A quote for a paved area is quick to calculate: square metres, base layers, paving units, jointing material, edge restraints. The line item that shifts the final price is rarely on the customer's mind and often not properly stated in the quote: the excavated soil and what happens to it. Anyone digging out sixty cubic metres has sixty cubic metres of material that has to go somewhere, and where it may go is not decided on site but in a laboratory report and in two ordinances. This article collects the thresholds, deadlines and retention duties that apply, and translates them into quote line items, form fields and sections of a services page.
Key takeaways
- At 122.1 million tonnes (Initiative Kreislaufwirtschaft Bau), excavated soil and stones form the largest mineral waste stream on German construction sites, ahead of demolition rubble.
- Up to 500 cubic metres (Federal Soil Protection Ordinance) the laboratory analysis may be omitted if inspection and previous use show nothing. Above that only an expert's preliminary survey carries the exception; otherwise sampling costs belong in the quote.
- Placing certain mineral substitute building materials from 250 cubic metres (Substitute Building Materials Ordinance) triggers a four-week advance notification, followed by a completion notification within two weeks.
- The delivery note may be omitted for clean soil material up to 200 tonnes (Substitute Building Materials Ordinance), but has to be kept for five years wherever it does arise.
- If the soil turns out other than assumed, the client's right to order changes takes effect after 30 days (German Civil Code) without agreement. Until then, what the quote described is what counts.
Why the excavation moves the quote
Two firms price the same driveway and end up several thousand euros apart, without either of them having miscalculated. The difference as a rule sits in the same line: one costed the excavation as disposal at landfill rates, the other as recovery at backfill rates, and neither of them knows at quotation stage which case will occur. That very uncertainty belongs on the website and in the quote rather than in a conversation at the site fence. On a homepage for paving contractors the section on excavation is the one most often missing, even though it generates the most follow-up questions.
Since 1 August 2023 this field has been governed by a new framework of two ordinances published together as the Mantelverordnung: the Substitute Building Materials Ordinance for placement in engineered structures, and the amended Federal Soil Protection Ordinance for everything that goes back onto or into the soil. Both work with quantity thresholds, material classes and notification deadlines. For a contracting firm this means the excavation is no longer a line item you estimate in the round, but a chain of decisions with documented intermediate steps. A firm that maps this chain in its quote is selling diligence rather than a lump sum.
The chain does not only apply to large sites. A thirty square metre terrace also produces excavated material, and there too the questions of origin, contamination and destination arise. What differs is the threshold at which a duty starts. Knowing the thresholds lets you separate cleanly in the quote between what will certainly arise and what depends on an investigation. How to describe technical sequences for private clients without playing them down is covered in the article on explaining paving work.
The largest material stream in numbers
Anyone who assumes demolition rubble dominates construction waste is underestimating their own excavation. In the 2022 reporting year, 122.1 million tonnes (Initiative Kreislaufwirtschaft Bau) of the mineral construction waste arising in Germany was soil and stones, which is 58.7 percent of the total volume. Demolition rubble reached 55.2 million tonnes. Across all waste types, construction and demolition waste made up half of German waste arisings in 2024 at 182.8 million tonnes (Federal Statistical Office). For 2022 the German Environment Agency puts mineral construction waste at almost 208 million tonnes and its share of total waste arisings at 61 percent (German Environment Agency); that share is calculated against a narrower base than the official waste balance and therefore does not sit alongside the 2024 share. Both calculations point the same way, and that is why the legislator demands records precisely here.
Soil is the main stream
122.1 million tonnes (Initiative Kreislaufwirtschaft Bau) of soil and stones against 55.2 million tonnes of demolition rubble in 2022. What looks like a side issue on your site is the single largest item nationwide.
Recycling is not the standard route
Of those 122.1 million tonnes, 75.2 percent (Initiative Kreislaufwirtschaft Bau) went to opencast mining and landfill construction, and only 11.5 percent became recycled building materials. At processing plants, excavated soil accounted for just 12.6 million tonnes (Federal Statistical Office) of deliveries in 2024, one sixth of the total.
