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Addition to existing structure builders in Longmont

Avatar for Colorado Paradise Builders, LLC
Colorado Paradise Builders, LLC
2872 Ariel Drive
5.00(
9
)
Approved Pro
Colorado Paradise Builders, LLC
2872 Ariel Drive
5.00(
9
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 local quotes requested

Colorado Paradise Builders, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 20 years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"Francisco Garcia did an excellent job finishing our basement. The work quality is excellent. The communication and flexibility throughout the project was excellent. The project finished on time within budget with zero surprises. Any concerns that arose were addressed expeditiously and professionally. I highly recommend Colorado Paradise Builders for your next project. The building inspections were coordinated by Colorado Paradise Builders and passed easily. We learned while talking to the inspectors that we had a gift by using Francisco as a general contractor. They mentioned other people in the business may not provide the level of customer service and professionalism which Colorado Paradise Builders demonstrated on our basement finishing project. I could not be more enthusiastic with a recommendation."

Jeff B on February 2023

Colorado Paradise Builders, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 20 years of hands-on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"Francisco Garcia did an excellent job finishing our basement. The work quality is excellent. The communication and flexibility throughout the project was excellent. The project finished on time within budget with zero surprises. Any concerns that arose were addressed expeditiously and professionally. I highly recommend Colorado Paradise Builders for your next project. The building inspections were coordinated by Colorado Paradise Builders and passed easily. We learned while talking to the inspectors that we had a gift by using Francisco as a general contractor. They mentioned other people in the business may not provide the level of customer service and professionalism which Colorado Paradise Builders demonstrated on our basement finishing project. I could not be more enthusiastic with a recommendation."

Jeff B on February 2023


Elite Construction
800 E 64th Ave #7
New on HomeAdvisorNew on Angi
Approved Pro
Elite Construction
800 E 64th Ave #7
New on AngiNew on HomeAdvisor
Approved Pro
26 years of experience
Free onsite estimate

Elite Construction LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Elite Construction LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.


Avatar for Green Branch Builders, Inc.
Green Branch Builders, Inc.
193 West Cedar Way
5.00(
5
)
Approved Pro
Green Branch Builders, Inc.
193 West Cedar Way
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

Green Branch Builders, Inc. specializes in remodeling homes. Wherever possible, we incorporate energy efficient green-building products and techniques. Whether you are building a new home or remodeling, you can trust that we will bring integrity and professionalism to our relationship with you and the work we promise. You can expect reliable time-tables, honest pricing and the highest quality possible. We pride ourselves on the relationships we build with homeowners, trade partners and design professionals who may be involved in building or remodeling your home. We aim to finish the project on-time, on-budget and with the highest standard of professionalism.

"Green Branch Builders did an excellent job on our home repairs. They were highly competent and even finished the work ahead of schedule. The crew was always on time and always cleaned up the workspace. They were courteous, and did quality work. They were professional, highly skilled and we would definitely recommend them and use them for our future work."

Carrie S on August 2014

Green Branch Builders, Inc. specializes in remodeling homes. Wherever possible, we incorporate energy efficient green-building products and techniques. Whether you are building a new home or remodeling, you can trust that we will bring integrity and professionalism to our relationship with you and the work we promise. You can expect reliable time-tables, honest pricing and the highest quality possible. We pride ourselves on the relationships we build with homeowners, trade partners and design professionals who may be involved in building or remodeling your home. We aim to finish the project on-time, on-budget and with the highest standard of professionalism.

"Green Branch Builders did an excellent job on our home repairs. They were highly competent and even finished the work ahead of schedule. The crew was always on time and always cleaned up the workspace. They were courteous, and did quality work. They were professional, highly skilled and we would definitely recommend them and use them for our future work."

Carrie S on August 2014


Avatar for Kiefer Built Contracting
Kiefer Built Contracting
3160 35th Ave Unit 4
5.00(
2
)
Approved Pro
Kiefer Built Contracting
3160 35th Ave Unit 4
5.00(
2
)
Approved Pro
Customers say: Quick response
26 years of experience

We create innovative environmental solutions for homeowners and business owners, believing that the spaces we shape in turn shape us. At Kiefer Built Contracting, we believe in creating environments that enhance the lives of homeowners and business owners alike. Our values are rooted in the understanding that the spaces we inhabit significantly influence our well-being, comfort, and sense of identity. We believe a home is a sanctuary for family, friends, and memories. Our designs emphasize welcoming entryways, inclusive dining spaces, ample natural light, and spacious rooms. Using advanced materials like SIPs and ICFs, we create beautiful, sustainable, and efficient homes that enrich lives.

"We met with them several times to make sure we were all on the same page. They helped us adjusted our goals to match our budget. The final product looks fantastic."

