Newly built single-family house, first occupancy in Impflingen

Hello everyone,

I would like to get opinions regarding the purchase of a newly built solid single-family house in 76831 Impflingen near Landau in the Palatinate. It is a first occupation of the property.
I would be very grateful for opinions, as this is my first property purchase for personal use ever.

Below are excerpts from the construction description:

- Year of construction 2024
- 185m² plot; the garden area is therefore rather limited with the terrace, but that suits us
- 115m² living space distributed over 4 rooms - 3 floors in total (so also converted attic)
- 156.4 m² usable building area
- Bosch heat pump
Central for the house air heat pump Bosch CS7001i/7400iAW IR/OR
Air/water heat pump system Compress 7001iAW, indoor unit AWBM with integrated
buffer storage and electric auxiliary heater, external hot water storage
Outdoor unit including sound insulation base
Heat distribution via underfloor heating
All living and bedrooms as well as bathrooms are individually controllable
- no basement
- Ground floor: 43.23 m², 7 rooms (guest WC, kitchen, living/dining room, utility room)
- 1st floor: 43.72 m², master bedroom + dressing room, child’s room, storage room, main bathroom
- Attic: 24.29 m² (hobby room, WC/bathroom)
- HAR (ground floor): 4.16 m²

see further under building materials etc. please

- Single garage (3x6m) with adjacent parking space and electric sectional door from Hörmann

Energy certificate: A+ (final energy demand 27.9 kWh/m²-a and primary energy demand building 50.3 kWh/m²-a) procedure according to DIN V 18599
Energy quality of the building envelope indicated as: 0.33 W (m²*K)

Honestly, I can hardly make sense of the above numbers from the energy certificate. What do you think of this and what can really be said about the energy quality of the constructed building?

Purchase price: €485,000 (final negotiated)

Excerpt from the original listing:
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In Impflingen, a solid construction was completed in 2024 and, thanks to the well-thought-out floor plan, offers enough space over 3 floors in a quiet village location.
On the ground floor, you will find the entrance area with wardrobe, guest WC and storage space under the staircase.
Through the open and bright kitchen, dining and living area, you reach the terrace and the adjacent garden.
The house connection room with direct access from the kitchen area offers plenty of storage space for food and household utensils.

On the upper floor, besides the children's room and storage room, you will find a bedroom with a walk-in dressing room. The modern main bathroom impresses with a large, barrier-free shower and fittings.

In the attic, there is another bedroom, which can also be used as a hobby room, as well as a bright daylight bathroom with bathtub.

A garage with electric sectional door and passage to the terrace and garden area is included in the purchase price and completes the offer.
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Excerpts from the construction description:

Foundation
The building was founded on a reinforced concrete floor slab on gravel filter with load-bearing soil according to static calculation.
The parking space in front of the garage was paved and adjusted to the height profile of the terrain steps.
The insulation on the ground floor was carried out according to the Energy Saving Ordinance (Energieeinsparverordnung).
The foundation sealing against rising damp by means of a WU precast concrete floor slab H=30cm, insulated on the outside with Styrodur and additional moisture barrier, is part of the execution.
The foundation was carried out according to the static calculation.

Plot drainage
The plot drainage is provided using KG plastic pipes.
Combination inspection chamber in the connection area at the property boundary in separated system (separate connections for wastewater and rainwater). Drainage for wastewater (domestic wastewater) with backflow prevention valve. Drainage of rainwater via inspection chamber directly into RW street channel.

Supply lines
Water and telecom supply lines via KG pipes are led into the HAR.
Old supply network was dismantled by Pfalzwerke Netz AG and new electricity supply installed, with electrical cabinet in HAR.

Exterior walls
Wienerberger Poroton blocks T10 36.5 cm on thin-bed mortar.
Plaster surface finished colorfully designed with texture
Base sealing surface smoothed and painted
The executions comply with the requirements of the Energy Saving Ordinance.

Windows
Window elements with accessories
Company Femax, thermal insulation triple glazing with electric shutters

Front doors
Company Femax, aluminum front door 2000x2500 with side panel
Model AK 405

Interior doors
Company MBL-Müller Bauelemente
Interior doors 40mm thick, round profile,
GPL white lacquer, BB lock, hinges
V0020 nickel-plated.

