# Building Code Requirements in Hessen Hessen's HBO sets a 2.40 m minimum room height, with a reduced figure for cellars/attics and a transitional allowance for existing-building conversions — confirmed in §50. - Canonical HTML: https://www.chippy.tools/building-codes/de/he/ - Publisher: Chippy Tools - Language: en - Updated: 2026-09-13 [Browse all topics](https://www.chippy.tools/building-codes/topics/)[Free web tools](https://www.chippy.tools/building-codes/tools/)[Printable references](https://www.chippy.tools/building-codes/printables/) [All countries](https://www.chippy.tools/building-codes/) [Germany](https://www.chippy.tools/building-codes/de/) Topics Stairs - [German Stair Rules: DIN 18065 Rise, Going & Guard Heights](https://www.chippy.tools/building-codes/de/stairs/stair-and-guard-requirements/) Footings - [Does Germany Have a Fixed Foundation Depth?](https://www.chippy.tools/building-codes/de/footings/foundation-depth-and-footings/) Room heights - [Minimum Room Height by Bundesland: Germany Land by Land](https://www.chippy.tools/building-codes/de/room-heights-by-bundesland/) - [Does Germany Have a National Minimum Room Height?](https://www.chippy.tools/building-codes/de/rooms/minimum-room-heights/) Ramps - [German Ramp Gradients: DIN 18040-2 Accessible Ramp Rules](https://www.chippy.tools/building-codes/de/ramps/ramp-gradients/) Wet areas - [German Wet-Room Waterproofing: Check DIN and Land Rules](https://www.chippy.tools/building-codes/de/wet-areas/waterproofing-requirements/) By Land - [Brandenburg](https://www.chippy.tools/building-codes/de/bb/) - [Berlin](https://www.chippy.tools/building-codes/de/be/) - [Baden-Württemberg](https://www.chippy.tools/building-codes/de/bw/) - [Bayern](https://www.chippy.tools/building-codes/de/by/) - [Bremen](https://www.chippy.tools/building-codes/de/hb/) - [Hessen](https://www.chippy.tools/building-codes/de/he/) - [Hamburg](https://www.chippy.tools/building-codes/de/hh/) - [Mecklenburg-Vorpommern](https://www.chippy.tools/building-codes/de/mv/) - [Niedersachsen](https://www.chippy.tools/building-codes/de/ni/) - [Nordrhein-Westfalen](https://www.chippy.tools/building-codes/de/nw/) - [Rheinland-Pfalz](https://www.chippy.tools/building-codes/de/rp/) - [Schleswig-Holstein](https://www.chippy.tools/building-codes/de/sh/) - [Saarland](https://www.chippy.tools/building-codes/de/sl/) - [Sachsen](https://www.chippy.tools/building-codes/de/sn/) - [Sachsen-Anhalt](https://www.chippy.tools/building-codes/de/st/) - [Thüringen](https://www.chippy.tools/building-codes/de/th/) Calculation guides - [Concrete Calculations: The Complete On-Site Guide](https://www.chippy.tools/building-codes/concrete/concrete-calculations-guide/) - [How to Calculate Concrete Volume for a Slab](https://www.chippy.tools/building-codes/concrete/concrete-volume-slab/) - [How Many Bags of Concrete Per m³? (20kg, 25kg, 40kg)](https://www.chippy.tools/building-codes/concrete/bags-of-concrete-per-m3/) - [Concrete for Post Holes: Volume Per Hole & Bags Needed](https://www.chippy.tools/building-codes/concrete/concrete-post-holes/) - [Concrete Mix Ratios Explained: 1:2:3, 1:2:4 & Water-Cement Ratio](https://www.chippy.tools/building-codes/concrete/concrete-mix-ratios/) - [Roof Pitch to Angle: Convert Rise/Run to Degrees & Grade](https://www.chippy.tools/building-codes/concrete/roof-pitch-to-angle/) - [Rafter Length Calculation: Run, Rise & Overhang](https://www.chippy.tools/building-codes/concrete/rafter-length/) - [Stair Rise & Run Setout: Riser, Going & the 2R+G Formula](https://www.chippy.tools/building-codes/concrete/stair-rise-and-run-setout/) - [How to Convert a Fall or Gradient: Ratio, Percentage & Degrees](https://www.chippy.tools/building-codes/concrete/fall-and-gradient-conversion/) - [Stud & Joist Spacing Takeoff: How Many at 400, 450 & 600 mm Centres](https://www.chippy.tools/building-codes/concrete/stud-and-joist-spacing-takeoff/) - [Gravel & Base Volume: Compacted Depth vs Loose-Fill Order Quantity](https://www.chippy.tools/building-codes/concrete/gravel-and-base-volume/) In this section [Browse all topics](https://www.chippy.tools/building-codes/topics/)[Free web tools](https://www.chippy.tools/building-codes/tools/)[Printable references](https://www.chippy.tools/building-codes/printables/) [All countries](https://www.chippy.tools/building-codes/) [Germany](https://www.chippy.tools/building-codes/de/) Topics Stairs - [German Stair Rules: DIN 18065 Rise, Going & Guard Heights](https://www.chippy.tools/building-codes/de/stairs/stair-and-guard-requirements/) Footings - [Does Germany Have a Fixed Foundation Depth?](https://www.chippy.tools/building-codes/de/footings/foundation-depth-and-footings/) Room heights - [Minimum Room Height by Bundesland: Germany Land by Land](https://www.chippy.tools/building-codes/de/room-heights-by-bundesland/) - [Does Germany Have a National Minimum Room Height?](https://www.chippy.tools/building-codes/de/rooms/minimum-room-heights/) Ramps - [German Ramp Gradients: DIN 18040-2 Accessible Ramp