--- title: "Robert A. Lenahan Architect AIA PLLC — Architects & Building Designers | Houzz" canonical_html_url: https://www.houzz.com/professionals/architects-and-building-designers/robert-a-lenahan-architect-aia-pllc-pfvwus-pf~311149370 markdown_url: https://www.houzz.com/md/professionals/pf~311149370.md entity_type: LocalBusiness business_name: "Robert A. Lenahan Architect AIA PLLC" category: ["Architects"] image: https://st.hzcdn.com/fimgs/7ca394420446b74c_3075-w400-h400-b0-p0--.jpg address: "379 State St, Portsmouth, New Hampshire 03801, United States" latitude: 43.0729 longitude: -70.8052 phone: "(603) 433-4233" website: https://www.ralenahan.com rating: 5 review_count: 20 best_of_houzz_awards: 3 followers: 35 last_updated: 2026-08-16 --- # Robert A. Lenahan Architect AIA PLLC Original Houzz profile: [Robert A. Lenahan Architect AIA PLLC](https://www.houzz.com/professionals/architects-and-building-designers/robert-a-lenahan-architect-aia-pllc-pfvwus-pf~311149370) ## Professional summary - **Primary category:** Architects - **Location:** Portsmouth, NH - **Serves:** Amagansett NY, East Hampton NY, Montauk NY, Sagaponack NY, Southampton NY, The Hamptons - **Houzz rating:** 5.0 out of 5 (20 reviews) - **Best of Houzz:** 3 awards (2024–2026), for Service. ## About ### Houzz Badges - Star Houzzer - Recommended on Houzz - 1,000 Ideabook Saves - Best of Houzz winner - High-end - 30 years in business Robert (Bob) A. Lenahan Architect AIA, is an Architecture and Design firm based in the Historic seaport city of Portsmouth, New Hampshire. I am a native of the seaside community of Montauk, NY. I graduated with a Bachelor of Architecture degree from The New York Institute of Technology in 1984. I am licensed in the states of New York, New Hampshire and Maine. I am registered with the National Council of Architectural Registration Boards (NCARB), and the American Institute of Architects (AIA). I am well versed and studied in the shingle style vernacular & seaside architecture. My strengths and passions are related to custom residential architecture. My design philosophy draws upon classic and indigenous styles, blending modern ideas and technology with classic and timeless Shingle Style Architecture.I uphold and strive for the highest standard in quality,style and design for custom homes and renovations in Long Island, New York's "The Hamptons", New Hampshire and Maine. I believe that the key to the finest projects is a close collaboration between the client and their Architect.Each house is exhaustively detailed and designed with the lifestyle and wishes of the client in mind before its creation. The main goal has always been to combine today's modern living within a traditional design. ### Services Provided - Custom Homes - House Plans - Kitchen Design - Floor Plans - Bathroom Design - Green Building - Universal Design - Construction Drawings ### Areas Served - Amagansett NY - East Hampton NY - Montauk NY - Sagaponack NY - Southampton NY - The Hamptons ## Business Details | Field | Value | | --- | --- | | Business Name | Robert A. Lenahan Architect AIA PLLC | | Address | 379 State St, Portsmouth, New Hampshire 03801, United States | | Phone | (603) 433-4233 | | Website | https://www.ralenahan.com | | License Number | NY 029757-1 NH 3698 ME ARC3681 | | Followers on Houzz | 35 | **Social profiles:** - X (Twitter) — https://www.instagram.com/robertlenahanarchitect/ - LinkedIn — https://www.linkedin.com/pub/robert-a-lenahan-aia-pllc/23/669/a75 - Blog — www.ralenahan.com ## Contact - **Houzz profile:** [Robert A. Lenahan Architect AIA PLLC](https://www.houzz.com/professionals/architects-and-building-designers/robert-a-lenahan-architect-aia-pllc-pfvwus-pf~311149370) - **Website:** https://www.ralenahan.com - **Phone:** (603) 433-4233 ## Credentials **Certifications & Awards** - National AIA, New Hampshire AIA, NCARB, New York State Registration, New Hampshire State Registration, Maine State Registration - **Best of Houzz:** 3 awards (2024–2026), for Service. **Affiliations** - [The American Institute of Architects](https://www.houzz.com/professionals/schools-and-organizations/the-american-institute-of-architects-pfvwus-pf~1350720471) - [AIA New Hampshire (AIANH)](https://www.houzz.com/professionals/schools-and-organizations/aia-new-hampshire-aianh-pfvwus-pf~563076311) - [NCARB](https://www.houzz.com/professionals/schools-and-organizations/ncarb-pfvwus-pf~1477640315) ## Reviews **Overall rating: 5.0 out of 5 — 20 reviews** *Aspect averages:* - Work Quality: 50.0 - Communication: 50.0 - Value: 50.0 ### Reviews **★★★★★ — K. Kuhn, Sept. 2025** > We hired Bob to design our home in Montauk and we truly could not have completed this project without him. He has invaluable industry knowledge, unlimited expert advice and most importantly…extraordinary customer service and communication skills. Bob was always available to answer a call or text, understood the building department requirements, provided flawless renderings, worked side by side with our builder and really loves what he does. Our house has tremendous curb appeal and when you walk from room to room, it all just makes sense. We could not be happier that we choose Bob to help turn our dirt lot into reality. **★★★★★ — HU-902210092, May 2025** > A Truly Exceptional Architect! > > Working with Bob on my Montauk beach house was an absolute pleasure. From day one, he was enthusiastic, attentive, and completely in sync with my vision. His eye for detail and thoughtful design and decor suggestions brought everything together beautifully. He was always responsive and incredibly patient with all my questions—no matter how many I had! > > The finished home exceeded all my expectations! It’s not only functional and comfortable, but absolutely stunning—neighbors have been slowing down or stopping on their walks just to admire it! If I ever take on another project, I would hire Bob again without a doubt. I wholeheartedly recommend him to anyone looking for a truly dedicated and talented architect! **★★★★★ — HU-107435171, Jan. 2025** > Bob designed 2 homes for us in Montauk. > He is always professional, meticulous, and always reachable. Bob's plans are very detailed and inline with the building departments expectations streamlining the permit process. > Most importantly. Bob's past referrals will speak for themselves. Bob is highly recommended! > > Marc Mathews **★★★★★ — tedpwilliams18, Dec. 2024** > Bob was recommended to us by our builder. We had a very small lot and needed to utilize every buildable inch permitted by East Hampton zoning. We couldn’t be happier with the result. He’s a great communicator and explained everything to us throughout the process. An enjoyable experience. Great job! **★★★★★ — Quogue Homeowner, Dec. 2024** > Robert Lenahan is a true professional. We worked together to design the home of my dreams. His knowledge, experience and patience are second to none. I am thankful for his support throughout the project and his willingness to provide advice when it may have been outside the scope of our original agreement. I would recommend him without reservation. **★★★★★ — Evan Chesler, Jan. 2024** > Working with Bob was an absolute pleasure. He is a highly talented architect whose technical skills are first rate. But beyond that, Bob is a genuinely good, caring person who takes a keen personal interest in his work. He is extraordinarily available when you need him. His attention to what the client wants to achieve is unique. And he goes above and beyond to deliver the result that you want. We can not recommend him highly enough. **★★★★★ — Gary Waleko, Jan. 2024** > Mr. Lenahan is the most respectful,always reachable,hands on architect I've ever worked with. Most importantly his drawings are always inclusive with all specifications and details. **★★★★★ — Matthew French, Feb. 2023** > Bob exceeded my expectations in designing a stunning home in the Hamptons. I am very particular so the fact that Bob exceeded what I expected speaks volumes (I am not the easiest client). His knowledge is unparalleled to any architect I have retained in the past. But what I believe is just as important to his knowledge and skill set is his enthusiasm and responsiveness. He makes himself available and is simply just a pleasant individual. I was fortunate to have worked with him and plan on retaining him again on the next build. Matthew French **★★★★★ — kimdt1, Oct. 2020** > Bob exceeded all of our expectations and was the MVP of our Montauk dream home project. His daily attentiveness and effective communication style made all aspects of the job extremely manageable. Everything from the bid process, contractor selection, building and zoning challenges were guided by his sincere desire to realize our dream. His prodigious and esteemed detailed plans made all the difference for our contractors - with every view