Contaminated material is an exception, not a footnote
In 2024, construction and demolition waste made up the largest share of hazardous waste in Germany at 38.8 percent (Federal Statistical Office), 8.9 million tonnes in absolute terms. For that portion the electronic manifest applies.
The market behind it
German landscaping turned over a nominal 11.11 billion euros (BGL) in 2025, roughly 57 percent (BGL) of it in private gardens. There it is a layperson reading the quote, not a site manager, and the excavation line has to make sense to them.
Soil stands out on recovery rates: it reached 86.7 percent (Initiative Kreislaufwirtschaft Bau) for soil and stones against 95.8 percent for demolition rubble, road planings and site waste combined. Across all fractions the construction sector reported 90.4 percent (Initiative Kreislaufwirtschaft Bau) for 2022 for the first time. And of everything actually disposed of, 81.9 percent (Initiative Kreislaufwirtschaft Bau) was soil and stones. So anyone advertising high sector rates on their website should know that the European target of 70 percent by weight (Waste Framework Directive) for construction and demolition waste expressly excludes naturally occurring material in waste category 17 05 04. The rate therefore says little about the excavation itself. Where such figures may appear in external communication and where they may not is covered in the article on advertising with prices and claims.
Sampling: when it may be omitted
The first branch in the disposal route is whether laboratory work is needed at all. An analytical investigation may be dispensed with if a preliminary survey by an expert shows no indications that precautionary values are exceeded, or if the quantity arising is no more than 500 cubic metres (Federal Soil Protection Ordinance) and the visual inspection at the point of origin together with the previous use of the site is unremarkable as well. That is not an exemption but a chain of conditions: if one condition falls, the exception falls with it. A front garden with a heating oil tank buried under it until the eighties is a case for analysis even at twenty cubic metres.
For pricing this means sampling is a conditional item. It belongs in the quote with a price, but with the condition next to it under which it arises. Leave it out and you negotiate it later as a variation; include it as a flat charge and you lose jobs to firms that leave it out. The third option is the most honest one and is easy to explain on a services page: an item with a unit price, one sentence on the trigger condition, one line on the effect on the schedule. How to present price components transparently without turning them into a commitment is covered in the article on showing prices on your website.
- Ask about previous use. Filling station, workshop, made ground, rubble store: what stood on the site before 1990 decides the price more often than the soil type does.
- Inspect at the point of origin. Smell, foreign matter, colour changes in the trial pit. The finding is written down, not remembered, because it later carries the exemption from analysis.
- Estimate the quantity. Up to 500 cubic metres (Federal Soil Protection Ordinance) the exception rests on visual inspection and previous use alone. Above that only an expert's preliminary survey carries it; otherwise the investigation is due.
- Plan for interim storage. On the basis of one investigation, no more than 3,000 cubic metres (Substitute Building Materials Ordinance) of soil material or dredged material may be placed on the market. A stockpile does not replace sampling indefinitely.
- Watch the humus content. Where the organic carbon content exceeds 1 percent by mass (Federal Soil Protection Ordinance), the material may only be applied under additional conditions and must not come from topsoil.
- Peat and bog soil are edge cases. From 9 percent by mass (Federal Soil Protection Ordinance) of organic carbon the precautionary values no longer apply at all and the assessment benchmark is derived case by case. That costs expert time and belongs in the programme.
The documents from this step are not filing material for the office cupboard. Records of the origin and investigation of the material have to be kept for ten years (Federal Soil Protection Ordinance) after completion of the works and produced to the authority on request. In practice the client needs them at least as urgently as the contractor does, for instance when selling the property. A copy attached to the final invoice is therefore not extra effort but an argument.
