Grand House 90
Prefabricated single-story house
with a usable area of 90 m²
Grand House 90
Prefabricated Single-Storey House with Terrace
Grand House 90 is a single-storey house in the modern barn style, designed for a family of three. The interior includes a spacious 37 m² living room with kitchen annex, two well-proportioned bedrooms, a bathroom, a separate WC, a utility room, and a vestibule.
Storage areas — often overlooked in architectural designs — were given high priority. The house features a spacious vestibule with a built-in wardrobe recess, a utility room for storage and technical equipment, a walk-in closet in the master bedroom, and numerous recesses and alcoves intended for additional wardrobes.
The building complies with the technical standards set by WT2021. It is a year-round, energy-efficient home with insulation parameters very close to passive house standards. The house meets all requirements for construction with a full building permit.
With modern solutions in ventilation, heating, cooling, and renewable energy systems, the house can be built to net-zero energy standard, where the annual energy balance equals zero.
Purpose
Our prefabricated single-storey house under 100 m² is an excellent choice as a permanent home for a family of three. The layout separates the bedroom zone on one side of the house from the living zone on the other. The functional room arrangement ensures comfortable living while also allowing residents to enjoy beautiful views through large terrace windows.
Specifications
- Usable floor area:
- Building footprint:
- Building height:
- Ground floor height:
- External dimensions:
- 90 m²
- 113 m²
- 6,08 m
- 2,70 m
- 7,82 x 14,41 m
Functional Living Space
The house offers everything needed for permanent living: a spacious kitchen with living room, two bedrooms, a bathroom, separate WC, vestibule, and a utility room.
The utility room accommodates a washing machine and is ready for the installation of larger sanitary equipment, such as a water softener, pressure system, water heater, or heat pump.
The open-plan living room with kitchen is the heart of the home — a space for everyday life and gatherings with family and friends. The well-designed layout provides enough room for everyone to enjoy time together. With a fireplace integrated into the living area, we believe the concept of the “hearth of the home” takes on even deeper meaning.
The non-usable attic offers additional storage space not included in the official floor area — ideal for bulky or seasonal 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
Grand House 115
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 115 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
- 115 m²
- 142 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
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
Grand House 115
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 115 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
- 115 m²
- 142 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
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
Grand House 115
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 115 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
- 115 m²
- 142 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
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
Grand House 115
SINGLE-STORY HOUSE
Year-round prefabricated timber frame house with a usable area of 115 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
- 115 m²
- 142 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
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