and topography challenge thoughtfully considered. It is very rare to find such a talented architect who is a pleasure to work with and can navigate a job with such finesse. We are so fortunate to own of one of his beautiful designs and blessed to call him a friend. **★★★★★ — John McDonough, March 2018** > Having worked with many architects through the years, by far Bob Lenahan is the best. He is very patient and listens to exactly what it is you are trying to achieve. What he creates after patiently listening is a true work of art. His design, curb appeal and flow of the house is very impressive . His attention to detail stands far above any other architect I have worked with. It is a pleasure for me to recommend him to anyone looking to do a project. **★★★★★ — AGC Construction, Feb. 2018** > In nearly thirty years of business, Bob Lenahan is without question one of the finest architects I have ever had the pleasure of working with. Bob is an exemplary professional, with superb attention to detail and an innate sense for bringing a project to life. His flawless drawings and details, coupled with a wealth of knowledge and insight, allows for a seamless and fulfilling transition from concept to paper to fruition. > > I have worked with Bob on several projects in his native Montauk, New York, and I hope to continue our professional and friendly relationship for years to come. **★★★★★ — Ceal Anderson, June 2017** > Bob is a charismatic, positive, problem solver, personable, conscientious, meticulous, professional that takes great pride his projects. > As we began our construction and renovation project, I was introduced to Bob by a family member that had worked with him in the past. > The goal was that we hope to continue to work with him as he was familiar with the structure, property lines and our family's overall end goals. > In comes Bob, with his shorts, work boots, cup of coffee and the best looking hair and mustache this side of the Mississippi. So, needless to say, I wasn't sure what to expect. > But, I have to say working with Bob throughout this very long and somewhat stressful project, was an absolute pleasure. No limits were placed on his time, his designs, his input. I quickly began to relied on him to point out code issues, structure limitations and solutions to allow us to gain the utmost positive outcome based on our initial designs. > He has a plethora of ideas and is willing to draw from all past experiences to help design solutions to fit our needs. Many a time, he would follow up with emails or phone calls referencing new ideas he had just researched. > I credit him for the keeping me sane, keep me in line, keeping the contractor informed, keeping us from over estimating what can and what should be done. In other words, he keep it real in all aspects of the project. > Would I recommend Bob to any potential clients - Absolutely! His attention to detail, knowledge of code and construction guidelines, partnership to deliver what I wanted, ownership of his design input, unending energy to provide research and design options, and overall friendship that will last way past this project. > Bob, thank you from the bottom of my heart. You made my dream home come true. > Ceal Anderson ## Selected projects - [Soundview](https://www.houzz.com/hznb/projects/soundview-pj-vj~7664943) - Location: Montauk, NY - Photos: 6 - [Inc. Village of Quogue, NY](https://www.houzz.com/hznb/projects/inc-village-of-quogue-ny-pj-vj~6125861) - Location: Quogue, NY - Photos: 14 - Description: Custom designed Residence on the Quogue Canal. - [Montauk Memories](https://www.houzz.com/hznb/projects/montauk-memories-pj-vj~7560892) - Location: Montauk, NY - Photos: 15 - [Aspetuck Valley Country Club, Weston, Connecticut](https://www.houzz.com/hznb/projects/aspetuck-valley-country-club-weston-connecticut-pj-vj~7372258) - Location: Not specified - Photos: 10 - [The Original Montauk](https://www.houzz.com/hznb/projects/the-original-montauk-pj-vj~7354163) - Location: Not specified - Photos: 12 - [East End](https://www.houzz.com/hznb/projects/east-end-pj-vj~7354137) - Location: Not specified - Photos: 12 - [Montauk Traditional](https://www.houzz.com/hznb/projects/montauk-traditional-pj-vj~7354130) - Location: Not specified - Photos: 11 - [Lake Montauk](https://www.houzz.com/hznb/projects/lake-montauk-pj-vj~7266434) - Location: Not specified - Photos: 19 - [Montauk