Advice before the choice
We listen to your home, wishes and timing before suggesting products.
More space, one point of contact
Extension and total renovation
From openings and exterior carpentry to a finished extension that logically fits in with your home.
Well-thought-out customization
A solution that is right for your home.
Cose combines experience in windows and doors with extensions, extensions and total renovation. We supervise the process from construction and outer shell to a finished extra living space that connects to the existing home.
Possible applications include a larger living space, extra bedroom, pool house or new living wing. Materials, insulation, roofing, foundation and finishing level together determine the approach, timing and price.
Coherence between shell construction and exterior carpentry
Clear phasing and agreements
Attention to insulation and connection details
Extension and total renovation
Renew roof construction
In the case of an outdated or damaged roof structure, existing parts can be removed, load-bearing elements reinforced and new insulation and waterproofing installed. Gyproc and gyplat provide a sleek, durable finish indoors.
- Checking and strengthening of supporting structures
- High-quality insulation and waterproofing
- Interior finishing as a fully-fledged living space
Extension and total renovation
Total renovation and additional living space
During a total renovation, we look at the expansion and existing structure together. Possible works include concrete formwork, adjustments to the roof structure, gutters and Resitrix EPDM, Velux skylights and reconstruction in a timber frame or traditional techniques.
Timber frame is suitable for a lighter, partly prefabricated extension and can limit the implementation time.
- Shell and outer shell are coordinated
- Traditional or timber frame construction
- Windows, doors and roof details are planned in an integrated manner
Extension and total renovation
Permit, architect and budget
The cost price depends on surface area, material, construction method, foundation, insulation, techniques and finish. Depending on dimensions, height and location, a notification, environmental permit or architect may be required.
Check the urban development regulations in time. Cose discusses the technical possibilities and helps identify the right external steps.
- Clear scope and material choices
- Attention to urban development rules
- Guidance from first idea to delivery
Craftsmanship and aftercare
More than 15 years of experience
Cose supervises new construction and renovation projects from advice and measurements to installation and finishing. Even after delivery, we remain available for questions and aftercare.
Clear answers
Frequently asked questions about extensions and total renovation.
Your project may have different technical requirements. During the measurement you will receive advice for your specific situation.
Does Cose do the complete extension?
The precise scope is determined per project. Please contact us so that we can assess which works we include ourselves or with partners.
Can an extension be planned at the same time as new windows?
Yes. Integrated planning prevents duplication of work and makes connection details more manageable.
Do I need a permit for an extension?
A notification or environmental permit is often required, but the rules differ per region, municipality and project. Check this before design and implementation.
What is the difference between an extension and an extension?
Both terms are generally used for an extension of the existing home. In practice, this concerns additional living space that is structurally connected to the existing home.
Does the foundation need to be adjusted?
An extension usually requires a new, calculated foundation. Soil, weight, construction method and connection to the home determine the implementation.