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    Verified above ground pool installation services reviews

Top-Rated Above ground pool installation pros in Gaithersburg - Updated Nov 2026

Avatar for BJ Pool & Spa
BJ Pool & Spa
4.2(
42
)
Above Ground Swimming Pool or Accessories - Repair or ServiceSwimming Pool - Above Ground, Build or Install - Have MaterialsSwimming Pool - Above Ground, Build or Install - Need Materials

Serving Gaithersburg, MD and surrounding areas

In business since 1983

Credit card accepted

"

My pool needed pretty much a rework of all the filtering and pump equipment due to age.

Contacted several companies for quotes.  BJ's was in the middle ground pricewise, but 2 of the companies were also sky high on their estimates.

These guys removed all the old equipment, put in a new concrete pad, & installed all new equipment.

They started on schedule and finished when they said they would.

Bill from BJ's did a great job and is very professional as is everyone else there at BJs.

Bob (the owner of BJs) even found me a replacement for my outdated fiber optic light which had not worked in years and had been discontinued by the manufacturers for years as well. Talk about finding a needle in a haystack!

Thanks to all at BJs for the great job!



"
Recommended by84%of homeowners
Avatar for Subcomm Pools
Subcomm Pools
5.0(
9
)
Above Ground Swimming Pool or Accessories - Repair or ServiceSwimming Pool - Above Ground, Build or Install - Have MaterialsSwimming Pool - Above Ground, Build or Install - Need Materials

Serving Gaithersburg, MD and surrounding areas

In business since 2006

Free estimates

Credit card accepted

"

Hristo did everything possible to get the job done. This particular June 2016 was filled with many rain days and made his schedule hectic. He kept me in the loop and was up front and honest about the delay noting vinyl liners must be installed in dry, sunny weather - none of which came for a few weeks.

The job was handled quickly and professionally while his team made several visits to complete the job. During this time we got even more rain but the liner was installed by then and they finished all well within the timeframe.

I write all this because Hristo kept me informed which I appreciated and which has earned him and his team my respect and gratitude.

A job more than well done! Also, within budget :)


Frank McGuire

Gaithersburg, MD

"
Pool renovation
Pool renovation
Pool renovation
Additional Photos
Additional Photos

+5

Recommended by100%of homeowners
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Install Above Ground Pools FAQs, answered by experts

It’s fair to be concerned about handling pool lights or wiring in a pool filled with water. But fortunately, pool lights and swimming pools are designed to make it easy and safe to replace the lights without needing to drain the water. Instead, you can turn off the electricity to the pool as a safety precaution, unscrew the pool fixture, pull it up and out to the side of the pool, then change the bulb.

It’s best to avoid having wrinkles in a new pool liner. Since pool liners are very thin, it’s easy to have slight wrinkles in the liner upon initial installation. This might negatively affect your pool’s visual appearance and lead to tearing and holes in some cases. You’ll want to ensure proper measurements and accurate alignment during the installation process to prevent unsightly wrinkles from appearing.

The formula you’ll use to measure your pool will differ based on the shape of your pool. For a rectangular pool, you’ll use the following formula to find the size in gallons: length x width x depth x 7.5. If the depth changes from one end of your pool to the other, take the average by finding the depth at the deepest and most shallow points and dividing that number by two. Circular and oval pools require different, more complicated formulas, which can be found in this article.

Yes, adding a pool to your property will almost always increase your homeowners insurance premiums. This is because pools are considered a greater liability due to their potentially hazardous nature, and the added replacement cost of the pool is factored into your home's rebuilding cost when considering coverage limits. The amount of the increase can range from as little as $50 to a few hundred dollars more per year, depending on your insurance provider, location, current coverage, and the safety features installed. Before building a pool, it is highly recommended to contact your insurance agent to get an estimate, discuss their specific guidelines and requirements, and factor the increased premium into your total pool installation costs.

Yes, you will need to shock your pool with high levels of chlorine or bromine when you first fill it to kill off bacteria and pathogens. You’ll need to wait for the chlorine concentration to come back down to a safe level before swimming. After that, you can test and maintain the chlorine and other levels as normal. The only exception to this is if you get pool water delivered by a professional. In that case, the water might come pretreated, so you might not need to shock it.

The Gaithersburg, MD homeowners’ guide to above ground pool installation services

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