Buying Land and Building a HomeNorthern Virginia, 2026: costs, permits, loans

Step 1: the house. These are construction-only prices, before land, from NoVA builders' own 2026 price guides. They are sales material, not independent data.

Even the lowest tier costs more than $500,000 for the house alone. National numbers point the same way. NAHB's 2024 builder survey found an average construction cost of $428,215, about $162 per sq ft, for an average 2,647 sq ft home¹. At 3,000 sq ft that comes to about $486,000 (our math), with no land and no Northern Virginia premium. For custom homes started in 2025 on the owner's land, the U.S. Census median was $171 per sq ft, not counting land⁷⁴. That is $513,000 for 3,000 sq ft (our math).

Step 2: the land. These are median close prices for homesites (land of 25 acres or less). Source: Bright MLS, Ahmed's pull of October 22, 2026, last 12 months⁶.

• Fairfax: $900,000, median lot 1.00 acre, 81 sales
• Arlington: $761,000, median lot 0.20 acre, 12 sales
• Loudoun: $584,500, median lot 4.87 acres, 44 sales
• Prince William: $195,000, median lot 2.17 acres, 52 sales
• Alexandria: 4 sales, too few to call

Step 3: hookups. Public water and sewer for one house costs $14,488 in Fairfax County. That is Fairfax Water's $5,090 (from April 1, 2026) plus county sewer at $9,398 (from July 1, 2026)^8,9. With Loudoun Water it costs $19,952 (from January 1, 2026)⁷. On a rural lot, a well runs $6,000 to $16,000 and a septic system runs $7,000 to $40,000 or more. These are Virginia industry estimates^55,56.

Step 4: soft costs and a cushion. One Fairfax cost guide estimates $20,520 for design, engineering and permits on a 2,500 sq ft house⁷³. Lenders usually want a contingency of 5% to 10%⁷¹. A contingency is money set aside for surprises.

Put it together (our math):

• Cheapest case we could source, Prince William: median lot $195,000, plus lowest builder tier $660,000, well $6,000, conventional septic $7,000, soil evaluation and permit $925⁵⁴, design and permits $20,520, and a 5% contingency of $33,000. Total: about $922,000.
• Middle case, Fairfax: median 1-acre lot $900,000 plus middle-tier construction, hookups, soft costs and a 5% to 15% contingency. Total: about $1.96 million to $2.50 million.
• Neither case includes clearing, grading, driveway, electric line, insurance or loan interest.

What $500,000 can do:

• Buy a lot, then borrow to build. If you already own the lot, Fannie Mae measures your loan against the home's "as completed" value. That is the appraised value of the finished house and lot¹⁵. In plain terms, the lot works like your down payment. FHA also lets land equity count toward its 3.5% minimum^16,17.
• Pay for the lot and the down payment together on a one-time-close loan that buys the lot at the same closing¹³.
• Buy new. In the four counties, the lowest-priced new 2,800 to 3,300 sq ft detached home sold for $740,000. The median was $1,249,454 across 116 sales (Bright MLS, Ahmed's pull of October 22, 2026, last 12 months)⁶. $500,000 would be a large down payment.
• Build smaller, or build where land costs less.

These are new detached homes built 2024 to 2026, with 2,500 sq ft or more above grade. Source: Bright MLS, Ahmed's pull of October 22, 2026, last 12 months⁶.

How building compares (our math, rough):

• Loudoun: median land at $584,500 plus middle-tier construction for 3,000 sq ft at $975,000 comes to $1,559,500, before hookups and soft costs. The median new Loudoun home sold for $1,286,352 at 3,217 sq ft.
• Prince William: $195,000 plus $975,000 comes to $1,170,000 before extras. The median new home sold for $1,270,000 at 4,088 sq ft.
• Fairfax: $900,000 plus $975,000 comes to $1,875,000 before extras. The median new home sold for $2,499,900 at 4,832 sq ft.

This is not a perfect match. MLS prices include the land, and the MLS price per sq ft counts only above-grade space. Builder quotes cover construction only. Land medians mix many lot sizes.

• Real estate agent who knows land: finds lots and writes the contract contingencies for perc, survey and financing. Hire first.
• Construction lender: tells you what you can borrow. Talk to them before you make an offer. During the build, the lender pays the builder in stages¹³.
• Soil evaluator (AOSE) or professional engineer (PE): does the perc and soil work and designs the septic. Hire during due diligence, before you close. They must be licensed through DPOR, Virginia's licensing agency⁵¹.
• Land surveyor: maps the boundaries, slopes and setbacks. Hire during due diligence. Confirm their Virginia license.
• Civil engineer: draws the grading, stormwater and erosion plans. Hire after closing, alongside the designer.
• Architect or home designer: draws the house. Hire after closing, or earlier if you want a plan tested against the lot.
• General contractor (builder): builds the house and usually pulls the permits. A contract of $150,000 or more needs a Class A license²⁸. Check the license on DPOR's lookup.
• Well driller: drills and tests the well, after permits.
• Real estate attorney or title company: closes on the land and checks title, easements and recorded conditions. Hire when you go under contract.
• Insurance agent: builder's risk coverage during the build. Ask your lender and insurer who must carry it.
• Utilities: the water authority, the electric company and Washington Gas. Call them early, because gas can take up to 6 months⁶¹.

