.
Eight questions we answer before every wall opening — before you commission us, in writing, and on request at the first consultation.
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01 Is the wall load-bearing?
In the Rhineland we answer this at the on-site appointment in 30 to 60 minutes — remotely from your existing plans, photos and measurements. Often beforehand if existing building plans are available. Where no plans exist, we assess wall thickness, material, ceiling bearings, construction era and structural indications. In case of doubt, an endoscope bore or a Ferroscan scan clarifies the load path. -
02 Does the work require a building permit?
For non-load-bearing walls, as a rule no. For load-bearing walls in North Rhine-Westphalia (NRW): in many cases this is exempt from procedure under § 62 BauO NRW (the NRW building code), but a structural-stability certificate (Standsicherheitsnachweis) remains mandatory. For condominiums, a resolution of the owners’ association (WEG) is required in addition. We clarify the procedural status before the calculation and name any open points transparently. -
03 What does a wall opening really cost?
Our fixed structural-engineering price is between €536 and €1,131 gross, depending on span, wall type and storey level. The masonry and steelwork are charged separately (typically €800–2,500 in the Rhineland). On request we name three vetted tradesperson contacts from the Rhein-Erft district. -
04 How quickly can it be done?
On-site appointment within 7 days of your enquiry (Rhineland); remotely we start as soon as your documents are in. Structural calculation 5 to 10 working days. For notary deadlines or urgent cases, an express track is available on request at a surcharge. -
05 Can you do this outside the Rhineland?
Yes. The structural calculation is location-independent: as long as you send us the floor plan, measurements and photos of the wall, we calculate and document nationwide — audit-ready to the Eurocodes. We offer on-site appointments within roughly 200 km of Cologne and Bonn. -
06 Can I carry out the opening myself?
For load-bearing walls we generally advise against it — fitting the steel beam requires temporary propping, exact preparation of the bearings and a verifiable construction sequence. For non-load-bearing walls, self-build is possible. In every case we supply the structural assessment and the execution notes. -
07 Which documents do I receive in the end?
You receive an audit-ready structural file (Statik-Heft) under BauO NRW — lintel design to Eurocode, bearing certificates, load-path presentation — an execution drawing with a parts list, and a note for the masonry firm. Format: PDF, plus DWG on request. -
08 Wall opening in a condominium — what should I bear in mind?
Interventions in load-bearing walls count as a structural alteration of the common property in a condominium owners’ association (§ 20 WEG). A resolution of the owners’ meeting is required. We supply the structural submission with which you prepare that resolution — including plans and risk notes.
Wall opening planned. Fixed price set from today.
Send us the floor-plan situation, the wall type and the opening you want — we will respond within 24 hours with the next step: an on-site appointment in the Rhineland, or the document checklist for a remote calculation.