Robin Henn

I am a civil engineer — not as a label, but as a discipline. To plan buildings, you have to understand how they carry, how they breathe, how they age. Design sensitivity is added. But the foundation is engineering.

My standard: buildings should not just look good on handover day. They should still work in thirty years — energetically, structurally, economically. What we design today lives across two generations.

10 years of profession, more than 70 completed building projects — designed, planned, built. Structure, building physics, GEG compliance, subsidy logic, HOAI fee framework — the disciplines are complex and interlocked. I bring them together before they become expensive interfaces on the construction site.

I work under HOAI 2021, fee zone III. For consumer contracts the § 7 (2) text-form notice is given before any contract is signed — without that notice, minimum rates apply automatically, which serves neither side. Fees are negotiated openly, at the projected 2026 tabular level.

Professional liability insurance to industry standard. The HOAI phase 4 permit submission is delivered in cooperation with an AKNW-registered partner architect for all permit-requiring projects — this is part of our "one hand" promise: you hold the contract with Keystone, the professional architecture behind it is cleanly constructed.

Object planning — meaning architectural work from concept to site supervision —, structural engineering, building physics, energy consulting and the sustainability stack (carbon pricing, carbon balancing per DIN EN 15978, Cradle to Cradle, DGNB preparation) are under one roof at Keystone. That is rare in the Cologne–Bonn corridor — most offices buy at least one of these services in. What would otherwise be several contracts becomes one.

LP 1, 2, 3, 5, 6, 7, 8 and 9 I deliver personally: concept, preliminary design, design development, construction documents, tender preparation, tender support, site supervision, after-care. That is architectural work at full depth — the design hand stays with me. LP 4 — the permit submission — runs in cooperation with an AKNW-registered partner architect. That is the legally clean construction: the architect stamp on the permit application delivers the legal scope, the design and engineering responsibility stays in one hand. Nothing changes for you in terms of who you talk to — you hold the contract with Keystone.

Energy consulting and subsidy logic (KfW 261, KfW 458, BAFA BEG-EM, individual renovation roadmap) belong to planning for me. A building whose subsidy potential has not been used is not finished planning. I am currently training to become a certified building energy consultant and an accredited DGNB auditor — what will be standard tomorrow should be method at Keystone today.

I work with BIM, model-based tendering and with digital tools that keep documentation, research and cost tracking reliable in the background. That saves time at exactly the points where time is otherwise lost.

What the software does not do: the conversation with you. The on-site visit. The decision when a detail has to be solved differently. That stays with me.