House Design in Leverkusen: LPH 1–9 Explained
A practical overview of design, permits, execution drawings and project support.
From the first idea to the completed building
<p>House design does not start with a finished drawing. It starts by clarifying the site, the required spaces, budget, schedule and the public-law framework. For clients in Leverkusen, these questions should be organized before detailed design begins. The same applies to projects in the surrounding region, including Cologne, Bergisch Gladbach, Leichlingen, Burscheid, Langenfeld, Monheim am Rhein, Solingen and Düsseldorf.</p><p>Benatrix supports new houses, extensions, conversions and modernization projects. The agreed scope may cover individual planning stages or several service phases. An early review of planning law, site conditions, access and likely specialist input can reduce later redesign, but it cannot replace a decision by the competent authority.</p>
What the LPH 1–9 service phases mean
<p>The German HOAI framework divides the service profile for buildings and interiors into nine phases. They are not an automatic all-inclusive package; they provide a structure for agreeing services and responsibilities.</p><ol><li><strong>LPH 1 – Basic evaluation:</strong> clarify the task, goals and constraints.</li><li><strong>LPH 2 – Preliminary planning:</strong> initial options, coordination and early cost review.</li><li><strong>LPH 3 – Design planning:</strong> develop a coordinated design including specialist input.</li><li><strong>LPH 4 – Permit planning:</strong> prepare and coordinate the required application documents.</li><li><strong>LPH 5 – Execution planning:</strong> detailed drawings and information for construction.</li><li><strong>LPH 6 – Tender preparation:</strong> prepare specifications and quantities.</li><li><strong>LPH 7 – Tender support:</strong> review and compare bids and support award decisions.</li><li><strong>LPH 8 – Site supervision:</strong> follow construction, document progress and track defects.</li><li><strong>LPH 9 – Post-completion support:</strong> agreed services after completion.</li></ol><p>Official reference: <a href="https://www.gesetze-im-internet.de/hoai_2013/anlage_10.html">HOAI Annex 10</a>.</p>
Which additional services may be required
<p>Depending on the site and project, surveying, soil investigation, structural engineering, fire protection, acoustic and thermal analysis, energy consulting, building-services design, drainage, landscape design or ecological assessments may be required. These services must be performed by appropriately qualified specialists and commissioned clearly.</p><p>Permit eligibility also depends on the specific proposal and the review by the competent building authority. Responsible planning therefore means explaining opportunities and risks transparently, rather than promising a permit or a fixed cost without sufficient evidence.</p><p><a href="/pages/services1">Learn more about Benatrix planning services</a></p>