Demolition of existing bungalow, preparation, procedure?

I recognize it by the (typical for WDVS) insertion of the FB at the sides and the deeply recessed installation level of the windows themselves. But as I already said, I could also be mistaken. Only the OP can solve the puzzle ;-)

I think you can tell by the (typical for ETICS) recess of the window frame on the sides and the deeply set installation plane of the windows themselves.

My monolithically built townhouse from the 70s had that too. But whatever… it was and still is allowed to renovate “critical” houses with ETICS ;) The left window is probably the original one, the right was likely replaced during the renovation.

We partially demolished ourselves, everything except the masonry. Some of it was reused in sheds, etc., so it was properly dismantled. For example, we had a metal roof that my son dismantled and will reuse on a shed. I also offered some of it on classifieds; people then dismantled and picked it up themselves. We properly separated everything that was no longer usable, e.g., the old insulation, and took it ourselves to the dump. We needed tools appropriate for the specific parts we dismantled. You can’t generalize. But we had all of that.

For the demolition, we needed a demolition permit, which was applied for and granted together with the building permit. The employee wanted proof of where the old materials were disposed of. It was enough for her when we confirmed that a part was reused and showed her the dump receipts for the rest. Our general contractor demolished the masonry; the company name was enough for her.

For the disassembly of the utilities, I contacted the respective providers. Water was shut off and separated. The water supplier first had to locate the pipes; they didn’t know where they were. Electricity had to be rerouted since we shared a main line with the neighbors. But it was routed straight into the construction power box and then to the new house, so there was always power on the property. We separated wastewater ourselves on the property and then reconnected it to the new house. But no one cared about that. The telephone could stay because the connection is in the garage, which remained.

The house looks like an expanded solid garden shed, here in the area in Berlin something like that is demolished in one day by companies, but they expect 30-50K€. We had demolition, construction road and subsequent paving awarded as a package 3 years ago, that came to about 65K€. But today's prices

The right part is obviously a later extension. The 3-part window on the left is actually a GDR window with a wooden core.

Of course, it can be demolished. Water and electricity should not be a problem. They can be redirected. The new main electrical connections are usually at the property boundary with an outdoor box. In the GDR, water was mostly in a separate shaft. You could then separate after the water meter. The basic fee remains, of course.

Wood can be given away, burned, kept, and used otherwise. Roofing felt, etc., must be disposed of. If built solidly, it can be demolished with an excavator. Everything in one pile. Then rent a mobile crusher and crush everything. Reuse or sell the recycled gravel.

Metal to the scrap yard.

Not much remains and it doesn’t cost a fortune.

I had also meticulously planned the demolition of our house until I came across a demolition company on a classifieds portal. I had them make me an offer and lo and behold: hardly more expensive than doing it myself. Just try your luck.

If not, you should consider the following (refers to Bavaria; the list is not in chronological order):
- Clarify whether the house is solid construction or timber frame construction, as this significantly determines the machine usage
- Is there a basement? Masonry/concrete?
- Concrete slab or (basement) strip foundations?
- With a solid house and/or basement/foundations, no chance without a large excavator (the 30t excavator had a hard time with our steel-reinforced strip foundations)
- Are hazardous substances installed? Is a building description available? Manufacturer/model known? -> Try to get hold of a building description
- If impossible and suspicion of asbestos -> test kits are available online for €50 per test
- When working with asbestos, be sure to observe TRGS519 and contact authorities in advance (special site labeling, requirements, etc.)
- Determine the quantities of the individual waste types and plan the containers / self-delivery
- Always pack mineral wool in "KMF bags," asbestos airtight in "big bags"
- Plan enough time
- PPE is MANDATORY!
- Market, market, market -> We sold: windows and doors (€150), oil heating without oil €300, cables €50, copper gutters €700, scrap iron €50, aluminum €40, wooden beams €300, light well grates €40, concrete paving gifted (saved disposing of 12 tons of construction waste), spray protection around the house gifted (saved disposing of 2 tons of construction waste), oil tanks (empty) gifted, and so on...
The most expensive offer was €40k; we got it done for a little more than half of that, with 80% of the costs going to the demolition company and 20% accounted for by in-house scopes (disposal costs, equipment rentals, rework).