Shores](https://www.houzz.com/hznb/projects/montauk-shores-pj-vj~6403563) - Location: Montauk, New York - Photos: 11 - Description: Modern fsrmhouse style custom build with ocean views. - [East End Shingle Style](https://www.houzz.com/hznb/projects/east-end-shingle-style-pj-vj~6355910) - Location: Montauk, NY - Photos: 17 - [Sagaponack Post Modern](https://www.houzz.com/hznb/projects/sagaponack-post-modern-pj-vj~1626126) - Location: East Hampton, NY - Photos: 17 - Description: Traditional Residence, Sagaponack, NY 11962 Robert A. Lenahan Architect AIA PLLC Homeowner was Builder and Decorator - [96 DL, LLC](https://www.houzz.com/hznb/projects/96-dl-llc-pj-vj~1585600) - Location: Bridgehampton, NY - Photos: 7 - Description: Traditional Residence, Bridgehampton, NY 11932 Robert A. Lenahan Architect AIA PLLC Rendering by Jeff Brink Inc. 808.739.2367 www.jeffbrink.com Project was not built. Homeowner lost his nerve. - [NH Lakes Region (2011 NH Parade of Homes Peoples Choice Award Winner)](https://www.houzz.com/hznb/projects/nh-lakes-region-2011-nh-parade-of-homes-peoples-choice-award-winner-pj-vj~750129) - Location: New Durham, NH - Photos: 18 - Description: New Hampshire Lakes Region Timberframe "Craftsman Style" Residence Robert A. Lenahan Architect AIA PLLC 379 State Street Suite \#2 Portsmouth, New Hampshire 03801 (603) 433-4233 Hayward and Company, 355 Oakcrest Road, Bristol, NH 03222 T: (603) 744-0186 (Builders) www.info@haywardandcompany.com Patti Phelps Interior Design, All in the Details, T: 603.224.8033 - [High Shingle Style](https://www.houzz.com/hznb/projects/high-shingle-style-pj-vj~778652) - Location: Bridgehampton, NY - Photos: 18 - Description: Traditional "High" Shingle Style Residence, Bridgehampton, NY 11932 designed exclusively for Farrell Building Company. Robert A. Lenahan Architect AIA PLLC Farrell Building Company, 2317 Montauk Highway, Bridgehampton, NY 11932 T: 631-537-1068, www.farrellbuilding.com (Builder) Kristen Farrell Interior Design, T: 631-537-1068 - [Montauk Beach House](https://www.houzz.com/hznb/projects/montauk-beach-house-pj-vj~2879594) - Location: Montauk, NY - Photos: 20 - Description: Traditional Residence, Montauk, NY 11954 Robert A. Lenahan Architect AIA PLLC Built by: AGC Construction https://buildagc.com/ East Hampton, NY 11937 (631) 868-0165 (O) (631) 774-4215 (C) Interior Design: By Homeowner - [Guest Cottage](https://www.houzz.com/hznb/projects/guest-cottage-pj-vj~1585579) - Location: Montauk, NY - Photos: 21 - Description: Traditional "High" Shingle Style Residence, Montauk, NY 11954 Robert A. Lenahan Architect AIA PLLC John Scollan, Ocean Site Development Inc. P.O. Box 1115 Montauk, NY 11954 T: 631-668-1502, www.oceansitedevelopment.com (Builder) Interior Design: Ioginteriors, Irene O'Gara Goit, T: 631-804-6476 - [Montauk, NY Shingle Style](https://www.houzz.com/hznb/projects/montauk-ny-shingle-style-pj-vj~750078) - Location: Montauk, NY - Photos: 31 - Description: Traditional "High" Shingle Style Residence, Montauk, NY 11954 Robert A. Lenahan Architect AIA PLLC John Scollan, Ocean Site Development Inc. P.O. Box 1115 Montauk, NY 11954 T: 631-668-1502, www.oceansitedevelopment.com (Builder) Interior Design: Ioginteriors, Irene O'Gara Goit, T: 631-804-6476 - [Modern Beach Farmhouse](https://www.houzz.com/hznb/projects/modern-beach-farmhouse-pj-vj~5664695) - Location: Montauk, NY - Photos: 16 - [Portsmouth, NH Duplex](https://www.houzz.com/hznb/projects/portsmouth-nh-duplex-pj-vj~2641409) - Location: Portsmouth, NH - Photos: 5 - [Portsmouth, NH "Seaport Captain's Home"](https://www.houzz.com/hznb/projects/portsmouth-nh-seaport-captain-s-home-pj-vj~750127) - Location: Portsmouth, NH - Photos: 15 - Description: Traditional "Sea Captain's Home" Residence (Renovation) Portsmouth, NH 03801 Robert A. Lenahan Architect AIA Jay Prewitt Builder's, 26 Drake Lane, Eliot, ME 03903 T: 603-498-6690 www.prewittbuilders.com Interior Design: By Owner [See all 22 projects](https://www.houzz.com/professionals/architects-and-building-designers/robert-a-lenahan-architect-aia-pllc-pfvwus-pf~311149370) ## Community Q&A **Q: Hi, can you recall the white paint trim color? Thanks.** *(in Photo Questions)* A: Benjamin Moore "ben Exterior" white soft gloss finish **Q: Hi, can you recall the white paint trim color? Thanks.** *(in Photo Questions)* A: Benjamin Moore "ben Exterior" white soft gloss finish --- *Source: Houzz professional profile. Reflects the profile as of 2026-08-16.*