ᐅ Floor Plan for a Multi-Generational Home Conversion of an Old Barn

Created on: 9 Feb 2021 21:56
D
derclaus
Hello dear forum members,

I have been quietly following the discussions for some time now and am curious to share the first drafts of our house construction project—to see what feedback I get. I can hardly imagine that anyone outside of this project can really understand it, but I will do my best to make the introduction as clear and informative as possible.

Background:

About two years ago, my family (wife, three children aged 7, 5, and 3), my sister-in-law, and my parents-in-law moved to an estate near Oldenburg. The estate measures about 3.5 hectares (including 2 hectares (5 acres) of pasture for my sister-in-law’s horses). Over the past few years, we have been almost daily occupied with restoring the estate and maintaining the surrounding land and large areas.

Current Status GROUND FLOOR

Together with a friend (a carpenter and exhibition builder), I started planning the conversion of the barn belonging to the estate to create an apartment for my family. However, most of the work comes from me; my friend only gave me some initial support and is not further involved in the project. The usable footprint is predetermined because part of the barn must remain storage space for equipment, etc. We have already made several drafts, and I would like to share what I consider the best ones here. Overall, we are quite satisfied with the ground floor approach, but the lighting situation is particularly challenging since windows can only be placed on one side—as only the south side of the barn can be converted. The plan is to include a living-dining-kitchen area with a fireplace, staircase, utility room, master bedroom with walk-in closet, and a full bathroom preferably with a bathtub.

An important note: two pillars (30x30cm (12x12 inches)) run from the floor all the way to the roof. These cannot be altered for structural reasons and also affect the layout of the upper floor, including room arrangements and staircase positioning. We have fixed the south side width at 14–15 meters (46–49 feet), with a maximum of 16 meters (52 feet) possible, but no more.

Current Status UPPER FLOOR

So far, I have only worked roughly on this level since I am still not satisfied with the ground floor layout. I have attached a rough draft for the three children’s rooms and the bathroom.

It is important to note: at this level, there are additional supports branching off from the mentioned pillars, running diagonally from the floor to the ceiling toward the north, which cannot be removed either. In my opinion, these should be incorporated into the walls. A door could be installed at the outer edge of such a wall. But we have not reached that point yet...

Information about the FLOOR PLAN PLANNING:
As far as I can judge, not all details (such as floor area ratio, gross floor area ratio, etc.) are relevant for this existing building construction. I will provide these as far as possible and will do my best to answer questions from the community.

From my side GENERAL COMMENTS:
I welcome any and all constructive feedback and will not be disappointed if it challenges my views on how everything should look. At this stage, any aspect or wall can still be changed. I’m looking forward to it.

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Development Plan / Restrictions
Size of the property: 3.5 hectares (8.6 acres, including 2 hectares (5 acres) of pasture)
Slope: none
Number of floors: 2
Roof type: gable roof with 50-degree pitch, barn approx. 12 meters (39 feet) high
Style: estate style
Orientation: conversion on the south side
Maximum height / limits: unknown
Other requirements: According to the building authority, the drafts can be realized without problems.

Client Requirements
Style, roof type, building type: single-family home on an estate (conversion of existing building)
Floors: ground floor + upper floor (2 full floors) + option to convert the attic
Number of people, ages: 5 people: 46, 37, 7, 5, 3
Space requirements ground floor, upper floor: 200 square meters (2150 square feet) +
Office usage, home office?: office currently not planned, if possible with a single workspace
Guests per year: 10
Open or closed architecture: open, but living & dining area should not be too open
Conservative or modern construction: rather modern
Open kitchen, kitchen island: open kitchen, kitchen island
Number of dining seats: at least 6
Fireplace: yes, in the living-dining room, preferably on an exterior wall
Music / stereo wall: no
Balcony, roof terrace: no, only a terrace facing the garden—preferably with a terrace door
Garage, carport: no, parking spaces available
Vegetable garden, greenhouse: no
Preferred heating technology: connected to the main house’s heating, so not relevant

House design
Designer: own design
What do you particularly like? Why?:
- We really like the ground floor with its large south-facing windows; it’s necessary to bring light into the barn’s interior and the far corners of the living room
- The access to the parents’ area is not directly from the hallway. Even though it costs space, I like it this way.

What do you dislike? Why?:
- I am very undecided about how to fit a bathroom on the ground floor.
- The big question is whether the living room should extend to the rear wall. I think there's still light there, but I don’t quite know how to best use the space. Or should a staircase be placed behind it?
- The access to the living room is unclear to me. On one hand, we prefer it to be closed off; on the other, keeping the option to open it up sounds interesting—possibly with a sliding door.
- We like seeing the staircase from the entrance (rather than hiding it in a dark corner).

