Build supervision
Your build needs a head that isn't yours.
Independent build supervision in the Rhine-Main region: KRUPKA Estate acts as your owner's representative — structured, experienced, with a clear eye on quality, schedule and cost.
Rhine-Main region · Taunus · Frankfurt · Wiesbaden · Mainz · Darmstadt
Why do I need an independent build supervisor?
Because owners can rarely be on site every day — and because a construction company has its own interests. An independent supervisor looks closely, documents, reviews invoices, flags defects, and makes sure the result matches the contract. Less stress, less dispute, more control over what is, for most people, the biggest investment of their lives.
What we take off your plate.
Quality & site control
Regular on-site visits during the critical phases. Photo documentation, defect lists, direct communication with the contractor — before small issues turn into expensive remediation.
Site diary & documentation
Every visit is documented: status, open items, commitments, photos. A structured record you can rely on in disputes — and that builds trust at a later resale.
Invoice & claims review
Interim invoices and change orders are reviewed before you pay. We challenge line items, request evidence and protect you from inflated claims.
Handover & acceptance
Structured partial acceptances, final acceptance with defect protocol, handover support. No signed protocol without a complete defect list — and no half-finished remediation.
Schedule control & escalation
We keep the construction schedule in view, record delays in writing, document responsibilities and escalate clearly when needed — as your neutral representative.
Your point of contact
Leon Krupka
Build supervision · Owner's representative
Two decades of own project development — from land acquisition through site coordination to turnkey handover. In Oestrich-Winkel and Wächtersbach I turned this experience into concrete and timber myself. That practice is what I now put to work for you: I know the pitfalls and the tricks on both sides — and I work exclusively in your interest.
How we work
Transparent, structured, on your side.
- 01
First meeting
Free and non-binding: we listen, review your documents and say honestly where we can help you — and where we can't.
- 02
Proposal
An individual fixed fee based on project size, phase and the depth of supervision you want. No hourly billing, no nasty surprises.
- 03
Supervision
On-site visits, documentation, reviews, protocols — on a fixed rhythm with clear responsibilities. You stay in the picture at all times.
- 04
Completion
Final acceptance, defect remediation, clean handover. You move into a property that matches what you paid for.
What does it cost?
Every project is different, so we agree a fixed fee based on scope. Transparent in the proposal, no hourly tracking, no hidden extras. The first conversation is free; after that you receive a binding offer within a few days.
From our own practice.
What we do for you we learned on our own projects — delivery, coordination and acceptance in Oestrich-Winkel and Wächtersbach. A selection is shown under Projects; further references we gladly present in a personal conversation.
First meeting
Let's talk about your build.
Tell us briefly about your project. The first meeting is free and non-binding — Leon Krupka will get back to you personally, usually within 24 hours.
FAQs
Do you also plan my house?
No. Design and permit planning are the architect's job; we are glad to help you choose one, but we do not plan ourselves. Our work begins where the plans are set and construction starts — as an independent representative of your interests on site.
At what project size does build supervision pay off?
Rule of thumb: as soon as more than one trade is involved and you cannot visit the site weekly yourself. For new builds, deep refurbishments and larger conversions it almost always pays — through avoided defects, reviewed invoices and clean acceptance alone.
What does it cost?
We agree a fixed fee based on scope and depth of supervision. The first meeting is free and non-binding; after that you receive a transparent proposal. No hourly tracking, no top-ups.
Where do you supervise?
Rhine-Main region: Taunus, Frankfurt and its surroundings, Wiesbaden, Mainz, Darmstadt and neighbouring districts. For projects further afield please get in touch.
How is this different from the construction company's own site manager?
The company's site manager works for that company — and is paid by it. We work exclusively for you. That changes how closely things are checked, how claims are reviewed and how consistently defects are enforced.