Urban villa with gable roof with granny flat, residential basement, KfW 40+ and geothermal energy

Good evening!

Keywords to get started: townhouse with gable roof, KfW40+, geothermal energy with ground probe, photovoltaic at least 10 kWp + 5 kWh storage, living basement with outside stairs and laundry room + basement room for tenant, developed attic. €580,000 turnkey including basement, carport.

This year we will build a house with a tenant apartment for rent to the parents-in-law on the outskirts of Hamburg. The floor plan is a preliminary draft and was created by ourselves. We hope to get valuable ideas and suggestions from you for floor plan optimization, as we have become blind to the project. The townhouse has not yet convinced us because it seems little cozy. No roof slopes and a large attic due to the gable roof are enticing. However, we are considering setting accents through a veranda facing the street and window shutters. The interior should also be furnished in a rustic country house style.

An offer is already available, which we will accept. However, the floor plan and possibly the house type will still be refined.

We have brought you a screenshot of the development plan, infrastructure plan, house graphic, floor plan, section drawing, and a garden plan.

We are very excited about your ideas, many thanks in advance for your time!



Development plan/restrictions
Plot size: 774 sqm
Slope: No
Floor area ratio: 0.25
Floor space index: Not known
Building window, building line, and limit: See development plan screenshot
Number of parking spaces: 3 mandatory with at least 45 sqm
Number of floors: 2
Roof shape: Any, 15°–50°
Style: No restrictions
Orientation: No restrictions
Maximum heights/limits: Eaves height max. 6m, ridge height max. 9.5m


Builders’ requirements
Style, roof shape, building type: Basically not fixed; townhouse has the big advantage of no roof slopes on the upper floor and a large attic when built with gable roof instead of hip or pyramid roof.

Basement, floors: Living basement, ground floor, upper floor, and developed attic
Number of people, age: 2 adults early 30s and 1 child; we want at least 3 children.

Space requirements on ground floor, upper floor:
Main apartment min. 55 sqm living/dining/cooking + hallway + shower bath ~70 sqm, upper floor: 3 children’s rooms each at least 13 sqm + bathroom 13 sqm + corridor ~62 sqm

Tenant apartment: Min. 75 sqm, 2 bedrooms with 13 sqm and 10 sqm, living/dining/kitchen approx. 35 sqm, one bathroom at least 6 sqm and a guest WC with 2 sqm

Office: Family use or home office? Both
Guests per year: 20
Open or closed architecture: Rather closed; floor-level windows only on the upper floor facing west and northwest (because of the street in the southwest; none facing south)
Conservative or modern construction: Rustic
Open kitchen, kitchen island: Yes
Number of dining seats: 10 with extendable table
Fireplace: Yes, but later due to cost.
Music/stereo wall: No
Balcony, roof terrace: Not desired
Garage, carport: Carport
Utility garden, greenhouse: "Self-sufficiency" garden and chickens

Two terraces facing southwest and northwest.

House design
Who made the planning: Us, the builders.
What do you particularly like? Why? Tenant apartment only has access to laundry room and its own basement room via outside stairs. Many square meters were gained on small floor area through the basement and the gable roof. We like the two terraces that bring us sun in the afternoons and evenings.
What do you not like? Why? "Square, practical, good." A townhouse is not very cozy but 1.5-story design offers too little space in the attic and the slanted walls bother.
Price estimate according to architect/planner: Turnkey €580,000 according to offer including living basement, geothermal energy with ground probe, photovoltaic 10 kWp + 5 kWh storage, KfW 40+
Personal price limit for the house, including equipment: €600,000
Preferred heating technology: Geothermal heat pump with ground probe

If you have to give up, which details/extensions
- Can you do without: Kitchen island, possibly the gable roof, but rather reluctantly.
- Cannot do without: No basement is a no-go

Why is the design the way it is now?
Standard design from planner? Own design

What is the most important/basic question about the floor plan summarized in 130 characters?
We hope to get valuable ideas and suggestions from you for floor plan optimization.

Hello,

I am not an expert, but two things stand out to me.
If you need 3 parking spaces, parking spaces one behind the other are usually not allowed. You should check that.

How big is the house supposed to be? To me, it looks like about 12×10m? That could be tight with the floor area ratio. 774×0.25=193
193-45 (parking spaces)- 3×15 (small terraces)-120 (house)= -17, paths, shed, chicken coop are still missing. I would also check here to what extent an overbuilding is allowed.

Best regards

The offer seems unbeatable cheap for the building mass drawn like this!

A rough calculation would be ground floor, upper floor about 110sqm living space each plus basement just under 60sqm of living quality. That makes 280sqm at at least 2k€, currently rather towards 2.3-2.5k/sqm for standard, not KFW40+, plus basement area and the roof at least later extendable.
Heat pump with drilling is roughly 15-20k additional cost, the photovoltaic system with storage should also be in that range, additional insulation and other windows would come on top.

Is it a fixed price or an architect's estimate? Don't want to spoil any dreams but that sounds too good before walls and everything else have been shifted here.

Parking spaces in a row are sometimes accepted but not guaranteed.

There is already an offer available, which we will also accept. However, the floor plan and possibly the house type are still being refined.

We don’t yet know exactly what it will be, but just to be safe, we are signing already. :oops:

City villa with gable roof, KfW40+, geothermal energy with ground probe, photovoltaic at least 10kwp + 5kwh storage, basement with outside stairs and laundry room + cellar room for tenants, converted attic. €580,000 turnkey including basement, carport.

With the mentioned sqm, never!

Fireplace: yes, but later, because it’s expensive.

Will it be cheaper later? :cool:

I can hardly see anything on the plans. Leave out the laminate, dimension properly, and please show the levels separately.

If I add up the areas of the ground floor, upper floor, and attic, I already come to 320 sqm (with simple equipment x €2,100 / sqm = €672,000) plus basement plus KfW40+ plus photovoltaic and carport for €580,000? Good luck!

I ask, where is north? Text part of the development plan? How do you come up with the idea to design a house like this? I don't see a ridge height of 3.5 m anywhere. Start over again. Or better let someone plan who knows something about it. o_O

If I add up the areas of the ground floor, first floor, and attic, I already get 320 sqm (with basic equipment x €2,100 / sqm = €672,000) plus habitable basement plus KfW40+ plus photovoltaic and carport for €580,000?

Good luck!

That is put into perspective with one less floor. :p