If you had to give up on some details or features,
-Could you give up on: bathtub in the bathroom next to the parents’ bedroom; a shower is sufficient
-Cannot give up: office (could also be located in the attic; currently, there are alternatives in the main house)

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ESTATE – the photo shows the barn, overall dimensions 30 meters (98 feet) long, 20 meters (66 feet) wide – so only the southwest side can be converted.



Interior of a barn: timber beam roof structure, staircase, tools, building materials, and equipment.

Exterior view of a red brick house with terrace, garden furniture, plants, and clothesline.


PRELIMINARY DESIGNS – OPEN CONCEPT Drafts 21A + 21B

Floor plan of a house: open living/dining area, kitchen, bathroom, bedroom, stairs, void space.

Floor plan of a house: open living with kitchen and dining table, living room, hallway, bathroom, bedroom, stairs.


Red brick roof over a red brick building with garden


Floor plan of an apartment: open living area, dining area, hallway, bedroom, bathroom.


Floor plan: open living/kitchen area with dining space, stairs, bedroom, bathroom, and outdoor area.
I
icandoit
10 Feb 2021 16:16
That’s what I meant. Keep the existing window. I would approach the south side much more boldly. The large planned windows don’t harmonize with the low eaves. But I’m not an architect. I imagine a fictional two-story flat-roof extension that serves as a kind of bay window. I don’t know what to call it.
derclaus10 Feb 2021 16:17
South schrieb:

Is the main entrance door going on the south side as well? Are you replacing the foundation slab?
We considered that necessary in our case. The existing slab was directly on marshy ground, with no protection against groundwater and no reinforcement. Also, part of it was an old stable, so the foundation slab needed to be renewed anyway. I'm asking because the floor level might change depending on how much soil you can excavate. Our structural engineer and architect set a maximum depth for us. In our case, with a former height of 2.3 meters (7.5 feet), it’s really tight (though we have underfloor heating) with the front door, but it just about works 😉

Regarding the budget, I would not initially worry too much. We are working with a significantly smaller budget, but as I said, we only renovated the upper floor and the roof is in good condition. So far, no nasty surprises. But I’m not an expert, and just the roof alone will definitely cost a lot of timber.

To comment on the floor plan, I have a few questions. What will the rooms without windows be used for? How will they be ventilated? I’m thinking especially about a washing machine, dryer, hanging laundry, etc., which all create moisture. Will there be a kids’ bathroom upstairs, or will the three children share your bathroom?
Do you really have no option to use the gable side or the south side?

By the way, who said the roof has to be completely replaced? Has a building surveyor, architect, or structural engineer been involved? We developed a rough plan with the latter for our renovation and now only call on them when needed. For example, our mason wanted to install the interior insulation using standard aerated concrete blocks with an air gap, which wouldn’t have been ideal. Maybe it would have worked, but we could have soon faced moisture damage. Our architect put a stop to that. Especially as non-experts with good support from many family tradespeople, we’re grateful to have the opinions of the architect and structural engineer. I always compare those with the views of the contractors involved. If there are differences in opinions about the execution, then these can be worked out. The final decision still has to be ours.


Thank you very much for sharing your experience and positive vibes. I take all of it on board, and our situation will be similar regarding the height of the south side.
The rooms without windows are primarily intended for storage and as a transition to the stable. Washing, etc., will be done in the main house.
There will be a children’s bathroom upstairs, and unfortunately, we can only use the south side. The gable side to the west is occupied by the main house, and the one to the east is too far away.
derclaus10 Feb 2021 16:42
icandoit schrieb:

So, the bottom edge of the gutter. It’s probably less than 2 m (6 ft 7 in) from the planned finished floor level. Remove the old floor and you’ll immediately gain about 20 cm (8 inches).

Ok, got it. Thanks.
derclaus10 Feb 2021 16:44
icandoit schrieb:

I imagine a fictional two-story flat roof extension that functions like a kind of bay window. I'm not sure what to call it.

Oh. Interesting. I’ll keep that in mind and understand the point.
11ant10 Feb 2021 16:55
icandoit schrieb:

I am picturing a fictional two-story flat-roof extension that serves as a kind of bay window. I don’t know what to call it.
A bay window would probably just be called a bay window, but I’m not entirely sure what you mean.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
I
icandoit
10 Feb 2021 17:05
For example: 10 m (33 feet) wide, 1-2 m (3-7 feet) deep, 6 m (20 feet) high. Leave the brick wall standing 3 m (10 feet) on the west side and the remainder on the east side.

Or start the extension at the first small window on the west and end at the third window.