Improved land is any parcel that has been permanently altered from its natural state by human work — utility hookups, grading, drainage, access roads, or structures built on it. Under federal tax regulations, improvements to land are defined as inherently permanent structures and their structural components, and that classification carries through to how the parcel is taxed, depreciated, financed, and permitted.1eCFR. 26 CFR 1.856-10 – Definition of Real Property If you’re trying to figure out what is considered improved land for a purchase, a tax return, or a loan application, the short answer is: anything beyond the raw parcel in its natural condition.
The Line Between Raw and Improved Land
Raw land sits in its natural condition. No utility access, no graded surface, possibly no road leading to it. The moment someone clears vegetation and grades the surface, installs a drainage system, or runs a water line to the property boundary, the parcel has been improved.
A building does not have to exist for land to qualify. Infrastructure alone is enough. A vacant lot with sewer connections, an electrical hookup, and a paved access road is improved land even though nothing has been built on it. Agricultural land that has been leveled and irrigated for farming qualifies for the same reason: it has been modified for productive use. The test is whether permanent work has been done that changes the parcel from its original state.
Federal regulations spell out specific categories of permanently affixed assets that count as improvements to land, including parking facilities, fences, bridges, tunnels, roadbeds, pipelines, transmission lines, storage structures like silos and tanks, and stationary wharves and docks.1eCFR. 26 CFR 1.856-10 – Definition of Real Property Each serves a passive function (containing, supporting, sheltering, covering, or providing a route) and each is expected to remain in place indefinitely.
What Counts as an Improvement
Improvements fall into three broad groupings. Knowing which type you’re dealing with matters for tax treatment, permitting, and resale value.
Utility Infrastructure
Connecting a parcel to water, electricity, natural gas, and sewer service is usually the first step in making raw land usable. Where municipal sewer is unavailable, a septic system does the same job. The IRS treats the cost of extending utility service lines to the property as an addition to basis.2Internal Revenue Service. Publication 551 (12/2025), Basis of Assets In rural areas, drilling a water well is a common improvement, with costs typically running from roughly $1,800 to $24,500 depending on depth and geology. Before a septic system goes in, most jurisdictions require a percolation test to confirm the soil can absorb wastewater, which generally runs between $300 and $3,000.
Site Preparation and Access
Grading the terrain to create a level building surface, installing drainage to prevent water pooling, and clearing vegetation are all land improvements. So are paving roads, pouring driveways, and laying sidewalks. The IRS specifically lists paving a driveway, adding water connections, building sidewalks, and constructing roads as items that increase property basis.2Internal Revenue Service. Publication 551 (12/2025), Basis of Assets A professional land survey to mark boundaries before construction typically runs $200 to $25,000 depending on parcel size and terrain.
Structures and Permanent Fixtures
Buildings are the most visible form of improvement, but the category reaches further. Fences, retaining walls, parking lots, in-ground swimming pools, storage tanks, bridges, and landscaping with permanent plantings all qualify. When the land sells, these permanent fixtures transfer with the title unless the sale agreement specifically excludes them.
How Improvements Change Your Property Tax Bill
Local assessors generally value land and improvements separately, then add the two figures together for the total assessed value. Raw land carries only its base land value. Add utility connections, grade the surface, or put up a structure, and the assessed value climbs. Your annual tax bill rises with it.
Any construction project that requires a building permit will typically trigger a reassessment. The assessor evaluates the market value of the new work and adds it to the existing assessment. Even modest items like paving a driveway, installing a fence, or putting in a drainage system can push the number up enough to show on the tax bill. This catches people who assume site preparation won’t matter because no building went up.
Some local governments create special assessment districts to fund collective infrastructure like sewer extensions, road paving, or drainage systems benefiting a defined group of properties. If your parcel sits inside one, you may owe an additional tax earmarked for that project, usually for a set number of years until the project is paid off. The IRS treats assessments for local improvements like paving and water connections as additions to your property’s basis rather than deductible taxes.2Internal Revenue Service. Publication 551 (12/2025), Basis of Assets
Depreciation and Cost Basis
This is where the split between land and land improvements gets genuinely consequential for anyone holding property for business or investment. Land itself is never depreciable; it doesn’t wear out or become obsolete. Improvements to land are depreciable, and the deductions can be substantial.