The transitional period that causes confusion
Two deadlines that belong in the schedule
The most expensive mistake in excavation is rarely a wrong price but an application filed too late. The placement of certain mineral substitute building materials has to be notified to the competent authority in writing or electronically four weeks before it starts, once the intended total volume is at least 250 cubic metres (Substitute Building Materials Ordinance). Four weeks are no problem for a job discussed in February and built in April. For a job confirmed on Monday and due to start on Thursday, they are the end of the schedule. That is why this deadline belongs not in site management but in the quotation stage and on the services page.
The second deadline runs after placement. Within two weeks of completion (Substitute Building Materials Ordinance) of the works, the user determines the quantities and material classes actually placed from the collated delivery notes and submits the completion notification to the authority. Anyone who starts looking for the delivery notes at that point has postponed the problem, not solved it. A simple site photograph of the delivery notes on the day of delivery saves the search, and the same photographs later serve as documentation for the client. How the enquiry form can collect the necessary details before the site visit is a question of the field list, not of design.
| Procedure | Threshold | Deadline or duty |
|---|---|---|
| Placing mineral substitute building materials in an engineered structure | from 250 cubic metres total volume | Advance notification four weeks before the start to the competent authority |
| Completion of the works | where placement was notifiable | Completion notification within two weeks with actual quantities |
| Applying or incorporating material onto an area | more than 500 cubic metres in volume | Notification at least two weeks before the start with location, type, quantity, purpose |
| Delivery note for clean soil material of class 0 | up to 200 tonnes placed | May be omitted, mandatory above; retention for five years |
| Documentation of separate collection | from 10 cubic metres total volume | Documentation duty under the Commercial Waste Ordinance |
| Hazardous waste at the producer | more than two tonnes per year | Record keeping with an electronic manifest |
| Analytical investigation of the soil material | above 500 cubic metres or on suspicion | Sampling or an expert survey before recovery, records kept for ten years |
Two rows of this table are regularly confused. Placement in an engineered structure, meaning under paving, paths and base courses, follows the Substitute Building Materials Ordinance with its four-week deadline. Applying or incorporating material onto an area, meaning modelling, ground raising or a new vegetation layer, follows the soil protection ordinance: there, for more than 500 cubic metres, notification is due at least two weeks before the start (Federal Soil Protection Ordinance), stating the location, type and quantity of the materials and the purpose. A site with both procedures has both deadlines.
The sentence that belongs in every quote
Where the soil goes
After the material class the route branches. Clean soil can usually be reused, either on the same site or at a backfill facility. Separate requirements apply to the new root-penetrable soil layer: mineral foreign matter is permissible provided it was already contained in the material when it arose and its share does not exceed 10 percent by volume (Federal Soil Protection Ordinance). Rubble in the topsoil is therefore not a cosmetic flaw but a limit. Where the subsequent use is horticultural, contaminant levels in the resulting layer should only reach 70 percent of the relevant precautionary values (Federal Soil Protection Ordinance), because future inputs from cultivation and from the air are factored in. What that layer is then planted with decides the follow-up cost: the comparison of turf and seed sets both routes against each other.
Where material is placed beneath the root-penetrable layer, a minimum thickness above it may be required: when an excavation or an open-cast mine is backfilled and when masses are balanced within a construction project, a root-penetrable soil layer at least 2 metres (Federal Soil Protection Ordinance) thick has to be applied over the incorporated materials, unless an engineered structure is being built on the area; the competent authority may permit lesser thicknesses case by case. Where this item does arise, it is routinely missing from quotes even though it costs material, haulage and placement. For placement in engineered structures the distance to groundwater additionally governs the permissible method: a favourable groundwater cover layer exists where the unsaturated seepage path is more than 1 metre plus (Substitute Building Materials Ordinance) a safety margin of 0.5 metres. Anyone working on a de-paved area will know this calculation from unsealing as an enquiry driver.
- Reuse on the same site. The shortest route and the cheapest. It requires quantity, quality and levels to match, and someone to have checked that in the quote.
