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Swimming pool heaters installers and replacers in Gaithersburg

Avatar for Millennium Pools and Spas, LLC
Millennium Pools and Spas, LLC
5558 Port Royal Rd
4.68(
76
)
Approved Pro
Millennium Pools and Spas, LLC
5558 Port Royal Rd
4.68(
76
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
218 local quotes requested

Need a little, or a lot of, help with your pool, spa, or fountain? If so, Millennium Pools and Spas is just the company you are looking for! Millennium Pools is an industry leader in Maintenance, Service, and Renovation of pools, spas, and fountains. Do you need an opening and want someone else to clean and maintain your swimming pool? We can do that too! Sit back and relax by your pool all summer long and let us do the work so you don't have to! Millennium Pools and Spas, LLC, has been in business since 2006, but has over 30 years of pool and spa experience. We specialize in major renovation, technical problems, leak repair and offer weekly visits and maintenance package options to make sure everything is up to par! Call Millennium Pool and Spas, LLC, today and enjoy your summer! Serving Northern Virginia, Washington DC and Maryland

"I just had my pool resurfaced by Millennium Pools with Pebblestone. Yan Larenas ((Project Manager) and Elmer Lopez (Superintendent) have been outstanding. They are both very nice, patient (especially since I?m a worrywart), knowledgeable, communicative, organized, and conscientious. At least one of them was here each day of the project to ensure that I was pleased and to personally take care of any items that may have been overlooked by the crews. They are rare individuals who care about their customers and have pride in the work done. I was informed every step of the way and there were no surprises. I have a gorgeous pool now and it went so smoothly, without stress due to Yan and Elmer. I can?t overemphasize how impressed I am with them and how happy I am with my new pool. Thank you so so so much! Norbert Juelich"

Norbert J on April 2025

Need a little, or a lot of, help with your pool, spa, or fountain? If so, Millennium Pools and Spas is just the company you are looking for! Millennium Pools is an industry leader in Maintenance, Service, and Renovation of pools, spas, and fountains. Do you need an opening and want someone else to clean and maintain your swimming pool? We can do that too! Sit back and relax by your pool all summer long and let us do the work so you don't have to! Millennium Pools and Spas, LLC, has been in business since 2006, but has over 30 years of pool and spa experience. We specialize in major renovation, technical problems, leak repair and offer weekly visits and maintenance package options to make sure everything is up to par! Call Millennium Pool and Spas, LLC, today and enjoy your summer! Serving Northern Virginia, Washington DC and Maryland

"I just had my pool resurfaced by Millennium Pools with Pebblestone. Yan Larenas ((Project Manager) and Elmer Lopez (Superintendent) have been outstanding. They are both very nice, patient (especially since I?m a worrywart), knowledgeable, communicative, organized, and conscientious. At least one of them was here each day of the project to ensure that I was pleased and to personally take care of any items that may have been overlooked by the crews. They are rare individuals who care about their customers and have pride in the work done. I was informed every step of the way and there were no surprises. I have a gorgeous pool now and it went so smoothly, without stress due to Yan and Elmer. I can?t overemphasize how impressed I am with them and how happy I am with my new pool. Thank you so so so much! Norbert Juelich"

Norbert J on April 2025


Avatar for Washingtonian Companies
Washingtonian Companies
8645 Ziggy Lane
5.00(
4
)
Approved Pro
Washingtonian Companies
8645 Ziggy Lane
5.00(
4
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1617 local quotes requested

Transform your space with Washingtonian Companies, your interior/exterior design-build team. Whether it's roofing, windows, siding, decks, kitchens, bathrooms, or additions, we are your trusted partner to bring your vision to life and help personalize your surroundings.

"We were 100% satisfied with Washingtonian and with their work building our addition and deck. Not only was the workmanship and quality of the construction outstanding, but they operated with honesty and integrity. Their goal was our satisfaction and building a quality addition and deck. They accomplished all three and were reliable, dependable and conscientious. At no time did we believe that they had over-committed or were unable to deliver on what they had promised. They never cut corners to rush to another job nor did I ever feel that they were not spending the necessary time to ensure that the work on our job was thorough and complete. Travis, Kris and their crew were 100% professional, communicative and transparent. We will be using Washingtonian again, without hesitation. Our experience was excellent and they did an awesome job."

Walter J on January 2024

Transform your space with Washingtonian Companies, your interior/exterior design-build team. Whether it's roofing, windows, siding, decks, kitchens, bathrooms, or additions, we are your trusted partner to bring your vision to life and help personalize your surroundings.

