Energy-efficient KfW55 renovation project: Architects 2FH combine modern design with 750 square meters of natural surroundings, offering extensive customization options.

+++ Data updated March 22, 2026 +++
This KfW55 duplex house, with a spacious main living unit and an attached apartment, is located in Rödermark and offers a generous 433 m² of gross floor area. The 741 m² corner plot is situated at the edge of a field and offers an unobstructed view to the west, into nature – ideal for sunny evenings. The building is currently under construction; while the structural work and dry construction are already complete, the interior finishing and exterior design offer the buyer complete creative freedom. Great emphasis has been placed on high quality; the planning and construction management were handled by a local architect and energy consultant, and local, qualified construction companies were selected for individual contracts. Building features:
- Duplex house with a main living unit and an attached apartment, each with its own separate entrance.
- KfW efficiency house standard 55.
- Year of construction: Ground floor/upper floor/roof are new constructions from 2024/2025 (1.5 stories), basement is an existing solid construction from 1982.
- Footprint: 15.71 x 10.67 m
- Gross floor area: approximately 433 m² - of which approximately 341 m² is living space (main unit approximately 290 m² / attached apartment approximately ). 51 m²) and approximately 92 m² of usable space.
- Wall construction (ground floor/first floor): Exterior: Poroton-T8 clay bricks (∅42.5 cm), perlite internal insulation, natural building envelope insulation.
- Wall construction (ground floor/first floor): Interior: Lime-sandstone blocks (KSL) (∅11.5/17.5 cm), improved sound insulation.
- Wall construction (basement): Lime-sandstone blocks (KSL) (∅37.5 cm).
- Insulation: Ground floor/first floor: Perlite internal insulation, basement: Styrofoam (∅16 cm), roof: Cellulose insulation (∅28 cm).
- Ground floor: Spacious living area (approx. 80 m²) with kitchen and a freestanding island (planned), dining area with a seating window, living room with patio doors leading to the terrace, spacious entrance area, 2 offices, and a guest bathroom, dark central staircase to the first floor, access to the basement.
- First floor: Spacious master suite with bedroom, walk-in closet, and a large master bathroom with access to the loggia, as well as 2 children's rooms with a children's bathroom.
- Basement: Service room with its own external access, apartment with its own external access - ideal as a sports room, hobby room, or sauna, utility room, heating room, basement, and a separate entrance to the service room.
- Triple-glazed floor-to-ceiling windows with increased light transmission on the ground floor and first floor, plastic, black/anthracite on the inside and outside, electric roller shutters or blinds.
- Approximately 2.80m seating window, and approximately... - 5-meter wide lift-and-slide door on the ground floor with roller blinds, providing a second access to the terrace.
- Triple-glazed, electrically operated skylights, electrically operated roller shutters.
- Electrical systems: Smart home system installed (Loxone brand) and pre-wired for lighting control (partially with dimming), window status monitoring, and wallbox preparation.
- Bathrooms: 2 on the ground floor / 1 on the ground floor / 2 on the upper floors, including a large master bathroom, designed for a freestanding bathtub.
- Underfloor heating, water-based, in the ground floor, ground floor, and attic.
- Heat pump: Viessmann Vitocal 250-A (air-water).
- Solar panel system capacity: approximately 18.48 kWp (42 x 440W modules, facing south); the solar panel system is not yet completed (registration, connection, and hot water system + storage are pending).
- Decentralized ventilation system with 8 fans (Südwind brand).
- Prepared option for a fireplace on the ground floor (connection and location).
- 5,000-liter cistern in the garden area, with drainage for rainwater.
- Garage: Existing garage (for 1 car) and building permit for a new double garage (to be constructed).
Remaining work to be completed: Interior finishing (walls, floors, ceilings, cladding), and final installation of sanitary fixtures (ceramics, bathroom/sink fittings, etc.). - Rough installation completed), electrical finishing work and connection of the meter cupboard (lighting, switches, TV/satellite system, etc. - rough installation completed), interior and exterior plastering, construction of a double garage, landscaping (gardening, access to the house, terraces, light wells for the basement, fencing, backfilling). The corner plot is located on the edge of a field, with views of the greenery (the planned terrace faces west).

Rödermark, located in the Offenbach district, offers excellent infrastructure for a high quality of life, with numerous shopping and business opportunities. It has good transport links to Frankfurt am Main and Darmstadt, both by car and public transport.

Public Transport:
- Regional/suburban train to Frankfurt am Main: approximately 30 minutes.
- Bus to Darmstadt: approximately 30 minutes.

By Car:
- To Frankfurt am Main: approximately 20-30 minutes.
- To Darmstadt: approximately 15-20 minutes.