Grand House 115
Prefabricated single-storey house
with terrace Usable floor area: 115 m²
Grand House 115
Single-Storey Home with Terrace in Modern Barn Style
Grand House 115 is a single-storey house with a terrace, designed in a modern barn style for a family of 4–5. The layout includes a spacious living room with open-plan kitchen of 37 m², four well-proportioned rooms, two large bathrooms, a technical/utility room, and a vestibule.
Storage areas, often overlooked in other designs, have been made a priority here. The house features a spacious vestibule with a built-in wardrobe niche, a technical room for storing items and housing technical equipment, a walk-in wardrobe in the main bedroom, and numerous niches and recesses designed for additional wardrobes.
The building meets the technical standards in accordance with the WT2021 regulation. It is a year-round, energy-efficient home whose insulation parameters are very close to the passive house standard. The house meets all requirements for construction with a full building permit.
With the use of modern ventilation, heating, cooling, and renewable energy systems, the building can be constructed to meet the zero-energy standard, where the balance between energy produced and consumed equals zero.
Purpose
Our prefabricated single-storey house with a terrace is an excellent solution for a permanent residence for a family of four. The house is functionally divided into two zones: the bedroom area on one side and the living area on the other. The smart layout offers a high level of comfort while allowing residents to enjoy beautiful views through the large terrace windows.
Specifications
- Usable floor area:
- Building footprint:
- Building height:
- Ground floor height:
- External dimensions:
- 115 m²
- 142 m²
- 6,08 m
- 2,70 m
- 7,82 x 18,16 m
Functional Living Space
The house offers everything needed for year-round living: a spacious kitchen and living room, four bedrooms, a walk-in closet, two bathrooms, a vestibule, and a technical room.
The technical room has space for a washing machine and is prepared for the installation of additional equipment such as a water softener, pressure booster set, water heater, or heat pump.
The large open-plan living room with kitchen is the heart of the home — the central space for daily life and family gatherings. Its thoughtful design ensures there’s enough space for the entire family to spend quality time together. With a fireplace designed into the living room, we believe that the warmth of the home will take on a special, lasting meaning.
The non-usable attic offers additional space not included in the building’s official floor area. It provides a generous storage zone, ideal for seasonal or bulky items.
Top-Quality Materials
The facade of our house is finished with spruce cladding. The roof is covered with modular metal roofing tiles. The window joinery includes six-chamber, triple-glazed windows, installed using the warm installation method.
The main insulation of the house consists of mineral wool or, optionally, Steico Zell blown-in wood fibre. The house is additionally insulated with Steico thermal insulation boards.
Floor Plans & Interior Visualizations
See the layout of our modern barn-style home.
For more detailed architectural materials, we encourage you to get in touch directly.
Interior Finish Options
Our prefabricated timber frame house design is available in three finishing options:
Closed Shell Stage
(net + 8% VAT)
- Wall structure without installation cavity (22 cm insulation)
- Roof, floor, and internal walls without boarding
- Spruce facade
- Roofing installation
- Window joinery
Developer Stage
(net + 8% VAT)
Includes Closed Shell Stage, plus:
- Installation cavity with an additional 5 cm insulation (total 27 cm wall insulation)
- Ceiling closure and 35–40 cm ceiling insulation
- Electrical and plumbing installation
- Heating system with mobile app control
- Fermacell boards on walls, plasterboard on ceilings
- Cement screeds
- Attic ladder
Turnkey Finish
(net + 8% VAT)
Includes Developer Stage, plus:
- Wall and ceiling finishes
- Bathroom fit-out
- Floor and door installation
- Lighting installation
- Kitchen installation
Download Full Offer
Stay in touch and download the complete catalog containing all of our house designs along with detailed pricing.
Premium Standard Wall System
Discover our heavy timber prefabricated wall system
Exterior Wall with Timber Cladding [40 cm]
- Scandinavian spruce cladding, tongue and groove
- Battens and counter-battens
- Tyvek Housewrap windproof membrane
- Steico / Naturheld wood fibre insulation board
- C24 KVH finger-jointed structural timber
- Mineral wool insulation
- MFP P5 structural stiffening board
- Steico Multi Membra 5 vapour barrier membrane
- Service cavity
- Mineral wool insulation
- Fire-resistant, moisture-resistant Fermacell board
[mm]
22
38 x 58 x 2
–
60
60 x 160
160
12
–
60 x 60
50
12,5
Robust structure built using German heavy timber frame technology
We build our walls using certified KVH structural timber, finger-jointed and glued, with a cross-section of 60 x 160 mm. This timber contains 47% more raw material than standard Scandinavian beams with a 45 x 145 mm cross-section. The more massive wall structure significantly improves the building’s statics and the mechanical performance of structural joints.