"We were 100% satisfied with Washingtonian and with their work building our addition and deck. Not only was the workmanship and quality of the construction outstanding, but they operated with honesty and integrity. Their goal was our satisfaction and building a quality addition and deck. They accomplished all three and were reliable, dependable and conscientious. At no time did we believe that they had over-committed or were unable to deliver on what they had promised. They never cut corners to rush to another job nor did I ever feel that they were not spending the necessary time to ensure that the work on our job was thorough and complete. Travis, Kris and their crew were 100% professional, communicative and transparent. We will be using Washingtonian again, without hesitation. Our experience was excellent and they did an awesome job."

Walter J on January 2024


Avatar for Freedom Fence & Deck LLC
Freedom Fence & Deck LLC
414 A Back River Neck Rd
4.74(
243
)
Approved Pro
Freedom Fence & Deck LLC
414 A Back River Neck Rd
4.74(
243
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
2627 local quotes requested

Freedom Fence and Deck specializes in affordable top quality maintenance free decks and fences. We are an owner operated company with zero complaints. We also have earned a A+ rating with the Better Business Bureau. We offer a limited Lifetime Warranty on all our work. Angie's List has awarded us the Super Service Award three years in a row.

"Freedom Fence & Deck did an excellent job install our new deck. The sales rep and the workers were friendly and professional. Additionally, I love that the owner of the company is a veteran, and the company offered the best veterans discount compared to the competitive quotes."

Dominique D on January 2025

Freedom Fence and Deck specializes in affordable top quality maintenance free decks and fences. We are an owner operated company with zero complaints. We also have earned a A+ rating with the Better Business Bureau. We offer a limited Lifetime Warranty on all our work. Angie's List has awarded us the Super Service Award three years in a row.

"Freedom Fence & Deck did an excellent job install our new deck. The sales rep and the workers were friendly and professional. Additionally, I love that the owner of the company is a veteran, and the company offered the best veterans discount compared to the competitive quotes."

Dominique D on January 2025


Avatar for River View
River View
2139 Espey Ct, Suite 7 & 8
4.64(
14
)
Approved Pro
River View
2139 Espey Ct, Suite 7 & 8
4.64(
14
)
Approved Pro
Customers say: Quality work
1711 local quotes requested
1 years of experience

At River View our renovations stands out for its comprehensive services, expert team, customized solutions, quality assurance, proactive communication, attention to detail, timely completion, and unwavering commitment to customer satisfaction. Let us turn your renovation dreams into reality request a quote today!

"We write this review as a sigh of relief now that our renovation project with River View is finally complete. The quality of the final work is excellent, and the construction crew, architect, and county inspector were all great to work with. The original crew we worked with, led by Edwin, were so hardworking, friendly, thorough, and fast. That's what really pushed us from 2 to 3 stars. However, the process getting here was frustrating and unnecessarily chaotic. Timeline & Communication Issues: Initial promise: We were clear that the renovation had to allow us to live in our home during construction and be completed before Christmas. Early communication: Our original project manager, Cris, was personable, and early communication seemed fine, if a bit informal and sometimes inappropriately personal. Major miscommunication: Near the holidays, we discovered that the plans submitted included cutting into the roof — something we explicitly said we didn’t want. This contradicted verbal assurances and caused major last-minute changes. Project Management Failures: Poor planning and oversight: Cris and the architect’s plan didn’t align with the construction work. We had to get involved directly with the county to fix errors. Paperwork errors: Incorrect submissions to the county added delays and confusion, which we had to monitor ourselves. Last-minute scramble: We were cleaning up dust on Christmas Eve due to these planning failures. Personnel Turnover & Lack of Handoff: Cris leaves the company: No proper handover to James, the new PM, who was unfamiliar with our project. Crew replaced: The original crew, who were great, were gone; new crew had no context or direction. James leaves: Another handoff with no context — the third PM had no idea about our project or its outstanding items. Escalation mishandled: When we raised our concerns with Kyle, the CEO, the response felt dismissive, with no accountability for the previous missteps. In summary, it's a beautiful end result... but we’re glad it’s over. The process left us frustrated, confused, and frankly, exhausted."

Brian M on April 2025

At River View our renovations stands out for its comprehensive services, expert team, customized solutions, quality assurance, proactive communication, attention to detail, timely completion, and unwavering commitment to customer satisfaction. Let us turn your renovation dreams into reality request a quote today!

