Less German paperwork.
More time for the job.
Create documents, understand building rules and run your projects – in your language. For construction companies and tradespeople in Germany.
RechnungAngebotdocumentsmeetingsmeasurementsbuilding law
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Just say what you need
Not sure whether you need an Angebot, a Kostenvoranschlag or a Nachtrag?
You don't need to know.
«The client wants a rough idea of what the bathroom renovation will cost.»
Looks like you need a Kostenvoranschlag
A non-binding cost estimate for the client – without the commitment of an Angebot.
How big is the bathroom, and what's included: tiling, plumbing, electrics?
Prepare KostenvoranschlagType it or say it:
«The client wants a rough idea of what the bathroom renovation will cost.»
BauWalker suggests the right document, asks the questions it needs and prepares it.
Rechnung and Angebot
Documents without hours at the computer
Tell BauWalker what you did – by text or voice.
With it you create:
- Rechnunginvoice for completed work
- Angebotbinding quote for the client
- Kostenvoranschlagnon-binding cost estimate
- Abschlagsrechnunginterim invoice for a stage
- Nachtragadditional work added to the contract
If a detail is missing, BauWalker asks – then the document is produced in German. The scope depends on the plan – see Pricing.
Your language
Work in your own language
German stays in the documents – not in your head.
Talk to BauWalker in English, German, Turkish, Polish, Russian, Ukrainian or Romanian.
You explain the task in your language – BauWalker turns it into the German document.
«Create an invoice for painting walls, 85 m² at 18 euros.»
Rechnung
Wände streichen
85 m² × 18,00 €
Contracts and rules
Don't understand a letter, a contract or a rule? Just ask.
For example:
«The client wants to deduct 3% Skonto. Can they do that?»
You learn in plain words what it means, what it means for your project and what to do next.
Help with understanding documents and building rules – not legal advice.
measurements
Upload a plan – get the areas.
- 33
- rooms
- 1,038 m²
- of walls
- 439 m²
- of floor
You get rooms, wall and floor areas straight from the plan – PDF, DWG or DXF – and fill them straight into the quote or measurement.
Calculation is possible according to WoFlV (Wohnflächenverordnung).
measurements
Alexanderstraße 3-5, 10178 Berlin
Alexanderstraße 3-5 · WE3.pdf
WE3 · 9 rooms · 2 balconies
Walls: 26 · Floors: 11 · Wohnfläche: 117.63 m²
125.68 m² · net 117.63 m²
meetings
Upload a recording of a meeting or a conversation.
You get:
- Key points
- Decisions
- Tasks
- Deadlines
For example:
Key points: The screed is delayed by 4 days.
Task: prepare the Nachtrag by Friday.
Documents per project
Stop digging through folders and chats
Save documents per project and find them again quickly.
RechnungenAngeboteVerträgePläneNachträgeProtokolle
Nassauische Str. 37A
6 documents
- Angebot Nr. 2026-017PDF · 12.09.2026
- Bauvertragsigned · 18.09.2026
- Grundriss UGplan · 05.10.2026
- Nachtrag 01draft · 06.10.2026
- Protokoll Baubesprechungrecording → text · 06.10.2026
- Rechnung Nr. 2026-041sent · 07.10.2026
Price
All of this – €15 a month
BauWalker
15 €per month
- Progress invoices, Aufmaß with AI, meetings and chat – all in one plan
- Multiple languages
- Built for working in Germany
Price excludes VAT.
14 days free
Need access for your team? Compare the Team and Pro plans
Invoices from the chat as an e-invoice on request: XRechnung 3.0 according to EN 16931.
Developed in Germany.
Servers in Germany. Personal data is generally processed by a locally operated AI. Learn more
- AI transparencyModels, data processing, limits and human oversight (page in German).
FAQ
Frequently asked questions
How is BauWalker different from a regular AI chat?
BauWalker is not just an AI chat but a working platform for construction businesses: every request runs in the context of your projects, documents and contracts. The platform remembers projects and decisions, is built around German construction law (VOB/B, BGB) and creates finished documents – minutes, Nachträge, invoices, payment plans. A regular chat gives you an answer, BauWalker gives you a work result.
Which documents can BauWalker prepare?
Rechnung, Angebot, Kostenvoranschlag, Abschlagsrechnung and Nachtrag. You tell BauWalker what you need – by text or voice – and it asks for what's missing and prepares the document in German.
Which language can I work in?
You can talk to BauWalker in German, Turkish, Polish, Russian, Ukrainian, Romanian or English. BauWalker prepares the document in German.
Where is my data processed?
The platform runs on servers in Germany (Hetzner). Project, contract and personal data is generally processed by an AI model operated locally on the server. The AI transparency page describes the exceptions.
How much does BauWalker cost?
€15 per month excl. VAT – with all core features and several languages. The first 14 days are free. Teams can choose the Team and Pro plans (see Pricing).
Does BauWalker replace a lawyer or tax advisor?
No. BauWalker helps you understand situations faster and prepare documents, but it does not replace a lawyer, tax advisor (Steuerberater) or other qualified professional. Please check results before using them.