Garage door
Hörmann sectional door LPU42 L-groove
Z fitting, surface Slategrain
RAL 7016 anthracite gray with frame covering 55mm

Roof
Diener Holzbau
Construction was carried out according to statics and thermal protection requirements.
Roof covering executed with roof tiles according to DIN EN 1304.
Steep roof counter battens of impregnated slats 40x80 mm above roof insulation.
Steico underlay boards 35mm thick with double groove
Insulation as mineral wool between rafters WLG 035 according to Energy Saving Ordinance requirements.
Inner side vapor barrier foil with edge connections.
Execution of metal work (gutters, downpipes, metal flashings, connections).
Roof overhang painted twice with Rofalin acrylic light gray.
Velux pivot windows 55x118

Interior walls
Poroton masonry WB-high-hole bricks Plan T10 - 24, 17.5 and 11.5 cm
on thin-bed mortar.

Ceilings
Reinforced concrete precast ceilings according to static calculation Ing. Büro Riesling including necessary additions

FINISHING

Ceiling surfaces
Wallpapered with painter’s fleece and painted white.
Floor constructions
Cement heated screed with Roll-Fix system board and additional insulation
In the ground floor additionally with moisture barrier

Floor coverings
All rooms except bathrooms and utility room laminate on impact sound insulation
Interior plaster
Gypsum plaster
In bathrooms felt plaster
Interior wall areas painted
In main living areas painted white

Floor tiles
Bathrooms, WC, utility room, ground floor - entrance and living area
Fine stoneware wall and floor tiles 60x120 cm
Sealing of the bathroom/shower floor with sealing tapes including shower tray construction
Window sills
Wood white

Stairs
Company Mayer-Treppen
Two-stringer stairs with segment railing
Cantilevered steel substructure
Finished steps and handrail made of beech

Building technology
Electrical connection and own telephone connection point from Telekom
Main distribution in cabinet in the building technology room on the ground floor
Safety devices according to VDE
All living and bedrooms with SAT/LAN connection - satellite dish to be provided by buyer
Provision of the router and connection application as well as commissioning by the buyer
Electric shutters with control via individual switches
Front door bell/intercom wiring laid, end device taken over by the buyer
Room thermostat
Socket switch program Jung AS
Motion detectors with LED
Outdoor socket terrace
Connection for stove/oven

Lightning protection
Foundation earth electrode in the building connection room (central grounding point)

Electric
Company Jung
SCHUKO socket 16a A500 alpine white
Toggle control switch 506KOU universal
Antenna socket ESD30
Double two-way switch 509U
Room temperature controller Alre RTBSB-201.000
Frame AS 581WW AS500 alpine white
Light switch toggle alpine white
Control switch toggle alpine white
Double control switch toggle alpine white
Blinds switch toggle alpine white
Merten MEG1011-9019 stove connection socket countertop polar white
Eltako S12-100-230V impulse switch
Wago 2273-500 mounting adapter
820W WG800 socket 16A
Button 831W WG800

Sanitary
Outdoor taps
On the facade for garden area
Ceramics and fittings
Ground floor
Duravit D-Neo wall-hung WC set rimless deep flush toilet
Upper floor
HansGrohe shower fitting
Hand shower set including shower hose
Rain showerhead
Shower tray mineral cast BREUER
Modern Line stone look white
Deep flush toilet
White Circular 80 light mirror
Attic
Bathtub with accessories
Washbasin faucets - buyer’s responsibility

Heating
Heat generation
Central for the house air heat pump Bosch CS7001i/7400iAW IR/OR
Air/water heat pump system Compress 7001iAW, indoor unit AWBM with integrated
buffer storage and electric auxiliary heater, external hot water storage
Outdoor unit including sound insulation base

Heat distribution
via underfloor heating
All living and bedrooms as well as bathrooms are individually controllable

Outdoor area
Parking space surface paving stones burnt clay 6cm satin-finished, linear and impregnated
surface. Edges straight, Amiata, 50/30/6cm with substructure
With base formation with sealing tape, lawn edging and gravel rattles around building edges
(where no direct paving connection with dimpled membrane takes place)
Planting in garden lawn and terrace area plants with bark mulch
Terrace GARDENER WPC terrace plank
Hollow chamber profile light gray, finely ribbed / smooth

First occupation also means 5 years warranty according to the Construction Code. The builder is also the architect. The property was listed on Immoscout - without agent.