Garan W on January 2023

We create innovative environmental solutions for homeowners and business owners, believing that the spaces we shape in turn shape us. At Kiefer Built Contracting, we believe in creating environments that enhance the lives of homeowners and business owners alike. Our values are rooted in the understanding that the spaces we inhabit significantly influence our well-being, comfort, and sense of identity. We believe a home is a sanctuary for family, friends, and memories. Our designs emphasize welcoming entryways, inclusive dining spaces, ample natural light, and spacious rooms. Using advanced materials like SIPs and ICFs, we create beautiful, sustainable, and efficient homes that enrich lives.

"We met with them several times to make sure we were all on the same page. They helped us adjusted our goals to match our budget. The final product looks fantastic."

Garan W on January 2023


Avatar for Martucci Contracting Solutions LLC
Martucci Contracting Solutions LLC
8087 Lafayette St
New on HomeAdvisorNew on Angi
Approved Pro
Martucci Contracting Solutions LLC
8087 Lafayette St
New on AngiNew on HomeAdvisor
Approved Pro
1 years of experience
Free onsite estimate

Welcome to Martucci Contracting Solutions, where passion meets precision. A small, family-owned contracting company, dedicated to delivering exceptional residential and commercial remodeling experiences. Transparency, honesty, and unparalleled customer service are the cornerstones of our business. We believe every project, no matter the size, deserves meticulous attention to detail and unwavering commitment to excellence. From concept to completion, we'll guide you through a seamless, stress-free process. Trust us to bring your vision to life with integrity, craftsmanship, and heart. Our team of skilled professionals is passionate about creating spaces that inspire and delight. We take pride in our work, and it shows in every detail, every finish, and every smile from a satisfied client. Whether you're looking to renovate a single room or an entire property, we're here to listen, advise, and deliver outstanding results. Let us help you build your dream – we can't wait to get started!

Welcome to Martucci Contracting Solutions, where passion meets precision. A small, family-owned contracting company, dedicated to delivering exceptional residential and commercial remodeling experiences. Transparency, honesty, and unparalleled customer service are the cornerstones of our business. We believe every project, no matter the size, deserves meticulous attention to detail and unwavering commitment to excellence. From concept to completion, we'll guide you through a seamless, stress-free process. Trust us to bring your vision to life with integrity, craftsmanship, and heart. Our team of skilled professionals is passionate about creating spaces that inspire and delight. We take pride in our work, and it shows in every detail, every finish, and every smile from a satisfied client. Whether you're looking to renovate a single room or an entire property, we're here to listen, advise, and deliver outstanding results. Let us help you build your dream – we can't wait to get started!


Black Diamond Builders
1102 4th Avenue
4.80(
5
)
Approved Pro
Black Diamond Builders
1102 4th Avenue
4.80(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Black Diamond Builders, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Quality work , good attitude , and quality workmanship"

Stacy P on February 2024

Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Black Diamond Builders, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Quality work , good attitude , and quality workmanship"

Stacy P on February 2024


Gerrard Construction, Inc.
5400 West Highway 34
4.88(
26
)
Approved Pro
Gerrard Construction, Inc.
5400 West Highway 34
4.88(
26
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
47 years of experience

Welcome to Gerrard Construction, Inc.! We are based out of Loveland and provide service throughout the surrounding areas. We specialize in interior renovation and additions. We are a family owned and operated business and have been established for over 35 years, providing only top notch quality work. If you have any questions or would like to schedule an estimate, just give us a call!

"Good to get along with has an excellent crewð"

Jim S on August 2023

Welcome to Gerrard Construction, Inc.! We are based out of Loveland and provide service throughout the surrounding areas. We specialize in interior renovation and additions. We are a family owned and operated business and have been established for over 35 years, providing only top notch quality work. If you have any questions or would like to schedule an estimate, just give us a call!

"Good to get along with has an excellent crewð"

Jim S on August 2023


Parker & Parker, Design-Build Architects Residential Structural Consultants
150 SE 4th St
5.00(
13
)
Approved Pro
Parker & Parker, Design-Build Architects Residential Structural Consultants
150 SE 4th St
5.00(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
52 years of experience

Welcome to Don G Parker. We are the premier professional firm offering a multitude of services from architectural design and technical drawings, to structural consultation and advise. We offer exciting and affordable creativity along with extraordinary attention to detail. We apply these attributes to these additional services which include: All types of residential work (historical or not) church design and renovation, structural help, interior design, furniture design, magnificent church windows, hard landscaping, code research, and all types of space planning. Our list of happy clients is as extensive as our experience; not boring experience but an innovative and exciting history born of interesting clients and challenging circumstances. Bring us your ideas and challenges, and we together, with you, will transform them into opportunities realized. Call us, challenge us, and together we'll get going.

"Very nice, informative and a real professional."

Kelly M on December 2020

Welcome to Don G Parker. We are the premier professional firm offering a multitude of services from architectural design and technical drawings, to structural consultation and advise. We offer exciting and affordable creativity along with extraordinary attention to detail. We apply these attributes to these additional services which include: All types of residential work (historical or not) church design and renovation, structural help, interior design, furniture design, magnificent church windows, hard landscaping, code research, and all types of space planning. Our list of happy clients is as extensive as our experience; not boring experience but an innovative and exciting history born of interesting clients and challenging circumstances. Bring us your ideas and challenges, and we together, with you, will transform them into opportunities realized. Call us, challenge us, and together we'll get going.