Additionally, instead of standard gypsum plasterboard, we use Fermacell gypsum fibre boards as the interior wall finish. Fermacell boards are twice as dense and therefore significantly harder than standard plasterboard, which greatly improves the building’s structural performance and fire resistance. These boards are also moisture-resistant, making them suitable for wet areas.
Our German heavy frame construction system, combined with double wall stiffening using Fermacell and MFP P5 boards, ensures that our buildings meet the requirements of Poland’s highest wind and snow load zones as standard.
Vapour-open construction in accordance with building physics
The walls and roofs of our houses are additionally insulated with 6.0 cm thick Steico insulation boards. This results in a total wall insulation thickness of 27.0 cm [Uw = 0.135 W/m²K] and roof insulation of 30.0 cm [Uw = 0.126 W/m²K]. These boards significantly improve the thermal transmittance coefficient (Uw) of the building envelope and, due to their high specific heat capacity (Cw), also protect against overheating in summer. Additionally, they enhance acoustic insulation.
As a result, our homes qualify as premium in terms of both energy efficiency and soundproofing. Wood fibre boards are vapour-open materials that can be installed on the exterior side of the structure. Unlike polystyrene or OSB boards, which block moisture escape when placed on the exterior, wood fibre boards allow for proper moisture diffusion, significantly extending the life of the structure and preventing mould and mildew growth.
Installation Cavity for Electrical and Plumbing Systems
The installation battening we use on the interior side of the walls serves as a dedicated space for mounting electrical boxes, running cables in conduits, and concealing water pipes. This additional installation cavity is designed to protect the vapour barrier from being punctured.
Failing to use an installation cavity—and instead embedding installations directly into the main wall structure—leads to puncturing the vapour barrier. This allows water vapour to penetrate the structure and the main insulation layer, ultimately degrading the wall system and contributing to mould and mildew growth within the building.
The installation cavity eliminates this issue by preserving the continuity and airtightness of the vapour barrier, as all utilities are placed within the secondary battening layer. This cavity also provides an additional 5 cm layer of insulation.
Thanks to this wall system design and the high quality of materials we use, we confidently offer a 30-year warranty on the structural integrity of our homes.
Premium Standard Wall System
Discover our heavy timber prefabricated wall system
- Scandinavian spruce cladding, tongue and groove
- Battens and counter-battens
- Tyvek Housewrap windproof membrane
- Steico / Naturheld wood fibre insulation board
- C24 KVH finger-jointed structural timber
- Mineral wool insulation
- MFP P5 structural stiffening board
- Steico Multi Membra 5 vapour barrier membrane
- Service cavity
- Mineral wool insulation
- Fire-resistant, moisture-resistant Fermacell board
22
38 x 58 x 2
–
60
60 x 160
160
12
–
60 x 60
50
12,5
Exterior Wall with Timber Cladding [40 cm]
Robust structure built using German heavy timber frame technology
We build our walls using certified KVH structural timber, finger-jointed and glued, with a cross-section of 60 x 160 mm. This timber contains 47% more raw material than standard Scandinavian beams with a 45 x 145 mm cross-section. The more massive wall structure significantly improves the building’s statics and the mechanical performance of structural joints.
Additionally, instead of standard gypsum plasterboard, we use Fermacell gypsum fibre boards as the interior wall finish. Fermacell boards are twice as dense and therefore significantly harder than standard plasterboard, which greatly improves the building’s structural performance and fire resistance. These boards are also moisture-resistant, making them suitable for wet areas.
Our German heavy frame construction system, combined with double wall stiffening using Fermacell and MFP P5 boards, ensures that our buildings meet the requirements of Poland’s highest wind and snow load zones as standard.
Vapour-open construction in accordance with building physics
The walls and roofs of our houses are additionally insulated with 6.0 cm thick Steico insulation boards. This results in a total wall insulation thickness of 27.0 cm [Uw = 0.135 W/m²K] and roof insulation of 30.0 cm [Uw = 0.126 W/m²K]. These boards significantly improve the thermal transmittance coefficient (Uw) of the building envelope and, due to their high specific heat capacity (Cw), also protect against overheating in summer. Additionally, they enhance acoustic insulation.
As a result, our homes qualify as premium in terms of both energy efficiency and soundproofing. Wood fibre boards are vapour-open materials that can be installed on the exterior side of the structure. Unlike polystyrene or OSB boards, which block moisture escape when placed on the exterior, wood fibre boards allow for proper moisture diffusion, significantly extending the life of the structure and preventing mould and mildew growth.
Installation Cavity for Electrical and Plumbing Systems
The installation battening we use on the interior side of the walls serves as a dedicated space for mounting electrical boxes, running cables in conduits, and concealing water pipes. This additional installation cavity is designed to protect the vapour barrier from being punctured.