- Recovery at a backfill facility. The standard case for clean excavation. 75.2 percent (Initiative Kreislaufwirtschaft Bau) of arisings took this route in 2022, mostly into landfill construction and opencast mining.
- Processing into recycled building materials. The narrowest route: only 11.5 percent of arisings were recovered this way in 2022, and at the plants themselves excavated soil made up only 12.6 million tonnes (Federal Statistical Office) of deliveries in 2024.
- Disposal at a landfill. The most expensive route and the one that makes the material class costly. 81.9 percent (Initiative Kreislaufwirtschaft Bau) of all mineral construction waste disposed of was soil and stones.
- Hazardous waste. From two tonnes (Waste Verification Ordinance) per year the small-quantity rule ends and record keeping with an electronic manifest begins.
Separate collection: the threshold applies only to the documentation
What belongs in the quote line
A robust excavation item consists of five statements, and none of them is a price. It describes the assumed quantity, the assumed material class, the assumed disposal route, the condition under which that changes, and the document that exists at the end. The price follows from those. Quotes that instead write "excavation disposal, lump sum" push the entire risk into one line that nobody can take apart later. How a quote is structured so the customer accepts it rather than comparing it is described in the article on a quote that gets accepted.
The second building block is separating the service from the condition. Sampling is a service, the material class is a result. Put both in the same line and you cannot later justify the additional cost cleanly. In practice two lines suffice: one for the investigation at a fixed price, one for disposal at a unit price per tonne and material class. That prepares the variation arithmetically before it arises.
- Quantity with a source. Cubic metres from the levels plan, not from instinct. The bulking factor belongs with it, otherwise the container count is wrong.
- Assumed material class. Up to 200 tonnes of clean soil material the delivery note may be omitted, above that it is mandatory. The assumption belongs in the quote so the deviation becomes visible.
- Disposal route with a destination. Backfill site, processing plant or landfill are different prices and different haulage times. A destination without a name is a guess.
- Trigger condition for the variation. One sentence describing what happens if sampling shows a higher class. Without that sentence the discussion starts from nothing.
- Document at the end. Delivery note, weighbridge ticket, disposal record, laboratory report. Whoever places material on the market has to keep the delivery note as a carbon copy or copy for five years (Substitute Building Materials Ordinance).
- Deadlines in the schedule. The four-week advance notification and the two-week completion notification are dates, not formalities. They belong next to the delivery date for the paving units.
What comes out of this is not a longer discussion but a shorter one. The customer sees that the uncertainty is named and bounded rather than suspected inside a lump sum. For handover the same principle applies as with other trades: a described outcome can be checked, an impression cannot. What role the description in the quote later plays for defect claims is set out in the article on warranty in landscaping.
Extra quantities: what construction contract law provides
If the soil turns out other than assumed, that is not a dispute but a regulated procedure. The client may request a change to the works, and if the parties reach no agreement within 30 days (German Civil Code) of receipt of the change request, the client may order the change in text form. For the contractor the deadline means two things: it protects against an immediate order, and it runs while the site stands still. A firm that submits a verifiable variation quote in that time is negotiating; a firm that stays silent is waiting.
Payment is regulated too. When calculating instalment payments, the contractor may apply 80 percent (German Civil Code) of the additional remuneration stated in a variation quote where the parties have not agreed on the amount and no court decision provides otherwise. That defuses the classic conflict over excavation, where the extra quantity has long since been hauled away while the unit price is still under discussion. How a variation is documented and communicated without the site coming to a halt is shown in the article on handling variations properly.
1. Record the finding before hauling
Photograph, date, location, depth, a short description of the material. Five minutes on site replace a later discussion about recollections.
2. Commission sampling and announce it
The client learns the same day that an investigation is running, with cost and duration. A surprise that was announced is no longer one.
3. Variation quote with a unit price
Quantity, material class, destination, price per tonne. Structured so it can be checked, because the 30-day period otherwise runs without a basis.
