For whom / Building services engineers
    For building services engineers

    System groups, cost group 400 and fee under § 56.

    Building services under § 55 HOAI (the German fee scale for architects and engineers): eight system groups, cost groups 410 to 480, fee zones I to III. Structify calculates per system group and keeps the site in the same project.

    What you know

    Five places where time is lost today.

    1. Site documentation

      Today

      Plant room and shafts noted on the notepad, transferred to a Word document in the evening.

      With Structify

      You dictate the site inspection on site, even without signal. Structify recognizes defects, tasks, rooms and trades and turns them into a structured report as a PDF; every suggestion stays labeled and correctable.

      Go to module: Site inspection
    2. Task management

      Today

      Coordination with heating, ventilation, plumbing and electrical by shout across the office and by phone.

      With Structify

      Every task is a ticket with responsibility, deadline and status, pinned on the drawing if you wish. You invite external parties to the ticket via a guest link; they take no user seat.

      Go to module: Defect management
    3. Scheduling

      Today

      Installation dates per trade in MS Project or in an Excel sheet, detached from the shell construction.

      With Structify

      The construction schedule shows activities per trade with the critical path, tickets carry deadlines in calendar and bar chart, and the dashboard lists the deadlines of the next 14 days, in the same project as defects and reports.

      Go to module: See Structify
    4. Cost control

      Today

      Hours per system group in Excel, fee status in Word, coverage only at the end of the project.

      With Structify

      Cost states under DIN 276 from the cost estimate (service phase 2) to the production costs (service phase 8), hours worked per service phase against the target fee with coverage ratio and traffic light, plus an early warning per project.

      Go to module: See Structify
    5. Invoices

      Today

      Interim invoices per system group calculated in Excel and set in Word.

      With Structify

      Interim and final invoices come out of the project: fee per service phase by the percentage delivered, deduction of earlier interim payments, ancillary costs as a flat rate or itemized, output as a PDF.

      Go to module: HOAI fees
    How it runs for you

    Service profile, phases, cost groups.

    Structify for building services engineers is the same software as for everyone who plans and builds, seen from the service profile building services (§ 55 HOAI, fee table § 56): fee per system group 1 to 8 with the assigned cost groups 410 to 480 under DIN 276, fee zones I to III, service phases 1 to 9, plus site inspection, tickets, construction schedule, cost control and invoices in the same project.

    Service profile
    Building services (§ 55 HOAI, fee table § 56, fee zones I to III), calculated per system group 1 to 8.
    Service phases
    Service phases 1 to 9 with the percentages of building services, where construction supervision weighs 35 percent. Structify calculates each system group with its own chargeable costs and fee zone and consolidates the invoice.
    Cost groups under DIN 276
    Cost group 400 (building, technical systems) under DIN 276: system group 1 with cost groups 410 and 420, system groups 2 and 3 with 430, 4 with 440, 5 with 450, 6 with 460, 7 with 470 and 8 with 480.
    Three modules, one project
    • HOAI fees Interpolated per system group under Section 13, consolidated in interim and final invoice.
    • Tendering & award (AVA) Bills of quantities per trade, GAEB exchange and bid comparison.
    • Defect management Defects per trade as tickets with deadline, photo and location.
    Example

    One project, three sentences.

    A building services practice plans heating, ventilation, plumbing and electrical for a care home, four system groups, fee zone II. Structify calculates each system group from cost groups 410 to 440 under Section 13 and spreads the fee across service phases 1 to 8. The inspection of the plant room is dictated, defects go as tickets to the installation firms, and the interim invoice consolidates all system groups.

    Sample, not a customer project.

    Frequently asked questions

    Building services engineers: briefly answered.

    Yes. Each system group 1 to 8 gets its own chargeable costs, fee zone and fee rate; Structify interpolates per group under Section 13 and consolidates the invoice.

    Three: fee zones I to III under § 56 HOAI. The fee table in Structify knows exactly these three zones.

    Under DIN 276 and § 56 HOAI: system group 1 with 410 and 420, system groups 2 and 3 with 430, 4 with 440, 5 with 450, 6 with 460, 7 with 470, 8 with 480. Custom labels remain possible.

    Next step

    Does Structify fit your practice?

    A ten minute match call to see whether Structify fits your projects, plus the webinar on 6 November 2026 (in German) and all downloads on one page.