"We write this review as a sigh of relief now that our renovation project with River View is finally complete. The quality of the final work is excellent, and the construction crew, architect, and county inspector were all great to work with. The original crew we worked with, led by Edwin, were so hardworking, friendly, thorough, and fast. That's what really pushed us from 2 to 3 stars. However, the process getting here was frustrating and unnecessarily chaotic. Timeline & Communication Issues: Initial promise: We were clear that the renovation had to allow us to live in our home during construction and be completed before Christmas. Early communication: Our original project manager, Cris, was personable, and early communication seemed fine, if a bit informal and sometimes inappropriately personal. Major miscommunication: Near the holidays, we discovered that the plans submitted included cutting into the roof — something we explicitly said we didn’t want. This contradicted verbal assurances and caused major last-minute changes. Project Management Failures: Poor planning and oversight: Cris and the architect’s plan didn’t align with the construction work. We had to get involved directly with the county to fix errors. Paperwork errors: Incorrect submissions to the county added delays and confusion, which we had to monitor ourselves. Last-minute scramble: We were cleaning up dust on Christmas Eve due to these planning failures. Personnel Turnover & Lack of Handoff: Cris leaves the company: No proper handover to James, the new PM, who was unfamiliar with our project. Crew replaced: The original crew, who were great, were gone; new crew had no context or direction. James leaves: Another handoff with no context — the third PM had no idea about our project or its outstanding items. Escalation mishandled: When we raised our concerns with Kyle, the CEO, the response felt dismissive, with no accountability for the previous missteps. In summary, it's a beautiful end result... but we’re glad it’s over. The process left us frustrated, confused, and frankly, exhausted."

Brian M on April 2025


Four Seasons Builders
5.00(
2
)
Approved Pro
Four Seasons Builders
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
210 local quotes requested

We have the experience and dedication to bring your dreams to reality! We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!

"Four Seasons did high quality work, finished on time and within budget. Ken followed through with all contractual commitments and his crew was fantastic."

Mohammed A on October 2024

We have the experience and dedication to bring your dreams to reality! We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!

"Four Seasons did high quality work, finished on time and within budget. Ken followed through with all contractual commitments and his crew was fantastic."

Mohammed A on October 2024


Avatar for A & L Construction
A & L Construction
10621 Oliver St
4.36(
102
)
Approved Pro
A & L Construction
10621 Oliver St
4.36(
102
)
Approved Pro
Customers say: Quality work
657 local quotes requested
40 years of experience

A & L Construction was established in April 1985. Our primary focus: positioning this company as the best construction firm for custom design decks, additions, and remodeling. We serve mostly the Virginia, Maryland, and Washington DC areas. Serving both the builders and homeowners, at A & L Construction we have succeeded in our objective and we continue to expand. Years before incorporating A & L Construction, the founders, Keith and Bill met while working for other companies. Gaining first hand knowledge of quality and craftsmanship in Commercial Remodeling and Historic Restoration projects. Additional DBA - A & L Construction. Locally owned. A&L construction will never ask for money up front. We always get work compleated before asking for payment.

"Oregon usa"

Gero M on June 2022

A & L Construction was established in April 1985. Our primary focus: positioning this company as the best construction firm for custom design decks, additions, and remodeling. We serve mostly the Virginia, Maryland, and Washington DC areas. Serving both the builders and homeowners, at A & L Construction we have succeeded in our objective and we continue to expand. Years before incorporating A & L Construction, the founders, Keith and Bill met while working for other companies. Gaining first hand knowledge of quality and craftsmanship in Commercial Remodeling and Historic Restoration projects. Additional DBA - A & L Construction. Locally owned. A&L construction will never ask for money up front. We always get work compleated before asking for payment.

"Oregon usa"

Gero M on June 2022


Avatar for Ace Fence, Decks, & Patio
Ace Fence, Decks, & Patio
2147 Priest Bridge Court, Suite #5
5.00(
3
)
Approved Pro
Ace Fence, Decks, & Patio
2147 Priest Bridge Court, Suite #5
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
798 local quotes requested

Ace Fence, Decks, & Patios is now one of Maryland's & DC leading and most innovative deck and patio companies with two offices in Maryland and our new branch in Washington, DC. We have worked on many outdoors projects with complex or custom requirements. Our professionals have first-hand experience since 98'. We work with custom designs to deliver architectural consistency with the rest of your home, ensuring our designs look less like "add-ons" and more original to your home. Care is also taken with every detail of your project, beginning from design, and continuing all the way to the detailing in the finish work.

"I had a great experience with this company. Everyone I spoke to was very professional (including Eli, Sonia, Cristina, and Dennis). Unlike some other companies, it was very easy to schedule a time for the sales team to come out and give me a quote AND Eli got the quote back to me super fast. Once I decided on a patio design, the office kept me informed of how long it would take for the materials to arrive and when the team would start working. The team who worked on the patio was very efficient and you could tell that they knew what they were doing. The project turned out great!"