"Very nice, informative and a real professional."

Kelly M on December 2020


Avatar for Baker Building Services
Baker Building Services
1141 Ridge View Cir
4.77(
13
)
Approved Pro
Baker Building Services
1141 Ridge View Cir
4.77(
13
)
Approved Pro
Super Service Award
Customers say: Quality work
23 local quotes requested
17 years of experience

Baker Building Services has over 20 years of experience when it comes to home improvement. We specialize in home additions, remodeling, as well as new home construction. Call today for a free estimate!

"I hired Brant to remove and old unsightly fireplace, repair dry wall and have it prepared for me to paint. Brant was thorough, professional and kind. He was great to work with and very generous with his time."

Josh D on April 2025

Baker Building Services has over 20 years of experience when it comes to home improvement. We specialize in home additions, remodeling, as well as new home construction. Call today for a free estimate!

"I hired Brant to remove and old unsightly fireplace, repair dry wall and have it prepared for me to paint. Brant was thorough, professional and kind. He was great to work with and very generous with his time."

Josh D on April 2025


Avatar for Jones & Company
Jones & Company
124 Canon Park Dr
5.00(
4
)
Approved Pro
Jones & Company
124 Canon Park Dr
5.00(
4
)
Approved Pro
38 years of experience
Free onsite estimate

As Founder and President of Jones & Company, Craig maintains strong working relationships with clients, banks, realtors, designers, subcontractors and building inspectors, which has allowed Jones & Company to grow and flourish for nearly three decades. The companies success is a testament to Craig's creativity, ingenuity and integrity. He respects and is respected by everyone he works with, which has given him a solid reputation throughout the local industry. Having studied sustainable design and architecture at the University of Colorado, he is able to advise owners with design ideas when requested. Craig is known for his high standards throughout construction

"Craig and company were professional, competent, timely and helpful. Craig is very invested and great at providing creative solutions. We are very happy with our beautiful - and more efficient remodel."

Guy P on June 2025

As Founder and President of Jones & Company, Craig maintains strong working relationships with clients, banks, realtors, designers, subcontractors and building inspectors, which has allowed Jones & Company to grow and flourish for nearly three decades. The companies success is a testament to Craig's creativity, ingenuity and integrity. He respects and is respected by everyone he works with, which has given him a solid reputation throughout the local industry. Having studied sustainable design and architecture at the University of Colorado, he is able to advise owners with design ideas when requested. Craig is known for his high standards throughout construction

"Craig and company were professional, competent, timely and helpful. Craig is very invested and great at providing creative solutions. We are very happy with our beautiful - and more efficient remodel."

Guy P on June 2025

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FAQs for addition to existing structure building service projects in Longmont, CO

Building an in-law suite takes between two and seven months. Converting an existing basement, attic, or room can be done in about two months. Constructing a new addition or detached suite often takes four to five months for construction, plus one to two months for permits. The bigger the suite, the longer it will take. 

Yes, you can build an in-law suite in your backyard if you meet local building codes and zoning regulations. An in-law suite often occupies 300 to 800 square feet. Be sure to follow size restrictions, utility separations, and entrance requirements. Hiring a qualified contractor ensures you meet all regulatory requirements because they can pull permits, double-check local code, and gather other skilled pros to work on your suite. 

An in-law suite is a self-contained living space attached to—or detached from—your main home. Expect a bedroom, full bath, and a kitchenette or compact living area. The setup gives relatives privacy, doubles as a potential rental, and can lift your property value. To qualify as a legal dwelling, the suite must meet local building codes and zoning rules.

The Longmont, CO 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.
Cozy house interior with a wooden floor
Jun 17, 2025
Jun 17, 2025
Explore how much it costs to replace floor joists based on factors such as the extent of damage, number of boards, and local labor rates.
Outdoor view of the modern house
Jun 16, 2025
Jun 16, 2025
Explore how square footage, room type, home additions, and other common factors affect house renovation costs with our detailed cost guide.
BRIGHT OPEN ATTIC SPACE
Jun 10, 2025
Jun 10, 2025
An in-law suite is a great solution for people who have family visiting often. Explore how much an in-law suite costs and prep to build yours.
white and gray kitchen with butchers block countertop
Apr 8, 2025
Apr 8, 2025
Looking to enhance the warmth and utility of your kitchen? Explore how much a butcher block countertop costs and start your budget here.
built-in outdoor kitchen with grill and sink
Apr 30, 2025
Apr 30, 2025
Budget for outdoor kitchen costs based on factors such as appliances, materials, permits, labor, amenities, kitchen size, customizations, and more.
BLUE TWO STORY HOME
Apr 30, 2025
Apr 30, 2025
Budget for the cost to add a second story based on factors such as size, foundation work, materials, labor, permits, post-construction cleaning, and more.
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