HN Building Co.
insulation
Serving Hopkinton, IA
From Google Business Profile
4.9
28 Google reviews
Google categories: General contractor, Bathroom remodeler, Construction company, Contractor, Service establishment, Home builder, Kitchen remodeler, Remodeler
View on Google Maps →Last checked October 11, 2026.
More from Google Business Profile
Photos on Google: 148
Recent Google reviews (excerpts)
Written by Google users, not by EdgeLocal. EdgeLocal has not verified them and does not show reviewer names.
5 out of 5 stars · Mar 2026
HN Building Co is singularly the most professional contracting firm I have worked with. Their communication and professionalism is unmatched. Eduardo's attention to detail and management of the company's subs is the highest standard. I…
5 out of 5 stars · Oct 2025 · Owner replied
Excellent over sight and follow through by Eduardo. I have and will continue to recommend HN Building. We had our powder bathroom and master bathroom remodeled. Very pleased with the results.
5 out of 5 stars · Mar 2025 · Owner replied
HN Building did an excellent job for us. They installed floating shelves and painted our accent walls. To include they did it all in a timely manner. We would recommend them to anyone seeking to make home repairs or upgrades.
The owner replied to 3 of the 5 most recent reviews Google showed.
From Google Business Profile, last checked October 11, 2026.
About insulation contractors in Hopkinton
Insulation contractors add attic, wall and crawlspace insulation and air sealing. Insulation contractors perform air sealing, blow cellulose or fiberglass into attics and walls, install spray foam and rigid foam in basements and rim joists, and help homeowners qualify for energy rebates.
Typical cost: $1,800–$6,000 for attic insulation and air sealing. See the full cost guide
Typical U.S. ranges from industry sources (2024–25); not EdgeLocal data. Your quote will vary with scope, materials and location.
Questions to ask this contractor
- Ask for an energy audit: Blower door tests identify air leaks.
- Confirm target R-value: Northern climates typically aim for R-49 to R-60 in attics.
- Ask about air sealing: Insulation works best after air sealing.