4. Records with the final invoice
Laboratory report, weighbridge tickets, disposal records. The client needs them for ten years, not just until payment.
Photograph, date, location, depth, a short description of the material. Five minutes on site replace a later discussion about recollections.
The client learns the same day that an investigation is running, with cost and duration. A surprise that was announced is no longer one.
Quantity, material class, destination, price per tonne. Structured so it can be checked, because the 30-day period otherwise runs without a basis.
Laboratory report, weighbridge tickets, disposal records. The client needs them for ten years, not just until payment.
These four steps are not a bureaucracy programme but the shortest version of what the firm does anyway. The difference lies in the order: record the finding before hauling and you have a variation; describe it afterwards and you have an assertion.
The services page: making the excavation visible
On a website the excavation is not a chapter of its own but a section within the service that produces it. A firm offering paving, terraces or driveways describes there, in four to six sentences, what happens to the soil, which investigation becomes necessary when, and which documents the customer receives at the end. That replaces the follow-up call, and it pre-qualifies the enquiry: someone who states in the form that a workshop once stood on the site has already supplied the most important piece of information. Which fields make sense depends less on the trade than on the decision they prepare. A firm that also offers playground inspections knows the pattern already: a recurring duty becomes a described service. An overview of the services helps with the cut.
{
"area_sqm": { "type": "number", "required": true, "hint": "a rough estimate is enough" },
"base_known": { "type": "select", "options": ["natural ground", "old surface", "unknown"] },
"previous_use": { "type": "select", "options": ["dwelling", "workshop", "commercial", "agriculture", "unknown"] },
"made_ground_suspected": { "type": "yes_no_unsure" },
"soil_destination": { "type": "select", "options": ["should stay on site", "should be hauled away", "still open"] },
"site_access": { "type": "select", "options": ["container can be placed", "small machines only", "unclear"] },
"records_wanted": { "type": "multi", "options": ["laboratory report", "weighbridge tickets", "disposal record"] }
}Seven fields, five of them a selection. The answers do not decide the price, but they do decide the site visit: knowing that made ground is suspected means bringing the hand auger. Below that the page should carry a short image sequence showing the excavation, not only the finished paving. A portfolio gallery with earthworks photographs works on exactly the customer group that otherwise cannot explain the price difference between two quotes.
Sentences that belong on the page
Technical terms do not put people off; unexplained technical terms do. The following formulations are built to carry a figure without making a commitment. They can be used unchanged on a services page for paving work and give the consultation a structure.
- "Up to an excavation quantity of 500 cubic metres the laboratory investigation may be omitted if inspection and previous use show no indications. Above that only an expert's preliminary survey carries the exception. We check that before quoting."
- "Where we place material in an engineered structure, we notify the authority four weeks in advance from 250 cubic metres. That deadline is in our construction schedule."
- "You receive the laboratory report, the weighbridge tickets and the disposal record with the final invoice. The documents have to be kept for ten years."
- "Mineral foreign matter in the topsoil is permissible up to a share of 10 percent by volume if it was already present when the material arose. Anything above that is screened out."
- "If sampling shows a higher material class, the disposal route changes. We invoice the additional cost per tonne, not as a lump sum."
- "We collect construction waste separately; from ten cubic metres we additionally document it. That is why several containers stand on site."
Six sentences, six figures, no promise about an outcome. That is exactly the difference between a description of services and an advertising claim. Carry them into the quotation text and you have the same language on the page and in the document, and the customer recognises both. If questions remain, the route runs through contact rather than through a price discussion. An overview of pricing for the website itself rounds this off when the site is being built from scratch.
The documents have to be kept for ten years after the application or incorporation works have ended and produced to the competent authority on request. Lifting that sentence onto the services page promises nothing; it describes a duty the firm has anyway and turns it into an argument for the way the firm works.
Sources and studies
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