--- title: "Celtic Building Company, LLC — Home Builders | Houzz" canonical_html_url: https://www.houzz.com/professionals/home-builders/celtic-building-company-llc-pfvwus-pf~1577962120 markdown_url: https://www.houzz.com/md/professionals/pf~1577962120.md entity_type: LocalBusiness business_name: "Celtic Building Company, LLC" category: ["Home Builders"] image: https://st.hzcdn.com/fimgs/e8a35a38031f2ac1_1490-w400-h400-b0-p0--.jpg address: "Boise, Idaho 83702, United States" latitude: 43.6322 longitude: -116.2052 phone: "(208) 484-1699" website: http://www.celticbuildingco.com rating: 5 review_count: 8 best_of_houzz_awards: 1 followers: 18 last_updated: 2026-08-27 --- # Celtic Building Company, LLC Original Houzz profile: [Celtic Building Company, LLC](https://www.houzz.com/professionals/home-builders/celtic-building-company-llc-pfvwus-pf~1577962120) ## Professional summary - **Primary category:** Home Builders - **Location:** Boise, ID - **Serves:** Boise, Meridian, Eagle, Garden City - **Houzz rating:** 5.0 out of 5 (8 reviews) - **Best of Houzz:** 1 award (2015), for Service. ## About ### Houzz Badges - Recommended on Houzz Residential and Light Commercial General Contractor ### Services Provided - New Home Construction - Custom Homes - Home Remodeling - Home Additions - Home Extensions - Energy-Efficient Homes - House Plans - Green Building - Project Management - Garage Building - Home Restoration - Floor Plans - Barn Design & Construction - Site Planning - Drafting - Demolition ### Areas Served - Boise - Meridian - Eagle - Garden City ### Typical Job Cost $5,000 - $500,000 ## Business Details | Field | Value | | --- | --- | | Business Name | Celtic Building Company, LLC | | Address | Boise, Idaho 83702, United States | | Phone | (208) 484-1699 | | Website | http://www.celticbuildingco.com | | License Number | RCE-25661 | | Followers on Houzz | 18 | ## Contact - **Houzz profile:** [Celtic Building Company, LLC](https://www.houzz.com/professionals/home-builders/celtic-building-company-llc-pfvwus-pf~1577962120) - **Website:** http://www.celticbuildingco.com - **Phone:** (208) 484-1699 ## Credentials - **Best of Houzz:** 1 award (2015), for Service. ## Reviews **Overall rating: 5.0 out of 5 — 8 reviews** ### All 8 reviews **★★★★★ — sandybristolbee, March 2014** > James and I worked on several commercial interior design/installation projects during 2012 and 2013 and I highly recommend him. His integrity, attention to detail and customer care was top notch. When he was responsible for the project, I no longer had worries of it being carried through in the best manner it could be. His architectural background made for easy communication and understanding with all the construction trades people and could walk clients through the process with knowledge and understanding. **★★★★★ — c\_ellestad, March 2014** > James is a great personable guy who I've really enjoyed working with. He's the type of contractor you only give his number out to your best-best friends because you always want him to be available for your next job. > My wife and I have done two remodels with him in two different houses. I like that he comes up with smart, cost effective remodel solutions that accomplish the goals of the project. > We have just had him over to take a look at a large remodel on our third house and look forward to using his services. **★★★★★ — carlarriola, March 2014** > I have used James MacIsaac on several projects both at my home and for my company. They included consulting and subcontracting. He is knowledgeable, forthright and detail oriented. I highly recommend Celtic Building Company and James. **★★★★★ — davedahms, March 2014** > James did a great job building our dream house in Boise and we could not be happier! He helped us through the entire process; selecting a lot to purchase, drawing up plans, making recommendations on finishing materials, and everything in-between. We were very impressed by his willingness to answer every question about every little detail and he was great at communicating with us in a timely manner. James spent hours on the construction site to make sure contractors did things right and followed up as needed. The neighboring property owners really appreciated him keeping the site as clean as possible during construction. We have received numerous positive comments about our beautiful new home and we highly recommend Celtic Building for your next project. > > Dave & Jennifer D. > Boise, ID **★★★★★ — williamjim47, March 2014** > James provided general contracting services for a 600sq ft, $65,000 addition to our foothills home, during the 11/2009 to 2/1010 timeframe. He was very easy to work with, and delivered 100% of what he contracted for, and in a very timely manner. He had good rapport with his subcontractors, and they delivered the finished product under his direction and coordination. > > We would not hesitate to use him for any future home projects that we might have in the future. **★★★★★ — jvocal, March 2014** > I have been involved with James MacIsaac professionally for approximately 20 years. He does not compromise his integrity, eye for quality or value proposition for his client. He consistantly demands the best from himself and his suppliers and subcontractors. I believe it is this level of committment that enables Celtic Building Company, LLC to distinquish themselves from their competitors. **★★★★★ — danielriess, March 2014** > I am a Real Estate Broker here in the Treasure Valley, I have worked with James, sold properties with him, and for him. New construction, and renovations. He is reliable, trustworthy, and knows the building/renovation business well. > > James with Celtic Building Company is always at the top of my list to recommend to family, friends and Clients. Feel free to contact me with any questions. > > Sincerely Daniel > > Daniel Riess - Broker > Realty Market Brokers > PH 208-941-0346 **★★★★★ — Emmett M Price, March 2014** > My relationship with Celtic Building Company spans over 25 years. In capacities ranging from estimating,managing client relationships,drafting,construction management and financial reporting.I have not been disappointed in any of these areas. These are just a few of the services that have been provided to me by this company.I continue to work with Celtic Building Company and highly recommend them to others. > Emmett Price,owner > Emmett Price Homes ## Selected projects - [SE Boise New Construction](https://www.houzz.com/hznb/projects/se-boise-new-construction-pj-vj~493460) - Location: Not specified - Photos: 8 - [1960's Foothills Update](https://www.houzz.com/hznb/projects/1960-s-foothills-update-pj-vj~493447) - Location: Not specified - Photos: 2 [See all 2 projects](https://www.houzz.com/professionals/home-builders/celtic-building-company-llc-pfvwus-pf~1577962120) --- *Source: Houzz professional profile. Reflects the profile as of 2026-08-27.*