Having a roof extension designed and engineered.
With a roof extension, you add extra living space on top of your existing home. This can be a complete additional floor, or a partial extension to create a bedroom, bathroom, home office, or extra living area.
A roof extension is a major renovation. The existing house, foundation, floors, walls, and overall stability must be capable of handling the extra load. Constructieplan.nl creates the architectural drawings, structural calculations, structural drawings, working drawings, and permit documents required for a safe and permit-ready roof extension.
Why choose a roof extension?
A roof extension is ideal if you need more space but do not want to move. You make better use of the existing home and create extra living area in the spot where space is often still available: right on top of the house.
Because weight is added to the existing structure, a careful investigation must be conducted beforehand to determine if the house can support it. The foundation, load-bearing walls, floors, and overall stability play a crucial role in this assessment.
A roof extension almost always requires a customized approach. With proper technical engineering, you prevent any issues from arising during construction regarding load-bearing capacity, dimensioning, connections, or permit requirements.
What do you need?
For a roof extension, you typically need:
- Architectural drawings of the existing and new situation
- Floor plans, facade elevations, and cross-sections
- Structural calculations for the foundation, floors, walls, roof, and overall stability
- Structural drawings of steel, timber, concrete, or other load-bearing components
- Architectural details and working drawings
- A building permit application through the official online permit portal (Omgevingsloket)
- Additional calculations or reports, if applicable
In most cases, a roof extension requires a building permit. The municipality assesses not only the architectural engineering but also the appearance, height, impact on the surroundings, and structural safety.
What are the costs?
A roof extension is typically more complex than an extension, dormer, or wall breakthrough. As a result, the costs for drafting, structural calculations, and permit application management are generally higher.
The price depends on the size of the extension, the existing structure, the required reinforcements, the design, and municipal requirements. Roughly speaking, you should take into account costs for architectural drawings, structural calculations, structural drawings, working drawings, and permit application management.
Curious about the costs for your roof extension? Click the ‘Request a no-obligation quote’ button and receive a quote based on your plans.
Our approach
01.
Precision
Every project is carefully developed by our specialists. We work with precision and thoroughness to ensure that your project meets all standards and requirements.
02.
Reliability
You can count on us. We always deliver within the agreed timeframe and guarantee a result that meets all municipal approval standards.
03.
Personal approach
Every project is unique. We take the time to fully understand your situation and proactively contribute ideas. From the initial consultation to final delivery, you are never on your own.
Not sure where to start? Request a free consultation!
We are happy to think along with you regarding your construction project. Together, we will review your plans and provide immediate clarity on the best possible next steps.
During the consultation, we will discuss:
The possibilities for your project
The best approach for your specific situation
How to avoid mistakes and unnecessary costs
The next steps, from permits to design
