Which structural calculation do you need?
Choose your project and discover which parts, drawings and data belong to it.
Load-bearing wall · calculationFrom €419 excl. VAT (business) · €506.99 incl. VAT (private customers)Remove load-bearing wall
Make room for an open layout. First determine how the load on the existing wall will be absorbed.
BreakthroughView this calculation →
Extension · calculationFrom €659 excl. VAT (business) · €797.39 incl. VAT (private customers)New extension
Additional living space starts with the connection to your existing home. Bring foundation, roof and breakthrough together in one plan.
ExpansionView this calculation →
Rooftop addition · calculationFrom €629 excl. VAT (business) · €761.09 incl. VAT (private customers)Additional rooftop storey
Use the space above your home. First investigate what the existing floors, walls and foundation can support.
ExpansionView this calculation →
Foundations · calculationFrom €719 excl. VAT (business) · €869.99 incl. VAT (private customers)Foundations
A substructure that matches the building and the soil. For new construction, expansion and structural adjustments.
SubstructureView this calculation →
Structural calculationPrice on requestSteel beam
From opening to support: the correct beam follows from the entire structural situation.
BreakthroughView this calculation →Structural calculationPrice on requestDormer
More daylight and space, with attention to the beams and tracks that are interrupted by the new opening.
RoofView this calculation →Structural calculationPrice on requestRoof terrace
A roof that becomes accessible takes on a different function. Have load-bearing capacity, structure and mountings assessed together.
RoofView this calculation →
Structural calculationPrice on requestSolar PV panels
Visualize the extra weight, mounting and the influence of wind on your roof.
RoofView this calculation →
Structural calculationPrice on requestStair opening
A new staircase requires a carefully designed opening in the floor.
BreakthroughView this calculation →
Indication of property · on request€3,000–€4,500 excl. VAT (business) · €3,630–€5,445 incl. VAT (private customers)House and new construction
A coherent structural design for foundation, floors, walls and roof.
New constructionView this calculation →Structural calculationPrice on requestExtension of an existing room
Expand an existing space with a well-thought-out foundation, roof construction and connection.
ExpansionView this calculation →
Structural calculationPrice on requestBalcony
An outdoor space with attention to cantilever, attachment and sustainability.
ExpansionView this calculation →Structural calculationPrice on requestBay extension
More light and space on the facade, structurally tailored to the existing home.
ExpansionView this calculation →Structural calculationPrice on requestCanopy
A suitable design for beams, columns and anchoring.
OutbuildingView this calculation →Structural calculationPrice on requestCarport
Design the free passage together with the roof, columns and substructure.
OutbuildingView this calculation →Structural calculationPrice on requestGarage
A supporting structure that suits a large door opening and the intended use.
OutbuildingView this calculation →
Structural calculationPrice on requestShed
From wooden shed to masonry outbuilding: start with the use and load.
OutbuildingView this calculation →Structural calculationPrice on requestFlat roof
Assess beams or slabs, roof structure and all planned additions in context.
RoofView this calculation →Structural calculationPrice on requestRemove chimney
Investigate what remains above and next to the chimney before parts are removed.
BreakthroughView this calculation →Structural calculationPrice on requestTimber floor joists
Investigate whether the existing or new beam layer suits the use, span and floor structure.
FloorView this calculation →
Structural calculationPrice on requestLintel
A window or door opening requires appropriate support for the load above.
BreakthroughView this calculation →Structural calculationPrice on requestSteel truss
Bring together beams, columns and connections in a design for your roof or building.
SteelView this calculation →Structural calculationPrice on requestRoof ridge raising
More usable attic space due to a modified roof, tailored to the existing home.
RoofView this calculation →Structural calculationPrice on requestFloor and floor reinforcement
Assess a floor for extra weight, an opening or a new use function.
FloorView this calculation →Structural calculationPrice on requestAdditional storey above an extension
Investigate whether the existing extension is prepared for an extra floor.
ExpansionView this calculation →Structural calculationPrice on requestSliding doors and facade opening
Structurally coordinate a larger glass opening with the existing facade and house.
BreakthroughView this calculation →Structural calculationPrice on requestMultiple interventions in one project
Coordinate an extension, breakthrough and other changes as one coherent construction plan.
CombinationView this calculation →Planning several changes to the same home?
An extension may involve a wall opening, new foundations and changes to the roof. Describe these together in your enquiry. You do not need to decide how many separate calculations are required; their relationship will be discussed for your project.
The listed amounts are starting prices for calculations. Your quote depends on the existing situation and agreed scope. Mention missing drawings or changes to an existing design so that any information needed before work can start is clear.
Which calculation fits your building plans?
Start with the change you want to make. These routes explain what helps prepare your enquiry. Combining several alterations, such as an extension and a wall opening? Describe the whole project in one enquiry so that the connections can be discussed.
- Structural calculations for a wall opening — Mark the wall you want to remove on the plans and identify the storey.
- Structural calculations for an extension — Show where the extension connects and which existing walls or openings change.
- Structural calculations for a rooftop addition — Gather available records for the whole house, including earlier alterations.
- Structural calculations for foundations — Include the design and any available structural design information; you do not need to calculate loads yourself.
- Structural calculations for a steel beam — Mark the clear opening and proposed supports on a drawing. Label provisional dimensions as provisional.
- Structural calculation dormer window — Include existing drawings and state which dimensions are known and which still need to be measured.
Cannot find your project, or unsure where to start? Browse all calculations or use the project guide to gather your plans and available documents.