How Much Does an Inground Pool Cost in Northern Virginia? (2026)

The Short Answer

Most homeowners in Fairfax, Prince William, and Fauquier counties pay $70,000 to $135,000+ for a fully installed fiberglass pool, including the shell, excavation, plumbing, basic decking, and equipment. The national average for an inground pool sits closer to $66,000, but Northern Virginia labor and site costs push local numbers higher.

Three things move that number more than anything else: pool size, how much concrete or paver decking you add around it, and what your yard needs before anyone can dig. A flat, cleared half-acre lot in Bristow costs less to build on than a sloped, wooded lot in Great Falls or Fairfax Station.

The number that matters most is not the shell price. It is the installed price, which bundles the shell with excavation, plumbing, electrical, backfill, and a basic equipment pad. Any quote that only prices the shell is not a real budget number.

Cost by Pool Size and Type

Fiberglass shells come in fixed sizes, which makes pricing more predictable than poured concrete. Here is what a fiberglass pool installation costs by size class in Northern Virginia.

Pool Size	Approx. Gallons	Installed Cost Range
Small (12' x 24')	~10,000 gal	$70,000 – $85,000
Medium (14' x 28')	~14,000 gal	$85,000 – $105,000
Large (16' x 36')	~20,000 gal	$105,000 – $125,000
Large + tanning ledge, sun shelf, or attached spa	20,000+ gal	$120,000 – $135,000+

These figures assume a fiberglass shell on a reasonably accessible lot with standard decking. A steep grade, poor soil, difficult crane access, or a large land-disturbance footprint can add cost regardless of the pool size you pick. The Outdoor Solutions crew walks every lot across all three counties before quoting for exactly this reason.

For a full breakdown of how fiberglass stacks up against gunite and vinyl on price, see fiberglass vs. gunite vs. vinyl.

Line-Item Add-Ons: What Actually Gets Added to the Base Price

The base installed price covers the pool itself. Almost every project adds at least a few of the items below. Budgeting for these upfront avoids the mid-project sticker shock that catches a lot of first-time pool buyers off guard.

Add-On	Typical Cost
Pool heater	$3,000 – $5,000
Automatic safety cover	$10,000 – $20,000
Pool fencing (per 300 linear ft, code-compliant 48" barrier)	~$8,000
Electrical (sub-panel, bonding, equipment wiring)	$3,000 – $5,000
Water fill	Up to $2,000
Concrete patio / decking (1,200 sq ft)	$12,500+
Paver patio / decking (1,200 sq ft)	$13,000+
Retaining walls (sloped lots)	$10,000 – $35,000
LED lighting	$1,000 – $5,000

Retaining walls deserve special attention here. A lot of Fairfax County and Fauquier County lots sit on a grade, and if your backyard slopes more than a few feet from the house to the planned pool location, expect a wall in the budget. This is often the single biggest surprise line item on a NoVA pool quote.

Because Outdoor Solutions builds pools and hardscape under one contract, decking, retaining walls, and landscaping get priced and scheduled alongside the pool instead of handed off to a second contractor. That usually saves both money and weeks of coordination compared to hiring a pool builder and a separate hardscape crew.

10-Year Cost Comparison: Fiberglass vs. Gunite vs. Vinyl

Upfront price is only part of the picture. Gunite and vinyl pools cost less to build in some cases, but they cost more to keep running. Here is the real 10-year picture.

	Fiberglass	Gunite / Concrete	Vinyl Liner
Installed cost	$70,000 – $135,000+	$65,000 – $120,000+	$40,000 – $75,000+
Build timeline	2 – 3 weeks on site	3 – 6 months	4 – 8 weeks
10-year maintenance	$3,000 – $5,000	$20,000+ (replaster every 8–12 yrs, $10,000–$18,000 per redo)	$6,000 – $10,000+ (liner replacement every 7–10 yrs)
Surface	Smooth gel coat, non-porous	Porous, needs regular acid wash	Liner can wrinkle, fade, tear

Fiberglass usually costs more upfront than vinyl and is comparable to or less than gunite, but it wins the 10-year total-cost comparison against both because there is no replastering and no liner to replace. Gunite's biggest hidden cost is the replaster cycle: every 8 to 12 years, a gunite pool needs $10,000 to $18,000 of resurfacing just to stay watertight and stain-free. Fiberglass shells do not have that recurring bill.

Speed to swim matters too. A gunite pool takes 3 to 6 months from permit to first swim because it is poured, cured, and plastered on site. A fiberglass pool installation is manufactured off site and completed in about 2 to 3 weeks once the shell arrives, which matters if you are trying to hit a specific summer.

See the full breakdown, including winter durability and why fiberglass holds up better through Virginia's freeze-thaw cycles, on our fiberglass vs. gunite vs. vinyl comparison page.

County Permit Fees and Timelines

Every pool over 150 square feet, 5,000 gallons, or 24 inches deep needs a building permit in Fairfax, Prince William, and Fauquier counties. Permit fees themselves are modest, typically $250 to $600, but the review timeline and paperwork requirements vary by county and can affect your schedule more than your budget.

County	What's Required	Typical Timeline
Fairfax	2 plats + 2 pool plan sets through Land Development Services. Disturbing more than 2,500 sq ft of land triggers a grading or conservation plan.	Days for simple sites; 3 weeks – 3 months if a grading plan is required
Prince William	ePortal submission, house location survey plat, setback compliance (roughly 10 ft rear / 15 ft side, varies on larger lots)	Varies by site; City of Manassas adds an excavation bond and its own review
Fauquier	Plat with setbacks, plans or manufacturer's engineered install guide, signed Pool Fence Affidavit	2 – 3 weeks if the application is complete on first submission

A fiberglass pool has a real paperwork advantage in Fauquier County specifically: gunite pool plans there must be sealed by a registered design professional, while a fiberglass pool installation can use the manufacturer's engineered install guide instead. That is fewer steps and less cost before you ever break ground.

