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Top-Rated Addition to existing structure builders in Andover - Updated Nov 2026

Avatar for Next Gen Construction
Next Gen Construction
4.7(
15
)
Addition to Existing Structure - Build

Serving Andover, IA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"They did a great job for the job hired - including all the clean up. They also did a little bit more in breaking down and disposing of many other boxes. Would definitely recommend."
Modern Bathroom Remodel
Modern Kitchen
Basement remodel
Basement remodel
Basement remodel

+8

Response time2 days
23 neighbors recently requested a quote
Recommended by33%of homeowners
Avatar for Homemade Design
Homemade Design
3.7(
322
)
Addition to Existing Structure - Build

Serving Andover, IA and surrounding areas

In business since 2006

Credit card accepted

"It was fine. The original design didn’t meet my needs based on the information I provided them. However, they revised the plans which worked out better for me. They were able to get the first draft to me pretty quickly."
Pennsylvania Master Bathroom
Boston Small Condo Kitchen
California Client Saves with HMD Designer Discounts
Recommended by54%of homeowners
Avatar for Jill Seidner Interior Design
Jill Seidner Interior Design
3.5(
89
)
Addition to Existing Structure - Build

Serving Andover, IA and surrounding areas

In business since 2006

Credit card accepted

"Once I sent her all the measurements, it took her a little while to get the options back to me.  Overall, they're good designs.  However, they're very simplistic and give general ideas for space planning.  I was hoping to have a better idea for sizes of furniture for the space and some variations on staging.  
Jill was very responsive when I did have a question.  I'm not sure how helpful it is to have a virtual design done.  If we lived in similar cities, I'd probably use her again for help with additional designs.
"
Recommended by55%of homeowners
Avatar for General Carpentry
General Carpentry
3.9(
7
)
Addition to Existing Structure - Build

Serving Andover, IA and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"The repair job went really well. My door is very unique and required special work. I had a rusted steel frame with holes and they made it look brand new! It was really in bad shape, and they did job. I already them for another job!"
Davenport, IA – Full Home Remodel
Davenport, IA – Full Home Remodel
Davenport, IA – Full Home Remodel
Additional Photos
Additional Photos

+5

Recommended by57%of homeowners
Showing 1-10 of 20
FAQs for addition to existing structure building service projects in Andover, IA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Andover, IA homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.