Compare experience, assignment size and working method.
Discuss similar work
Ask how the contractor prepares the type of intervention, consults with the structural engineer and records changes. Make sure the offer is based on the same drawings as those provided to other suppliers.
Make implementation and price concrete
Record what preparation, materials, assembly and finishing are included. Also appoint the contact person, planning and handling of additional work. The quote comparator helps to make differences visible.
Assess the approach for your type of renovation
Ask how the contractor collects information, coordinates implementation questions and works with constructive documents. Discuss who manages subcontractors and suppliers and how temporary facilities are prepared. Reference projects are especially useful when the nature and circumstances are similar. Ask for a specific explanation of the work performed and the role of the party, so that you know what the reference actually shows.
Compare clear agreements next to the price
Lay the work description, exclusions, planning and handling of changes side by side. Check whether material choices, protection and finishing are sufficiently detailed to compare offers. Identify uncertain items and ask when additional costs will be discussed. A permanent contact person and recognizable document agreements help during implementation. Include essential commitments in the agreement and associated documents.
Your preparation in four steps
- Experience with similar procedures
- The same document set for all quotations
- Clear work and material specifications
- Agreements about changes and planning
Frequently asked questions on this topic
Can I tell from the thickness whether my wall is load-bearing?
Wall thickness is at most an indication. The load-bearing direction of floors, upper building components, previous renovations and the actual support must be considered together. Collect drawings from multiple floors and determine what additional information is needed. Do not start removal based on a knock test or a comparison with another home.
Is the foundation also examined for a load-bearing wall?
That depends on the agreed assignment and the consequences of the breakthrough. A beam can concentrate forces on smaller support points. The underlying construction and foundation may therefore be relevant. Ask explicitly which supports, columns and existing parts are included, so that it is clear where the assessment ends.
View the associated structural calculation, create your preparation list or take the guides and checklists along to the consultation.