Turnkey general contracting

Turnkey general contracting

Grandbau-ker offers a full-scale turnkey construction service for the construction of detached houses, residential buildings and homes tailored to individual requirements.

Throughout the construction process, we do not adopt a one-size-fits-all approach: we tailor every project to the client’s vision, lifestyle, technical requirements and the specific characteristics of the property in question.

Our aim is to ensure that the construction process is transparent, organised and predictable from start to finish, right through to handover. We coordinate the work processes with our own professional team – who have worked together for many years – and our trusted partners, so the client does not have to worry about dealing with individual tradespeople, scheduling or sourcing materials.

We undertake the organisation of construction works, the coordination of specialist trades, the management of material procurement and delivery, and the coordination of the entire construction process. Whether it’s the construction of a new family home or a large-scale renovation, Grandbau-ker’s aim is to ensure that the finished home is not only technically sound, but also a comfortable living space that is truly tailored to the client’s needs and will be cherished for years to come.

For us, turnkey construction does not mean confining the client to a pre-determined framework. Quite the opposite: we work whilst taking into account individual ideas, functional requirements and personal preferences, so that the end result is truly your home.

Grandbau-ker – turnkey construction tailored to your individual needs, with a turnkey handover.

Turnkey general contracting

Turnkey general contracting

Turnkey general contracting

Turnkey general contracting

Turnkey general contracting

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Frequently Asked Questions

This is a common misconception. Far from having a shorter lifespan, modern, properly maintained wooden doors and windows often last longer than their plastic counterparts. The combination of high-quality timber, modern surface treatment technologies and precision manufacturing ensures that wooden windows and doors retain their structural stability and aesthetic value for many decades.
👉 It is no coincidence that many historic buildings still feature their original wooden windows today – even after 60–80 years.

A professionally manufactured and fitted wooden door or window has an average lifespan of 40–60 years, but with proper maintenance, this can be even longer. The lifespan is primarily influenced by the following factors:
- the quality of the timber used
- the surface treatment
- the quality of the installation
- regular, yet simple, maintenance
This offers a solution that retains its value better in the long term than most plastic alternatives.

Modern wooden doors and windows do not require complicated or frequent maintenance. Generally speaking:
- occasional cleaning
- surface inspection every few years
- surface refreshment where necessary
This does not involve annual painting or major work, just a little careful attention – in return, the natural beauty and durability of the wood are preserved.

Wood is a natural thermal insulator, making it ideal for the manufacture of energy-efficient windows and doors.
Modern wooden windows and doors:
- offer excellent thermal insulation performance
- provide effective sound insulation
- reduce heating and cooling costs
With the right glazing and precise installation, they create a comfortable, quiet interior space.

The initial investment cost of wooden windows and doors is generally higher than that of plastic ones, but this is offset in the long term by:
- a longer service life
- greater ease of repair
- higher aesthetic and property value
- a natural, timeless appearance
Wooden windows and doors are not mass-produced items, but a durable solution that adds value.

Yes, we manufacture wooden doors and windows entirely to bespoke sizes and specifications, ensuring they fit perfectly with the style and technical requirements of the property in question. Whether it’s a unique shape, an unusual size or a specific design, production is always bespoke.
During the bespoke manufacturing process, you can choose from a wide range of colours and designs, ensuring that your wooden windows and doors blend harmoniously with your home, not only in terms of function but also in appearance. From design through to production and right up to installation, everything is handled under one roof to ensure a precise and durable end result.

Wooden doors and windows are made to order, so the production time is typically 4–5 weeks, depending on the following:
- dimensions
- the type of timber selected
- surface finish
- type of glazing
The exact delivery date is always agreed in advance, ensuring that planning can be carried out with certainty.

The warranty covers not only the product but also the installation, provided that both the manufacture and the installation are carried out by the same company.
This means that:
- there is no passing the buck
- there is a single point of contact
- a single party is responsible for the entire process
This provides customers with peace of mind and security in the long term.

Yes, this is one of the biggest advantages of having both manufacturing and installation carried out by a single provider:
- there are no misunderstandings regarding dimensions
- there is no chain of contractors
- responsibility is clear
- installation is faster and more accurate
This solution means safety, predictability, and a faster and better end result for the client.

Széchenyi Terv Plusz