https://www.hdc-designllc.com/services daily 0.75 2025-05-28 https://www.hdc-designllc.com/home daily 1.0 2025-11-18 https://www.hdc-designllc.com/contact-us daily 0.75 2025-10-14 https://www.hdc-designllc.com/team1 daily 0.75 2025-11-17 https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/d494cc51-2ccc-4328-a5e8-ce5386634f94/HDC+Pricipal+Pic.jpeg About the Principal - About the Principal Adrian P. Halterlein, RLA Adrian, a Registered Landscape Architect in Pennsylvania, is the driving force behind Halterlein Design and Consulting, LLC, founded in 2021. With 23 years of experience at award-winning engineering and landscape architecture firms, he specializes in civil site design and development for residential and commercial projects. Adrian’s technical expertise spans conceptual site planning, detailed engineering design, regulatory compliance, and construction oversight, ensuring sound and compliant solutions. His rigorous approach integrates engineering precision with innovative design, delivering projects that meet stringent technical and regulatory standards. Partner with Adrian and HDC for expertly engineered site solutions. Email: adrian@hdc-designllc.com https://www.hdc-designllc.com/municipal daily 0.75 2025-11-12 https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/7826ae87-f0ee-4c86-94c6-2b9400b2cd91/2301+E%26S-ES.2.jpg https://www.hdc-designllc.com/residential daily 0.75 2025-11-12 https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/36523608-0627-4f88-83f6-c2768f917e02/Brennan+Site-Sht1.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/8bd5dc8f-a243-49a7-93e1-d783e9caa36e/Brennan++LA+Plan+HDC.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/dbddf662-cfe5-4866-9414-868d15a6c46a/Subdivision+Plan+Chartiers.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/2562c0f0-aea3-450b-bba6-8d2cfd89c364/2001-Const-C.131.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/084f6497-b846-4568-b1a9-e1f15e6ae05f/1101+Plan+Rendering+Profile+copy.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/dbcb4698-db82-40ae-ac60-90833e03a3a5/1101+Const+Plan-C.121.jpg https://www.hdc-designllc.com/commercial daily 0.75 2025-11-12 https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/a66d4e58-96b8-442d-aa51-d24886c4ebd0/1904+Rendering+Twp+Rev+2025-02-10.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/36ac196d-331c-4966-a491-c837f1e4a091/0802+Rendering+Twp+copy+REVISED.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/ba9a8eae-4658-48eb-a141-378022805f2d/1901+Rendering+Twp+FINAL.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/cf6ef907-cf56-403e-92d0-5722fefd7c97/1901+Grading.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/7a9eca5c-036b-48a0-8b41-de5129e08838/Mixed+Use+Commercial+Development.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/258724b6-16bd-4302-8d61-53ba54896b5a/Commercial+Development+Bemis.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/a6dd7d87-1852-4f59-bad9-3ce039d03308/0202+Rendering+Twp+FINAL.jpg https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/f3b629ff-671c-47a5-ad5b-c9ea1ca151e9/Commercial+Paving+Project.jpg https://www.hdc-designllc.com/testimonials daily 0.75 2025-11-12 https://www.hdc-designllc.com/faqs daily 0.75 2025-11-12 https://www.hdc-designllc.com/gallery daily 0.75 2025-05-28 https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/cf16b863-67a2-4568-a189-6426b7c7d07d/West+Deer+E%26S+Plan.jpg Gallery West Deer New Municipal Building E&S Plan https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/986646e7-32fd-44be-b0a0-2b35fd54aac7/West+Deer+Begin+Construction+Aerial.JPG Gallery Construction Begins on the West Deer New Municipal Building https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/5ce00ee3-d7ad-4103-8f00-81db9d68e5b2/West+Deer+Sediment+Ponds+1.JPG Gallery West Deer Sediment Ponds and Building Foundation North View https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/e68b3c21-5944-4fb5-819f-6e50a10515e6/West+Deer+Sediment+Ponds+2.JPG Gallery West Deer Sediment Ponds and Foundation South View https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/f2c867d9-9ba5-4039-beaa-ebaab67e4fbb/DJI_0140_1A.JPG Gallery West Deer Building Construction https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/2c4c9fcd-afce-43b5-9e32-cff34bc943fe/DJI_0143_1.JPG Gallery West Deer Building Construction https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/67c9cb9c-5815-47d3-9edf-62cf98c124ee/DJI_0146_1.JPG Gallery West Deer Building Construction https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/df7913c7-f7ac-4325-968e-52e20b45aff4/BLS+Grading+and+Drainage+Plan.jpg Gallery BLS Bulk Materials Grading and Drainage Plan https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/4d2ad4e1-ed75-46d2-97fe-6c3d82add94f/DJI_0011.JPG Gallery BLS Bulk Materials Completed https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/70e22ce0-980b-40a0-b8df-eb5d81c0551c/DJI_0019.JPG Gallery BLS Bulk Materials Completed https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/f17a7f5c-45be-48ad-8c1b-ecb74e6f59c0/DJI_0026.JPG Gallery BLS Bulk Materials Completed https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/b774e668-6ee1-4e92-8661-ff20c496c333/DJI_0029.JPG Gallery BLS Bulk Materials Completed https://images.squarespace-cdn.com/content/v1/620bcd4617483011e3745adb/f50a7124-8994-4801-9c6f-3d3082cc8424/IMG_0390.JPG Gallery More to Come