ᐅ Finished basement home office additional cost

Hello,

We received an offer from the builder for additional costs to increase the basement ceiling height and to add a home office including underfloor heating and a daylight window for about 16 m² (170 sq ft) at over 8,000€.

Is this extra charge reasonable?

What should be considered when planning such an extension?

It is a semi-detached house with underfloor heating and an air-source heat pump.

Thank you in advance!

Do the math!

How many extra bricks are there?

What can you argue against that? My gut feeling is that it’s not an exaggeration – but I would either fully heat a basement or not heat it at all.

Hello,

it is a 6m x 10.5m (20ft x 34ft) semi-detached house...
in the basement, an office space of approximately 18-20 sqm (190-215 sq ft) is to be heated, the rest will be a small storage room and a technical/laundry room.
I thought that heating the storage room and technical/laundry room would not be necessary.
What disadvantages or problems (can) arise from having only a partially heated basement?

Thank you very much for your help!

Hello,

Momad schrieb:

We received an offer from the developer for additional costs related to increasing the basement ceiling height and finishing it with a home office including underfloor heating and a daylight window, approximately 16 m² (172 ft²), for over 8,000€.

It is a 6 m x 10.5 m (20 ft x 34 ft) semi-detached house...
The basement is intended to have a heated office space of about 18-20 m² (194-215 ft²), with the rest being a small storage room and a utility/laundry room.
I thought heating for the storage room and utility/laundry room would not be necessary.

Is the additional cost reasonable?

The price does not seem too high to me; if anything, it seems rather low. The entire basement ceiling height is being increased to an internal height of 2.50 m (8 ft 2 in), screed and underfloor heating are being installed, and most likely the electrical wiring in the office will be installed concealed in the walls; plus a living space window. I would also recommend having a ventilation system installed in the office.

Keep in mind in your calculations that you will need to transport more excavated soil; I assume the basement walls will not be underpinned to accommodate the increased floor-to-ceiling height.

Regards, Bauexperte

Ventilation is quite important, I think. Especially when you warm the air and it then moves through open doors into colder rooms.
Furthermore, I would make sure that the calculated heating system still meets the requirements (although these are usually oversized anyway).