Lenders may also require your builder to be licensed, bonded and insured under state and local rules⁷⁶.

1. A custom builder on your lot. One licensed firm holds the contract and the permit. This is the route lenders handle most easily. It is also faster. In Census data for homes finished in 2025, contractor-built homes took about 11.7 months from permit to completion. Owner-built homes took 14.3 months¹².

2. A design-build firm. Design and construction come under one contract, so there are fewer handoffs. The tradeoff is less room to take the design to other builders for prices. Some production builders also offer fixed plans on your lot. In Fairfax, plans based on a builder's approved master plan get only a quick review before a permit is issued (FY2022 county report)³⁵.

3. Your own builder, with subcontractors.

• The rule: Virginia Code § 54.1-1101 lets you build without a contractor license, but only one primary residence in any 24-month period²⁶.
• The live-in test: state contractor board guidance says you must live in the home once it is done, with a family exception. If you build to sell, you need a license²⁷.
• Selling early: you need a certificate of occupancy before you sell, unless the buyer agrees in writing to buy without one²⁶.
• Fairfax paperwork: if no licensed contractor is listed on the permit, you file a License Exemption Affidavit³⁰. The county strongly recommends that a licensed contractor pull the permits³¹.
• Trade work: sources disagree on whether you may do your own electrical, plumbing, HVAC or gas work. Ask the county building office and DPOR before you plan on it. Any trades you hire must be licensed.
• FHA: you may act as general contractor only if you are a licensed general contractor¹⁶. One FHA information site says it knows of no FHA lenders that let borrowers do their own work⁸¹.
• Fannie Mae: you must hold title to the lot⁸³, and the lender manages payments to the builder¹³.

MLS counts: Bright MLS, Ahmed's pull of October 22, 2026, last 12 months.

• Loudoun: the zoning ordinance adopted December 13, 2023 is the one in force⁴⁰. Read the official text or call Loudoun Zoning before you buy.
• Rezonings can be undone. In Prince William, the Digital Gateway rezonings were voided and the land went back to its old zoning. The plan amendment stayed in place⁴⁵.
• Erosion rules: a local plan covers work that disturbs 10,000 sq ft or more. In a Chesapeake Bay Preservation Area, the trigger is 2,500 sq ft⁶⁵. A single house may use a signed agreement instead of a full plan⁶⁶.
• Proffers are conditions agreed to in a rezoning. Building one house by right does not bring new ones⁶⁷. Recorded conditions on a rezoned subdivision still must be met before Fairfax issues the occupancy permit²⁹.

• Perc test: checks how water moves through the soil, so a septic field can work.
• Who does it: you hire and pay a private AOSE or PE. The health department accepts their work⁵⁰. The health department does its own evaluation only through a hardship petition⁵¹.
• Cost: $800 to $1,600 per evaluation, from one Virginia builder's 2026 guide⁵⁶. A Virginia septic permit guide puts all permitting at $925 to $1,700. It says Northern Virginia evaluators often charge $800 to $1,200⁵⁴.
• Conventional septic: $7,000 to $15,000⁵⁵.
• Alternative system (AOSS): a treatment unit for soil that does not perc well. It costs $20,000 to $40,000 or more⁵⁵, plus about $200 to $700 a year in upkeep⁸⁰. These are industry estimates.
• Loudoun rules: Chapter 1040 covers wells, Chapter 1066 covers onsite sewage and Chapter 1067 covers alternative systems. Alternative systems need yearly inspection and reporting⁵². Owners must pump the tank at least once every 5 years⁵³.
• Well: $6,000 to $16,000, depending on depth (builder estimate)⁵⁶.
• If the land fails: you may need an alternative system, a smaller house with fewer bedrooms, or you may not be able to build. Make your contract depend on the soil results.

• Running the pipe costs extra. In Loudoun, the owner builds the water and sewer lines from the house to the public main⁶³. In Prince William, owners in unserved areas pay to extend the mains⁶⁴. Ask Fairfax Water whether service connection or local facilities charges apply to your lot⁸⁴.
• Electric, Dominion: lines to your property normally go overhead at no cost. If you want or need underground lines, you pay extra⁵⁷.
• Electric, NOVEC: there is no line extension charge for standard single-phase service, except for underground work⁵⁸. You need a recorded easement and a county wiring inspection before NOVEC connects you⁵⁹. On a 2013 form, NOVEC said design and invoice take 1 to 4 weeks⁶⁰.
• Gas: Washington Gas asks for your request at least 6 months ahead⁶¹. If the new line will not bring in enough revenue, you may pay a share of its cost⁶². With no gas main nearby, your choices are a propane tank or an all-electric home with a heat pump.
• Internet: we have not checked broadband programs. Ask providers about the exact address before you buy.

In NAHB's 2024 national survey, construction was 64.4% of the average sales price and the finished lot was 13.7%¹.