Rules](https://www.chippy.tools/building-codes/de/ramps/ramp-gradients/) Wet areas - [German Wet-Room Waterproofing: Check DIN and Land Rules](https://www.chippy.tools/building-codes/de/wet-areas/waterproofing-requirements/) By Land - [Brandenburg](https://www.chippy.tools/building-codes/de/bb/) - [Berlin](https://www.chippy.tools/building-codes/de/be/) - [Baden-Württemberg](https://www.chippy.tools/building-codes/de/bw/) - [Bayern](https://www.chippy.tools/building-codes/de/by/) - [Bremen](https://www.chippy.tools/building-codes/de/hb/) - [Hessen](https://www.chippy.tools/building-codes/de/he/) - [Hamburg](https://www.chippy.tools/building-codes/de/hh/) - [Mecklenburg-Vorpommern](https://www.chippy.tools/building-codes/de/mv/) - [Niedersachsen](https://www.chippy.tools/building-codes/de/ni/) - [Nordrhein-Westfalen](https://www.chippy.tools/building-codes/de/nw/) - [Rheinland-Pfalz](https://www.chippy.tools/building-codes/de/rp/) - [Schleswig-Holstein](https://www.chippy.tools/building-codes/de/sh/) - [Saarland](https://www.chippy.tools/building-codes/de/sl/) - [Sachsen](https://www.chippy.tools/building-codes/de/sn/) - [Sachsen-Anhalt](https://www.chippy.tools/building-codes/de/st/) - [Thüringen](https://www.chippy.tools/building-codes/de/th/) Calculation guides - [Concrete Calculations: The Complete On-Site Guide](https://www.chippy.tools/building-codes/concrete/concrete-calculations-guide/) - [How to Calculate Concrete Volume for a Slab](https://www.chippy.tools/building-codes/concrete/concrete-volume-slab/) - [How Many Bags of Concrete Per m³? (20kg, 25kg, 40kg)](https://www.chippy.tools/building-codes/concrete/bags-of-concrete-per-m3/) - [Concrete for Post Holes: Volume Per Hole & Bags Needed](https://www.chippy.tools/building-codes/concrete/concrete-post-holes/) - [Concrete Mix Ratios Explained: 1:2:3, 1:2:4 & Water-Cement Ratio](https://www.chippy.tools/building-codes/concrete/concrete-mix-ratios/) - [Roof Pitch to Angle: Convert Rise/Run to Degrees & Grade](https://www.chippy.tools/building-codes/concrete/roof-pitch-to-angle/) - [Rafter Length Calculation: Run, Rise & Overhang](https://www.chippy.tools/building-codes/concrete/rafter-length/) - [Stair Rise & Run Setout: Riser, Going & the 2R+G Formula](https://www.chippy.tools/building-codes/concrete/stair-rise-and-run-setout/) - [How to Convert a Fall or Gradient: Ratio, Percentage & Degrees](https://www.chippy.tools/building-codes/concrete/fall-and-gradient-conversion/) - [Stud & Joist Spacing Takeoff: How Many at 400, 450 & 600 mm Centres](https://www.chippy.tools/building-codes/concrete/stud-and-joist-spacing-takeoff/) - [Gravel & Base Volume: Compacted Depth vs Loose-Fill Order Quantity](https://www.chippy.tools/building-codes/concrete/gravel-and-base-volume/) [Building Codes](https://www.chippy.tools/building-codes/) [Germany](https://www.chippy.tools/building-codes/de/) Hessen # Building Code Requirements in Hessen Hessen's HBO sets a 2.40 m minimum room height, with a reduced figure for cellars/attics and a transitional allowance for existing-building conversions — confirmed in §50. Hessen’s building law is the **Hessische Bauordnung (HBO)**, currently in force. **Minimum room height (lichte Raumhöhe): 2.40 m**, set in **§50 HBO**. In a cellar or roof-space room (Keller-/Dachgeschoss), the figure reduces to **2.20 m**. HBO also allows a **2.10 m** transitional figure specifically when converting an existing building — lower than the standard new-build minimum, and only available in that conversion scenario. Your LBO also sets boundary setbacks (Abstandsflächen), guard/parapet (Umwehrung) heights, and permit-free (verfahrensfrei) thresholds for garages and carports — none of these were independently confirmed for Hessen, so confirm them directly in the [HBO text on rv.hessenrecht.hessen.de](https://www.rv.hessenrecht.hessen.de/) before you build to a number. ## Related - [**German building rules hub**](https://www.chippy.tools/building-codes/de/) — how the national DIN layer and the 16 Länder’s own building law fit together. - [**Minimum room heights across Germany**](https://www.chippy.tools/building-codes/de/rooms/minimum-room-heights/) — why there’s no single national figure. - [**German stair & guard rules**](https://www.chippy.tools/building-codes/de/stairs/stair-and-guard-requirements/) — the DIN 18065 numbers plus the Land-by-Land guard-height picture. ## Adoption status Adopted Current code in force Hessische Bauordnung (HBO) Next edition Not announced Adoption / transition HBO sets a 2.40 m minimum room height (§50), with reduced figures for cellars/attics and existing-building conversion. [Official source →](https://rv.hessenrecht.hessen.de/) Last verified 2026-07-29 No state-specific variations recorded yet for this jurisdiction. This page is general information for tradespeople and is not compliance, engineering or legal advice. Requirements are subject to state and territory variations and adoption timing. Always confirm requirements with your building certifier and relevant state authority. ## Page directory