Larry W on August 2022

Ace Fence, Decks, & Patios is now one of Maryland's & DC leading and most innovative deck and patio companies with two offices in Maryland and our new branch in Washington, DC. We have worked on many outdoors projects with complex or custom requirements. Our professionals have first-hand experience since 98'. We work with custom designs to deliver architectural consistency with the rest of your home, ensuring our designs look less like "add-ons" and more original to your home. Care is also taken with every detail of your project, beginning from design, and continuing all the way to the detailing in the finish work.

"I had a great experience with this company. Everyone I spoke to was very professional (including Eli, Sonia, Cristina, and Dennis). Unlike some other companies, it was very easy to schedule a time for the sales team to come out and give me a quote AND Eli got the quote back to me super fast. Once I decided on a patio design, the office kept me informed of how long it would take for the materials to arrive and when the team would start working. The team who worked on the patio was very efficient and you could tell that they knew what they were doing. The project turned out great!"

Larry W on August 2022


Avatar for FA Outdoor Spaces
FA Outdoor Spaces
9979 Main Street
5.00(
15
)
Approved Pro
FA Outdoor Spaces
9979 Main Street
5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1320 local quotes requested

FA Outdoor Spaces is a large exterior home improvement company servicing Northern Virginia, DC and Maryland. With roots in Design and Build having serviced our clients at our sister company FA Design Build, we bring 45+ years of professionalism to every project we undertake. We have teams dedicated to each region ready to serve you. We specialize in all things Outdoors, like Trex & Timber Tech composite decking for new builds, deck reflooring/rerailing, deck enclosures, three season rooms, sunrooms, patios and fencing — all backed with a lifetime installation warranty you won’t find anywhere else.

"Brandon was very easy to work with and got us all set up with an amazing new deck!"

Cameron B on June 2025

FA Outdoor Spaces is a large exterior home improvement company servicing Northern Virginia, DC and Maryland. With roots in Design and Build having serviced our clients at our sister company FA Design Build, we bring 45+ years of professionalism to every project we undertake. We have teams dedicated to each region ready to serve you. We specialize in all things Outdoors, like Trex & Timber Tech composite decking for new builds, deck reflooring/rerailing, deck enclosures, three season rooms, sunrooms, patios and fencing — all backed with a lifetime installation warranty you won’t find anywhere else.

"Brandon was very easy to work with and got us all set up with an amazing new deck!"

Cameron B on June 2025


Remodeling Depot
12 W Church St
New on HomeAdvisorNew on Angi
Approved Pro
Remodeling Depot
12 W Church St
New on AngiNew on HomeAdvisor
Approved Pro
232 local quotes requested
18 years of experience

Remodeling Depot, LLC, proudly serves its customers with pride, integrity and attention to the details that matter most to you. We specialize in a variety of installs and repairs for both residential and light commercial projects. This is one of the many things that sets us apart from the rest. We are locally owned and operated and treat each project as if it were our very own. Give us a call today!

Remodeling Depot, LLC, proudly serves its customers with pride, integrity and attention to the details that matter most to you. We specialize in a variety of installs and repairs for both residential and light commercial projects. This is one of the many things that sets us apart from the rest. We are locally owned and operated and treat each project as if it were our very own. Give us a call today!


Avatar for DECK BUILDERS INC
DECK BUILDERS INC
13475 Bristow Rd.
4.33(
66
)
Approved Pro
DECK BUILDERS INC
13475 Bristow Rd.
4.33(
66
)
Approved Pro
Customers say: Quality work
477 local quotes requested
32 years of experience

We are a custom design build company that has served the northern Virginia area since 1993. Our commitment to the quality in our construction is our top priority and abundantly evident when viewing our projects. Let our in-home design staff help you realize the potential of your project using a new state-of-the-art CAD program. Our construction teams are employees of Deck Builders Inc. and each has at least a five year tenure with our company. We believe that quality control is a stepping stone to achieving customer satisfaction and we welcome the opportunity to serve you from the point of sale and for many years to come. Please visit the free estimates tab to schedule an appointment. LICENSE #: 2705039077A.