Failing to use an installation cavity—and instead embedding installations directly into the main wall structure—leads to puncturing the vapour barrier. This allows water vapour to penetrate the structure and the main insulation layer, ultimately degrading the wall system and contributing to mould and mildew growth within the building.
The installation cavity eliminates this issue by preserving the continuity and airtightness of the vapour barrier, as all utilities are placed within the secondary battening layer. This cavity also provides an additional 5 cm layer of insulation.
Thanks to this wall system design and the high quality of materials we use, we confidently offer a 30-year warranty on the structural integrity of our homes.
Completed Prefabricated Timber Frame Homes
Our Selected Energy-Efficient House Projects
Check out our other projects
Explore our range of year-round prefabricated timber frame houses.
Grand House 190
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 190 m² and a garage. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 190 m²
- 227 m²
Grand House 145
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 145 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 145 m²
- 176 m²
Prime House 110
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 110 m² including a full usable attic. Building the house requires obtaining a full building permit as a single-family residential building.
- Net floor area
- Built-up area
- 110 m²
- 79 m²
Grand House 103
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 103 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 103 m²
- 127 m²
Grand House 90
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 90 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 90 m²
- 113 m²
Rest House 88
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 88 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 88 m²
- 70 m²
Prime House 83
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 83 m² including a full usable attic with a mezzanine. Possibility to build with notification as a single-family residential house or with a full building permit.
- Net floor area
- Built-up area
- 83 m²
- 62 m²
Grand House 78
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 78 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 78 m²
- 98 m²
Rest House 66
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 66 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 66 m²
- 53 m²
Grand House 59
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 59 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 59 m²
- 77 m²
Grand House 190
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 190 m² and a garage. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 190 m²
- 227 m²
Grand House 145
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 145 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 145 m²
- 176 m²
Prime House 110
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 110 m² including a full usable attic. Building the house requires obtaining a full building permit as a single-family residential building.
- Net floor area
- Built-up area
- 110 m²
- 80 m²
Grand House 103
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 103 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 103 m²
- 127 m²
Grand House 90
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 90 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 90 m²
- 113 m²
Rest House 88
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 88 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 88 m²
- 70 m²
Prime House 83
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 83 m² including a full usable attic with a mezzanine. Possibility to build with notification as a single-family residential house or with a full building permit.
- Net floor area
- Built-up area
- 83 m²
- 62 m²
Grand House 78
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 78 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 78 m²
- 98 m²
Rest House 66
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 66 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 66 m²
- 53 m²
Grand House 59
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 59 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 59 m²
- 77 m²
Grand House 190
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 190 m² and a garage. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 190 m²
- 227 m²
Grand House 145
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 145 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 145 m²
- 176 m²
Prime House 110
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 110 m² including a full usable attic. Building the house requires obtaining a full building permit as a single-family residential building.
- Net floor area
- Built-up area
- 110 m²
- 80 m²
Grand House 103
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 103 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 103 m²
- 127 m²
Grand House 90
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 90 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 90 m²
- 113 m²
Rest House 88
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 88 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 88 m²
- 70 m²
Prime House 83
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 83 m² including a full usable attic with a mezzanine. Possibility to build with notification as a single-family residential house or with a full building permit.
- Net floor area
- Built-up area
- 83 m²
- 62 m²
Grand House 78
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 78 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 78 m²
- 98 m²
Rest House 66
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 66 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 66 m²
- 53 m²
Grand House 59 SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 59 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 59 m²
- 77 m²
Grand House 190
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 190 m² and a garage. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 190 m²
- 227 m²
Grand House 145
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 145 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 145 m²
- 176 m²
Prime House 110
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 110 m² including a full usable attic. Building the house requires obtaining a full building permit as a single-family residential building.
- Net floor area
- Built-up area
- 110 m²
- 80 m²
Grand House 103
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 103 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 103 m²
- 127 m²
Grand House 90
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 90 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 90 m²
- 113 m²
Rest House 88
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 88 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 88 m²
- 70 m²
Prime House 83
HOUSE WITH USABLE ATTIC
Year-round prefabricated timber frame house with a usable area of 83 m² including a full usable attic with a mezzanine. Possibility to build with notification as a single-family residential house or with a full building permit.
- Net floor area
- Built-up area
- 83 m²
- 62 m²
Grand House 78
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 78 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 78 m²
- 98 m²
Rest House 66
HOUSE WITH MEZZANINE
Year-round prefabricated timber frame house with a usable area of 66 m² featuring a spacious mezzanine. Possibility to build with notification as an individual recreational building (IRB), with notification as a residential house, or with a full building permit.
- Net floor area
- Built-up area
- 66 m²
- 53 m²
Grand House 59
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 59 m² and an unused attic. Building the house requires obtaining a full building permit based on an architectural and construction design.
- Usable area
- Built-up area
- 59 m²
- 77 m²
