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An AI knowledge base for residential developers
Short answer
An AI knowledge base at a residential developer finds, for customer service, the accepted buyer change and the drawing attached to it, in place of the floor plan from the sales brochure, with links to both documents. At Syntalith an AI app on company documents costs from €3,000 net. At 400 buyer questions a month with 15 minutes of searching each, it pays back in 1.0 month.
- 1:1 course or for a team of programmers
- Let’s talk
- work on the participants' repository
- Claude Code, Codex
- talking to an engineer about the scope
- €0
We belong to the OpenAI and Anthropic partner programmes and learn through their official courses. What this means ↓
Author: Syntalith · 3 min read
Statistics
AI knowledge bases: statistics 2026
1.0 mo.
payback of a €3,000 app at 400 buyer questions a month: €3,490 of searching today, €530 with the app. Scenario.
15%
According to Brynjolfsson, Li and Raymond (2025), customer support agents working with AI resolved 15% more issues an hour on average, in a study of 5,172 people.
Source: Brynjolfsson, Li and Raymond, The Quarterly Journal of Economics (2025) ↗
47%
According to the European Commission (2026), customer service is the most common use of AI among EU SMEs and mid-caps that already use it: 47%.
Source: European Commission, Flash Eurobarometer 578 (2026) ↗
24.8%
According to Eurostat (2025), 24.8% of EU enterprises in real estate activities used AI.
49%
According to Anthropic (2024), combining contextual embeddings with BM25 search cut failed retrievals by 49%, and by 67% with reranking.
Figures checked: 22 October 2026
The plan the buyer is asking for
A buyer agreed to move a partition wall in their flat. The flat's case records the accepted change with a revised plan, while the library still holds the earlier plan and the floor plan from the sales material. A new person in customer service gets a request for the plan that includes the change.
- 01PlanThe assistant points to the agreement and the drawing for the right flat.
- 02BuildingWhen flat numbers repeat across buildings, the employee gives the building.
- 03ConstructionThe question of whether the wall has been moved goes to the project team with the plan.
- 04RecordThe team's answer returns to the same case.
The record of an accepted change does not confirm that the work has been done. If no drawing is attached to the change, the assistant shows what it found and what is missing, and the person who handles buyer changes gives the explanation.
What a developer knowledge base costs and when it pays back
- Today
- 400 buyer questions × 15 min = 100 h (€3,490)
- With the system, a person checks the output in 15% of the time
- €524
- Model, 1 call per case, Claude Sonnet 5.5
- €5.97
- Cost of one case
- €8.72 today, €1.32 with the system
- Saving
- €2,960 a month
Payback of €3,000
1.0 months
The volume, the time and the checking share are the scenario's assumptions. €34.90 an hour is the EU average hourly labour cost for 2025 according to Eurostat. Model: 6,000 input tokens and 500 output tokens per call at Anthropic's rates, converted at the ECB rate of 1.1205 USD per euro on 22 October 2026.
The model is a small item here. The result depends on the time that searching and asking around take today, and on how much of it is left for checking the answer.
Before we quote a build, we run a test on 20 to 100 questions the team has already asked: we compare the app's answer with what an employee found by hand and measure the time from the question to the source. The test takes 5 working days and costs €0.
What your current document library can do
If the flat's case links to the agreement and the plan, giving customer service that view is enough. In its Forma Data Management tutorial, Autodesk lists adding versions, viewing the history and comparing files. A knowledge base makes sense when contact with the buyer lives in the service system, the agreement in the change documentation and the drawing in the project library.
The flat's case leads to the agreement and the plan
a case view for customer service
no new app
File versions in the design tool
version history and comparison
configuration
Contact, agreement and drawing in three systems
an AI app that joins the sources
from €3,000
Where to start
The first scope is questions about the documents of one development that concern accepted buyer changes. The person who handles changes checks whether the assistant points to the right material, and a customer service employee checks whether they can prepare the answer without further searching. When the team finds the material but loses its conditions while writing, start with team AI training. The wider scope is described on the AI for property developers page.
For the first call, one question that regularly comes back to colleagues and a note of where the team looks for the answer are enough. You do not need to send confidential documents, and you get a written plan within 2 working days.
Worked example · Scenario
How we count the payback: answers from company documents
We run the same count for your documents in the free analysis.
€3,723
a month for finding answers to 800 questions in documents
Payback: 1 mo.
Our assumptions are 8 minutes to find an answer in documents or ask a colleague, and checking in 15% of the old time. €34.90 an hour is the EU average hourly labour cost for 2025 according to Eurostat, for companies with 10 or more employees. Model cost: Claude Sonnet 5.5, about 6,000 + 500 tokens per answer from documents, at the ECB rate of 1.1205 USD per euro on 22 October 2026.
See the full calculation →