Thanks in advance to you all!

I can honestly say I can hardly make sense of the above mentioned numbers from the energy certificate. What do you think about it and what should one actually make of the energy quality of the constructed building?

It’s a new building, so it’s not worth talking about the heating costs and the energy quality.

Thanks in advance to you all!

What exactly is your question? Cute little house. Does the child have a great space under the roof including a bathroom and do you have a nice study room on the upper floor? The terrace with a view of the "wall" is not for me (a bit dark), but you also have a bit of garden. I took a look at the listing and the pictures. You know the location better than we do, but the price seems appropriate for the house.

It is a new building, so it’s not worth talking about heating costs and energy efficiency.

What exactly is your question?

Sweet little house. The child has a great space under the roof including a bathroom, and you have a nice study on the upper floor. The terrace with a view of the "wall" is not my thing (a bit dark), but you also have some garden. I took a look at the listing and the pictures.
You know the location better than we do, but the price seems appropriate for the house.

It will show how effective the heat pump is with the underfloor heating and the general construction method, I think. I have no experience with heat pumps yet – I’m curious. We definitely want to move towards a photovoltaic system in the medium term. Unfortunately, there is currently only one meter with peak and off-peak rates in the utility room.

Regarding my question: My main concern was whether anyone can assess the price/performance ratio of the house in relation to the construction description with the building materials used and considers it fair. We are at about €4,217 per m² – the pure land reference value is €330 / m², whereas the market value will certainly be more around €450-500 due to the local proximity to the university town Landau (2 km).

It remains to be seen how effective the heat pump is with the underfloor heating and the overall construction, I think. I have no experience with heat pumps yet.

Effective or efficient? Effective without problems. The soft heat pump was installed very precisely (performance) and what does the heating load calculation look like? Whether efficient depends on the design and the settings. But whether the heating costs end up being €350 or €400 depends more on you than on the heating system (windows open/closed, indoor temperature, ventilation, etc.).

We definitely want to move towards a photovoltaic system in the medium term. Unfortunately, there is currently only one meter with peak and off-peak tariff in the utility room.

Then do that. One meter is enough for that. I don’t have more either.

Regarding my question: I was primarily concerned whether someone could comment on the price/performance ratio of the house

So, land about 80-85k. That leaves 400k for the house. Subtract 15k for the garage and 25k for the outdoor areas. That leaves 360k for the house. Then simply deduct 40k for incidental costs. That leaves 320k for the house. We distribute that over a 115 sqm house, and you are under €3,000/sqm. That is a) cheap and b) you don’t have all the other issues related to building the house.

Effective or efficient?
Effective without problems. Soft WP was installed very precisely (performance) and how is the heat load calculation done?
Whether efficient depends on the design and the settings. But whether it ends up being €350 or €400 heating costs depends more on you than on the heating system (windows open/closed, indoor temperature, ventilation, etc.).

Then do that. One meter is enough for that too. I don’t have more than that either.

So plot about €80-85k
Remaining €400k for the house. Subtract €15k for the garage and €25k for the exterior facilities.
Remaining €360k for the house. Simply deduct €40k for incidental costs.
Remaining €320k for the house.
We spread that over 115 sqm house, and you are under €3,000/sqm. That is a) cheap and b) you don’t have all the construction-related issues for the house.

I meant efficient of course :-D
A Bosch CS7001i IR/OR air heat pump with
air/water heat pump system Compress 7001iAW, indoor unit AWBM with integrated
buffer tank and electric auxiliary heater, external hot water storage according to the building description was installed.
It should have between 5-7 kW output – but I don’t know exactly right now. Unfortunately, I’m not familiar with heat pumps with underfloor heating systems etc. I’m basically a complete layman.

It should have a power output between 5-7kW – but I don’t know the exact number right now.

That was my question. A 5kW one should easily be enough. I currently heat my renovated old building with 120sqm to 22-23 degrees with about €350 p.a. including hot water.
A 5kW (not Bosch) is already slightly oversized there.

Unfortunately, I don’t know much about heat pumps with underfloor heating etc. I’m basically a complete layman.

You can certainly get help with that here.