The 15-Year Recovery Period
Under the Modified Accelerated Cost Recovery System, land improvements like shrubbery, fences, roads, sidewalks, and bridges are classified as 15-year property.3Internal Revenue Service. Publication 946 (2025), How To Depreciate Property A business owner who spends $150,000 paving a parking lot can recover that cost through depreciation deductions spread over 15 years. The statute also classifies qualified improvement property placed in service after 2017 as 15-year property.4Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System Land improvements used in a business may also qualify for bonus depreciation, which can pull the deduction into fewer years. The percentage depends on when the property is placed in service and current tax legislation, so check Publication 946 for your tax year.
Increasing Your Cost Basis
Every dollar spent on permanent improvements adds to the property’s cost basis. When you eventually sell, your taxable gain equals the sale price minus the adjusted basis. A higher basis means a smaller gain and less capital gains tax. The IRS defines improvements as additions that increase value, prolong useful life, or adapt property to new uses, and lists landscaping, driveways, walkways, fences, retaining walls, and central air conditioning among the items that increase basis.5Internal Revenue Service. Publication 523 (2025), Selling Your Home
For business property, keep a separate account for each improvement. The IRS requires you to depreciate each one under the rules that apply to the underlying property, as if placed in service when the improvement was made.2Internal Revenue Service. Publication 551 (12/2025), Basis of Assets Sloppy recordkeeping here costs real money at sale time, because without documentation of improvement costs you can’t prove the higher basis.
How Improved Status Changes Financing
Lenders treat improved land as significantly less risky than raw land, and loan terms reflect the gap. Raw land loans typically require down payments of 20% to 50% of the purchase price and carry higher interest rates, because the lender is backing a parcel with no infrastructure and uncertain development potential. Improved lots with utility connections, road access, and grading command better terms, with lower down payments and rates closer to conventional mortgage territory.
If you plan to buy raw land and improve it yourself, expect to finance the purchase and the work in stages. Most lenders will not fold speculative site work into a standard mortgage. You may need a land loan for the acquisition, a separate construction loan for the improvements, and eventually a permanent mortgage once a habitable structure exists. Each stage has its own underwriting, appraisal, and closing costs. Budgeting only for the purchase price without accounting for that structure is one of the more common mistakes in land development.
A Separate Rule for Opportunity Zone Investors
If you’re investing through a Qualified Opportunity Fund, the general concept of “improved” is not the one that governs. Section 1400Z-2 of the Internal Revenue Code treats property as substantially improved only if additions to basis during any 30-month period after acquisition exceed the property’s adjusted basis at the start of that period.6Office of the Law Revision Counsel. 26 U.S. Code 1400Z-2 – Special Rules for Capital Gains Invested in Opportunity Zones In practice, that means spending at least as much on improvements as you paid for the existing structures. The land itself is excluded from the calculation, since the substantial improvement requirement doesn’t apply to it.
The threshold drops to 50% of adjusted basis for properties located entirely in rural qualified opportunity zones. The requirement also doesn’t apply when the property qualifies for “original use” within the zone, covering new construction or buildings that have sat vacant for at least five years. For multi-building complexes, the test can be applied on an aggregate basis rather than building by building. Routine maintenance and minor repairs don’t count toward the basis additions; only renovations, rehabilitation work, and new construction that genuinely increase the property’s value or utility qualify.
Development work on improved land often involves separate layers of federal review as well. Projects that discharge dredged or fill material into waters of the United States, including wetlands, generally require a Clean Water Act Section 404 permit from the U.S. Army Corps of Engineers before work begins,7U.S. Environmental Protection Agency. Permit Program under CWA Section 404 and projects that could harm listed species may require an Incidental Take Permit under the Endangered Species Act.8NOAA Fisheries. Permits for the Incidental Taking of Endangered and Threatened Species Those requirements don’t change whether a parcel is considered improved, but they can determine whether a planned improvement can lawfully be built.