"We recently hired Deck Builders, Inc (DBI) to build a new screened porch with a replacement deck and stairs and are very pleased with the results. The owner, Ricardo Anturiano, and the work crew- led by Ronald — were professional, courteous, and hard working. Ricardo was frequently on site and available to answer questions in person, by phone or text. We interviewed 4 different builders in our area before ultimately choosing DBI for several reasons: First, DBI was able to provide the TimberTech composite boards and railings we preferred; second, they offered the most reasonable pricing for our project; and third, we were impressed with their level of expertise and decades of experience. DBI completed our project within budget and the quality of their workmanship is outstanding. If you are looking for an honest, skilled builder, we highly recommend Deck Builders, Inc!"

Susan O on October 2023

We are a custom design build company that has served the northern Virginia area since 1993. Our commitment to the quality in our construction is our top priority and abundantly evident when viewing our projects. Let our in-home design staff help you realize the potential of your project using a new state-of-the-art CAD program. Our construction teams are employees of Deck Builders Inc. and each has at least a five year tenure with our company. We believe that quality control is a stepping stone to achieving customer satisfaction and we welcome the opportunity to serve you from the point of sale and for many years to come. Please visit the free estimates tab to schedule an appointment. LICENSE #: 2705039077A.

"We recently hired Deck Builders, Inc (DBI) to build a new screened porch with a replacement deck and stairs and are very pleased with the results. The owner, Ricardo Anturiano, and the work crew- led by Ronald — were professional, courteous, and hard working. Ricardo was frequently on site and available to answer questions in person, by phone or text. We interviewed 4 different builders in our area before ultimately choosing DBI for several reasons: First, DBI was able to provide the TimberTech composite boards and railings we preferred; second, they offered the most reasonable pricing for our project; and third, we were impressed with their level of expertise and decades of experience. DBI completed our project within budget and the quality of their workmanship is outstanding. If you are looking for an honest, skilled builder, we highly recommend Deck Builders, Inc!"

Susan O on October 2023

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FAQs for swimming pool heaters installation and replacement projects in Gaithersburg, MD

Yes, you can add a heater to an existing pool. A pro can retrofit a heater to nearly any in-ground or above-ground pool. Adding a heater allows you to start the swim season earlier, finish it later, and maintain a steady water temperature in between. Many owners schedule the job during a larger pool upgrade, but it also works as a standalone project. Professional installation ties the new unit into the existing pump and plumbing for safe, efficient operation.

Most owners switch the heater on a day or two before they plan to swim, then shut it down afterward. Reaching the target temperature can take 24 to 72 hours, depending on pool size and outdoor conditions. Using a cover while the heater is off helps hold the heat and keeps energy costs in check.

Pool heaters can freeze if left exposed to extreme conditions. Freezing can damage internal heater components, potentially leading to costly pool repairs. Cycling water, covering the heater, and regular maintenance help prevent freezing. Sealing or winterizing your heater also protects it during the season—this involves draining water from the heater and its components.

Pool heaters operate with lifespans spanning from seven to 30 years. Gas and propane models last seven to 12 years, while electric and solar heaters perform efficiently for up to 30 years. Consistent professional maintenance and routine inspections extend the heater’s life and improve its performance, ensuring a safe and reliable heating system for your pool.

Before hiring a pool heater installation contractor, conduct thorough research by reviewing online feedback and gathering recommendations from trusted sources. Contact multiple professionals to discuss pricing, request references, and understand the complete installation process. This careful evaluation ensures you select a qualified contractor who delivers high-quality service and a successful installation.

The Gaithersburg, MD homeowners’ guide to swimming pool heaters installations and replacements
From average costs to expert advice, get all the answers you need to get your job done.
worker resurfacing plaster on swimming pool with trowel
Jun 12, 2025
Jun 12, 2025
Pool resurfacing costs depend on factors such as pool size, material, refilling, whether your pool is above or below ground, labor, and more.
new swimming pool heating system
Apr 30, 2025
Apr 30, 2025
Budget for pool heater costs based on factors such as your pool size, utility connections, heater type, location, labor, additional features, and more.
an above ground pool installed in backyard with deck
Apr 30, 2025
Apr 30, 2025
Budget for pool deck costs based on factors such as materials, deck size, pool size, location, terrain, prep work, permits, labor, and more.
A beautiful house with a swimming pool in the backyard
Apr 28, 2025
Apr 28, 2025
Budget for pool liner replacement costs based on factors such as pool size, liner type, thickness, draining and refilling, labor, accessibility, and more.
Backyard Swimming pool with a sea view
Apr 27, 2025
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Budget for semi-inground pool costs based on factors such as pool size, type, landscape prep, labor, materials, additional features, and more.
professional servicing swimming pool during maintenance visit
Apr 21, 2025
Apr 21, 2025
Discover how much pool maintenance costs based on factors like the size, type, location, frequency, and level of service.
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