Costs people forget:

• Survey, soil evaluation, civil engineering and architect
• Permits. One third-party guide says plan on $4,000 to $9,000 for a new Fairfax home⁷³
• Water and sewer fees, plus running the lines
• Clearing, grading, driveway, electric line and stormwater work
• Rural site work. One NoVA design-build firm quotes $150,000 to $400,000 for site infrastructure on rural estate land⁵
• Builder's risk insurance, title costs and construction loan interest
• Contingency. Lenders usually want 5% to 10%⁷¹. One builder suggests 15% to 20% or more when the soil or access is uncertain⁷²
• Yearly upkeep if you end up with an alternative septic system⁸⁰

Fannie Mae will not buy a one-closing construction loan until the build is done. Until then, the lender pays the builder in stages¹³. That is why you need a lender that keeps these loans itself. Local and regional banks and credit unions are often named, but ask each lender directly.

LTV means loan-to-value: the loan divided by the home's value.

• Jumbo: the 2026 high-cost ceiling for conforming loans is $1,249,125²². A loan above your county's limit is a jumbo loan. Check FHFA's county table.
• Rates: the 30-year fixed averaged 7.32% on October 22, 2026, down from 7.40% the week before. A year earlier it was 6.19% (Freddie Mac survey)²³.
• Bank standards: in Q2 2026, banks reported construction and land standards basically unchanged. That survey is mostly about developer loans²⁴.

If you are short on cash:

• Buy the land first, build later. Watch for short land loans with balloon payments²⁵. A balloon payment is a large lump sum due at the end.
• Seller financing: have a Virginia attorney review it.
• HELOC on your current home: you could lose the home if you miss payments, and the new payment can lower what you qualify for⁷⁸.
• Bridge loan: one financial planner cites rates of 7% to 11% plus 1.5% to 3% in closing costs⁷⁸.
• Gifts: Fannie Mae allows gift funds under set conditions⁷⁷.
• Builder rule for VA: VA no longer requires a VA builder ID number. State and local licensing still applies¹⁹.

• Building: in Census data on homes finished in 2025, contractor-built homes took about 11.7 months from permit to completion. Owner-built homes took 14.3 months. The South Atlantic region, which includes Virginia, averaged 7.6 months for all homes¹².
• Fairfax permits: in FY2022, the county approved 874 single-family permits in an average of 103 days³⁵. A third-party summary of the FY2024 report says 67 calendar days³⁶. A June 2026 local news report says new-home reviews took about 13 business days³⁷. The county's own timing figures leave out outside agencies such as Health and Zoning⁸².
• Loudoun permits: a completeness check takes up to 10 business days. Review then takes 15 days for the building permit and 10 days for zoning. The county does not say whether those are business or calendar days³⁸.
• Prince William permits: the county asks you to call Building Plan Review at 703-792-6930 for current times³⁹.
• Site plans: a law firm summary says state law cut local review of site and subdivision plans from 60 to 40 days, starting July 1, 2025⁷⁹.
• Loan clocks: Fannie Mae allows no single construction period over 12 months and no more than 18 months in total¹³. USDA limits construction to 12 months²¹.
• Before the permit: we found no official figure. Expect months.

Rough math: about 2 months of Fairfax permit review plus about 12 months to build comes to roughly 14 months, after the land and design are done.

• Applications: an application is treated as abandoned 6 months after filing, unless you are actively pursuing it or the permit has been issued³².
• Issued permits: the building official may revoke a permit if work does not start within 6 months, or if work stops for 6 months³².
• Showing progress: it is on you to prove real progress, for example one approved inspection within 6 months³².
• Extensions: on written request, the building official may grant extensions of up to one year each³².
• Trade permits: plumbing, electrical and mechanical permits are not revoked while the building permit is still in effect³³.
• Code changes: plans approved under an older code edition stay valid while the permit is not suspended or revoked³⁴. A revoked permit may lose that protection.

• Texas, for contrast: in 2009 Texas abolished its residential construction commission. Counties got only limited power to enforce building codes outside cities⁶⁸. In one survey, only 2 of 10 responding coastal Texas counties had a building code for those areas⁶⁹.
• Virginia: one statewide building code, enforced locally. A locality without a building department must arrange enforcement through another locality or an approved agency⁷⁰. No part of Virginia is code-free.
• Northern Virginia adds layers: health review for well and septic, site and grading review, VDOT when the lot is on a state road, and zoning²⁹.

Pros and cons of building vs buying

1. Even the lowest 2026 NoVA builder tier costs $660,000 for 3,000 sq ft, before land².
2. Most mortgage lenders do not do construction loans¹³.
3. Websites disagree on Loudoun lot minimums. The county's sources are what count⁴¹.
4. In Fairfax's Occoquan watershed overlay, the rule is one house per 5 acres⁴⁶.
5. A rezoning can be voided, as Prince William's Digital Gateway showed in 2026⁴⁵.
6. You hire and pay the soil evaluator yourself⁵¹.
7. An alternative septic system can cost $20,000 to $40,000 or more (estimate)⁵⁵.
8. Water and sewer fees come before you pay to run any pipe⁶³.
9. Gas service can take up to 6 months⁶¹.
10. A permit can be revoked after 6 months with no work³².