House costs 160 sqm living area + 85 sqm basement NRW, 2014

I would like to break down the total, rounded house construction costs for my building project in NRW from the year 2014, as a comparison for future builders (with the corresponding surcharge for the coming years).
It concerns 160 sqm of living space on the ground floor and attic (1.2m knee wall), an unfinished attic under a clipped gable roof (but insulated because that is where the controlled residential ventilation system is located), additionally 85 sqm of (still) usable basement (which is/will be "finished" over time by me, screed, plaster, electrical work etc. was done as well), built as a "white tub" watertight against groundwater and thermally insulated. Otherwise, it is a solid house made of aerated concrete blocks, mineral wool insulation, and cladding (gray "with texture"), certified KfW 70, but data-wise rather KfW 50 (only financially the effort for an expert is not worthwhile compared to the KfW bonus). Stairs made of reinforced concrete. Heating is a geothermal heat pump with 2x75m drilling (slightly more than calculated at my own request) and controlled residential ventilation. Overall equipment rather above standard (e.g., many sockets, network/satellite outlets in almost every room), but nothing really special.
Ancillary and construction costs total: 50k
Surveying costs total €2,600
City fees €1,000
House connections €6,000
Costs for construction planning, management, execution, supervision €39,500
Soil survey €1,000
Craftsmen costs house total: 257k
Earthworks and drainage €15,000
Foundation for garage incl. earthworks and concrete columns €3,500
Masonry/shell construction work incl. cladding €104,000
Interior plaster €6,500
Roofers and carpentry work €20,100
Stair railing €3,800
Windows and front door €12,800
Own contribution: all electric roller shutters incl. timer etc. €900
Electrical work incl. network cables and satellite system €11,000
Sanitary & heating incl. controlled residential ventilation and geothermal probe €47,500
Drywall €9,000
Interior doors with rounded corners and protective coating €3,500
Blower door test incl. consultation €250
Screed €4,000
Tiler for bathroom, hallway, stairs, dining kitchen and study €14,600
“Own contribution” total: 28k
Kitchen (electrical appliances purchased separately as significantly cheaper) €14,000
Laminate €1,500
Paints and wallpaper (all walls and ceilings wallpapered and painted) €1,500
Tools/small parts throughout the entire construction project €1,000
Missing interior furnishings such as washbasin cabinets, living area furniture, mirrors, some shelves, lamps €10,000
“Outdoor area” total: 28k
Finished garage 9x3 with window and door at the back €8,000
Garage motorization electric €300
Fence €600
Hedge €450
Other garden plants €500
Garden tools €700
Stainless steel grating €400
Garden/landscaping: paving of parking spaces, terrace, terrain work €16,500

Thank you for such a breakdown.

You could have at least added it up ...

Just to be sure... these are already gross prices, right?

It is deliberately not totaled, and yes, everything is gross, i.e., including 19% VAT.

Were all the prices from craft businesses or are there also prices that are "under the table"? Feel free to send a private message if you don't want to write it here. I am currently planning as well, expecting about the same costs. The 900 euros for blinds, is that with blinds included or just for the electric drives? I'm still unsure about the blinds, I had expected significantly more, I have 15 windows that I need to equip.

Everything on invoice, if only because of the warranty. However, the tender for the craftsmen was in a wide radius, e.g. the tiler "lives" so far away that they stayed overnight nearby and worked for hours, so the travel distance does not play such a big role. The €900 are for 10 motors and switches with timers/sun sensors. The rest was brought by the carpenter/window maker.