All three counties also require a code-compliant barrier: minimum 48 inches high, no gaps a 4-inch sphere could pass through, and a self-latching gate. If roughly two-thirds of Fairfax County homes sitting inside an HOA describes your situation, budget extra time for architectural review committee (ARC) approval before the county permit even gets submitted — HOAs commonly ask for the same plat and plans the county wants, just routed through the community first.

Full permit walkthroughs, including document checklists, are here: Fairfax County pool permits, Prince William County pool permits, and Fauquier County pool permits.

How to Budget for a Pool Project

Start with the installed base price for the pool size you want, then add every line item that applies to your yard: decking, fencing, a heater if you want to extend your swim season, and a retaining wall if your lot has any real slope. A realistic Northern Virginia budget worksheet looks like this.

• Base pool (installed): $70,000 – $135,000
• Decking (1,200 sq ft): $12,500 – $13,000+
• Fencing (300 linear ft): ~$8,000
• Heater: $3,000 – $5,000
• Electrical: $3,000 – $5,000
• Retaining wall, if needed: $10,000 – $35,000
• Permit fees: $250 – $600

Add those up and a mid-size pool with standard decking and fencing on a flat lot lands around $95,000 to $115,000 all-in. A larger pool on a sloped lot with a retaining wall and automatic cover can push past $150,000.

Most homeowners finance some or all of a pool project, with terms typically running 7 to 20 years. See pool financing options for how monthly payments compare across loan terms, and talk to us about what a realistic monthly number looks like for the pool you have in mind.

Why a Winter Contract Saves Money

Northern Virginia's pool season runs roughly April through September. Everyone wants a pool by Memorial Day, which means March through May is the most competitive, most expensive time to book a builder — crews are juggling spring openings, new installs, and winter-damage repairs all at once.

Contracts signed in January or February get ahead of that rush. Permits move through the counties faster in the off-season simply because fewer applications are stacked up. Excavation and installation crews have open calendar slots instead of a spring backlog. And because fiberglass installs in 2 to 3 weeks once the shell arrives, a January contract has a realistic shot at a full summer of swimming — something a gunite pool, with its 3-to-6-month build time, usually cannot promise on the same timeline.

If you are planning for summer 2027, the practical window to sign is January or February 2027, with permits submitted shortly after and excavation in early spring. Researching now and locking in a contract before the spring rush is the single biggest lever you have over both price and schedule.

Ready to see what a project on your lot would cost? Contact NOVA Pool Builders or start with your county page: Fairfax County, Prince William County, or Fauquier County.

Frequently Asked Questions

What is the average cost of an inground pool in Northern Virginia?

A fully installed fiberglass pool in Fairfax, Prince William, or Fauquier County typically costs $70,000 to $135,000 or more, depending on size, decking, and site conditions. The national average for an inground pool is closer to $66,000, but Northern Virginia's higher labor and land costs push local pricing above that baseline.

Is fiberglass cheaper than gunite in the long run?

Yes, over a 10-year window. Gunite pools need replastering every 8 to 12 years at $10,000 to $18,000 per redo, plus ongoing acid washing to manage the porous surface. Fiberglass has no replaster cycle and typically runs $3,000 to $5,000 in total upkeep over the same 10 years.

How much does it cost to add a patio or deck around the pool?

A 1,200 square foot concrete patio runs about $12,500 and up; the same footprint in pavers runs about $13,000 and up. Most homeowners decide between concrete and pavers based on style and budget rather than a large price gap, since the two options land close together. See pool and patio bundled pricing for how this gets combined with the pool build.

Do I need a retaining wall for my pool?

Only if your lot has meaningful grade change between the house and the planned pool location, which is common in parts of Fairfax County and Fauquier County. Retaining walls run $10,000 to $35,000 depending on height and length, and it is one of the most frequently underestimated line items in a NoVA pool budget. A site walk before quoting is the only reliable way to know if you need one.

How much are pool permits in Fairfax, Prince William, and Fauquier counties?

Base permit fees typically run $250 to $600 across all three counties. The bigger cost driver is timeline: Fairfax properties disturbing more than 2,500 square feet of land may need a grading or conservation plan, which adds 3 weeks to 3 months. See what Fairfax County requires, the Prince William permit process, and Fauquier's permit checklist.

Can I finance a pool in Virginia?

Yes. Most homeowners finance some or all of their pool project, with loan terms commonly ranging from 7 to 20 years. Monthly payments vary widely based on loan amount and term length. Visit pool financing for details on how that breaks down.

When should I sign a contract to have a pool ready for next summer?

January or February is the practical deadline for a same-year summer pool. Signing that early gets you ahead of the spring permitting and scheduling rush, and fiberglass's 2-to-3-week install window gives you the best odds of swimming by early summer. Waiting until April or May to sign usually pushes completion into late summer or the following year.

Does an HOA affect my pool cost or timeline?

It can add time, not usually direct cost. Roughly two-thirds of Fairfax County homes sit inside an HOA, and most require architectural review committee (ARC) approval before you can even submit for a county permit. Budget extra weeks for HOA review on top of the county's own timeline, and have your plat and plans ready early since HOAs typically ask for the same documents the county requires.