Legal & Advice

Renovation Threshold Calculator Agent

Planning happens now; the sums come later. By the time someone calls back, the slot has gone.

Calculates the threshold, the headroom and the workings deterministically from the inputs.

Open agent
Public administration

Four processes that take up the most time today

Developed in Germany · Hosted in the EU

Developed in Germany · Hosted in the EU or on-premises

Delivered together with

STACKIT Sovereign hosting in Germany, single-tenant from the first user.
Rödl Legal, tax and compliance expertise for legally sound deployment.
4P Consulting Advisory and implementation for the public sector, starting with the AI readiness assessment.

The question comes up on the phone; the answer needs the purchase contract and three years of receipts.

The landlord asks whether the planned renovation still works out. To answer, someone has to pull together the purchase contract with its allocation of the price to the building, the works already booked and the quotations on file. That takes longer than the call, so the firm calls back, and until then the landlord plans without a figure.

3quotationsEstimates for the roof, bathroom and windows come to 41,200 euros net in total.
14,400euros already bookedHeating and electrics from the previous year are already in the property account.
57,900euro thresholdIt is derived from the building share of 386,000 euros in the purchase contract and applies for the three years after purchase.
2,300euros of headroomThat is what remains below the threshold if all three quotations are accepted.

Before the call ends, the 2,300 euros of headroom and the nine calculation steps are on screen. That is what makes the assessment 50% faster, and nobody has to dig out the purchase contract.

The 50% gain in assessment speed is this agent's headline figure. The quotation totals, the previous year's works and the headroom of 2,300 euros are a worked example, not survey data.

Three steps through the process.

The tax specialist assesses the planned renovation; the agent only calculates the threshold and the headroom and shows every step of the calculation.

Capture the property's input values

The agent takes the purchase price, building share, acquisition date and the works already booked. If a value is missing, it stops the calculation and names the gap.

Property Kirchfeld 22, acquired 14 March 2024, building share 386,000 euros

Show the headroom to the threshold

The agent adds up the works already booked and the planned quotations and compares them with the threshold. If the landlord changes an input, it recalculates at once.

Threshold 57,900 euros, 55,600 euros booked and planned, headroom 2,300 euros

Output the workings behind the result

The agent lists every subtotal with its source, from the purchase contract to the last quotation. The tax specialist works through the calculation and gives the landlord the assessment.

grenzwert_kirchfeld-22.pdf, 9 calculation steps, each line with its source

What the agent does not do.

It gives no tax advice.

It shows the calculation and its intermediate steps. What the landlord hears as an assessment comes from the tax specialist.

It does not judge whether an item of work belongs in the total.

For the new fitted kitchen, that depends on how the work is classified. The tax specialist makes that call; the calculator then uses the amount.

It does not file the result in the property file itself.

It outputs the workings for Kirchfeld 22 as grenzwert_kirchfeld-22.pdf. The tax specialist decides whether it goes into the property file and in which version.

Connected systems

  • Property master data at the firm
  • history of works in the property account
  • landlord's quotation file

Operations

  • Deployment modelEU cloud, private cloud or on-premises
  • Data processingGDPR-compliant, no model training on your data
  • Responsible teamsTax firms, landlords, renovation planning

The questions that come up before the first meeting.

How quickly is the Renovation Threshold Calculator Agent ready to use?

A pilot typically runs on your own data within 4 to 6 weeks. The agent connects to your existing systems rather than running as a separate, parallel environment.

Where is the data processed?

EU cloud, private cloud or on-premises. Processing is GDPR-compliant and models are never trained on your data. Details in the Trust Center.

Where does the figure “50% faster assessment” come from?

It is based on experience from comparable projects and process benchmarks, not a commitment. We work out the realistic effect for your organisation during the assessment before the pilot.

Related agents.

Intake review, case 2026/04711

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