Getting a house built from the ground up usually takes 10 to 16 months of active construction, plus several months beforehand to line up financing, buy land, and finalize plans. The sequence runs: secure a construction loan, buy a buildable lot, hire an architect and a general contractor, sign a detailed contract, pull permits, insure the project, and then move through foundation, framing, dry-in, rough-in, and finishes until the local building department issues a Certificate of Occupancy. Each phase unlocks the next, and skipping ahead on any one of them is how budgets and schedules unravel.
Line Up Financing First
Most custom builds are funded with a construction-to-permanent loan, which combines the building phase and the long-term mortgage into a single closing. You sign once, and the loan converts automatically when the house is finished. Fannie Mae describes this as a “single-close transaction” in which lenders underwrite both the construction period and the permanent mortgage at the same time using one set of documents.1Fannie Mae. Single-Closing Construction-to-Permanent Financing Transaction Process The alternative is a standalone construction loan that requires a second closing to convert into a traditional mortgage. That means another round of fees and underwriting, which most buyers avoid unless their situation forces it.
During construction you make interest-only payments on the amount drawn so far, not the full loan balance. Funds flow through a draw system: the builder completes a phase, an inspector verifies the work, and the lender releases payment for that stage. Early payments are small because little of the loan has been drawn. They climb as construction progresses.
Down payment requirements vary more than people expect. Conventional construction-to-permanent loans backed by Fannie Mae allow loan-to-value ratios up to 95% on a primary residence, meaning some borrowers put down as little as 5%.2Fannie Mae. Construction-to-Permanent Financing Single-Closing FHA one-time-close loans drop the minimum to 3.5%, and VA construction loans require no down payment for eligible veterans. Local banks that keep construction loans on their own books often still ask for 20% or more because they carry the risk directly.
Build a contingency reserve of at least 10% of total construction cost into your financing plan. Surprises are not a possibility in custom building; they are a certainty. Rock that didn’t show up on the soil report, a material backorder that forces a substitution, a design change that only becomes obvious once the walls are framed. Owners who build without a cushion end up raiding other budget lines or taking supplemental financing mid-project, both of which cost more than planning for the overage up front.
Find a Lot You Can Actually Build On
The lot dictates what you can build, how much it costs, and how long it takes. Not every parcel for sale is practical to build on, and some carry restrictions that can shrink the house you have in mind or eliminate the project altogether.
Zoning, Easements, and Deed Restrictions
Confirm the zoning classification with the local planning department before you make an offer. Residential zones carry density, setback, and lot-coverage requirements that determine how close the house can sit to property lines and how much of the lot the structure can cover. A parcel zoned agricultural or commercial may need a rezoning or a variance before you can build a home on it.
Pull the title and look for easements. Utility easements let power companies, water departments, or telecommunications providers access strips of your land for maintenance. Drainage easements restrict building in areas needed for stormwater flow. These carved-out zones reduce the buildable footprint and can force awkward house placement if you don’t account for them before closing.
Even outside a homeowners association, a lot can carry recorded deed restrictions that limit minimum house size, building height, allowable exterior materials, and whether detached structures like workshops or guest houses are permitted. These covenants run with the land and bind every future owner. Inside an HOA, your plans will also need approval from an Architectural Review Committee under the community’s covenants, conditions, and restrictions (CC&Rs), separate from any municipal permit. Violations discovered mid-build can force design changes at your expense, or lead to legal action from neighbors who have standing to enforce the covenants.
Soil, Survey, and Topography
Soil testing tells you whether the ground can support your home and manage water. A geotechnical engineer drills sample borings and tests for load-bearing capacity, expansive clay content, and the depth of the water table. Basic residential testing runs roughly $1,000 to $3,000, with $2,000 a common bill for a standard single-family lot. The results dictate your foundation type. Expansive soils may require deep piers; a high water table may demand a specialized drainage system beneath the slab. Skipping this step is how people end up with cracked foundations and flooded basements inside the first year.
A professional land surveyor produces the boundary and topographic survey your architect will use to position the house. For a standard residential lot, expect $500 to $2,500 depending on size and complexity. Steep slopes drive up construction costs because you may need retaining walls, custom grading, or a foundation engineered to step down with the terrain. Wetlands, floodplain designations, or protected habitat can prohibit building on portions of the property entirely.
Utilities and Impact Fees
Before buying, verify how far the lot sits from existing water mains, sewer lines, and electrical service. Extending utilities to a remote parcel can add five figures to the budget in a hurry. Tap fees to connect to municipal systems vary enormously, but they commonly range from a few thousand dollars to $30,000 or more depending on pipe diameter and local fee structure. Rural lots outside municipal service areas need a private well and septic system, each with its own permitting, installation, and inspection costs.
Many jurisdictions also charge impact fees on new construction to fund roads, schools, parks, and other infrastructure the new home will use. These are separate from utility tap fees and building permit fees. Some municipalities charge nothing; others charge thousands per dwelling unit. Ask the building or planning department for the current fee schedule before finalizing the land purchase.
Hire the Design and Build Team
Your two most important hires are the person who designs the house and the person who builds it. A licensed architect holds a professional license that requires formal education, an internship, and passage of a multi-part exam. Architects carry professional liability insurance and bear legal accountability for design errors that lead to structural problems or code violations. A residential designer may not hold a license in your state and typically carries less liability exposure. For a straightforward floor plan on flat ground, a designer can work fine. For anything with structural complexity, unusual topography, or high-end finishes, an architect’s stamp is worth the higher fee.
Solicit bids from at least three general contractors using the same set of plans so the numbers are comparable. The best bids break costs into line items rather than presenting a single lump sum, giving you visibility into labor rates, material selections, and markup percentages. Ask each contractor for references from homeowners who finished projects in the past two years, and call them. The questions that reveal the most are about communication habits, how change orders were handled, and whether the project finished close to the original budget.
Verify every contractor you are considering holds a valid license in your jurisdiction and carries both workers’ compensation and general liability insurance. Request a certificate of insurance directly from the contractor’s insurance agent rather than accepting a copy the contractor hands you. If a worker is injured on your property and the contractor doesn’t carry workers’ compensation, you could face a premises liability claim under your own homeowner’s policy, and some homeowner policies explicitly exclude injuries to construction workers. Confirming coverage before signing the contract is the cheapest protection you will ever buy.
Nail Down the Contract and the Paperwork
Scope, Schedule, and Price
The construction contract is the single most important document in the project. A strong contract includes a detailed scope of work listing every material, finish, and task included in the price. Vague language is where disputes are born. If the contract says “standard cabinets” without specifying the manufacturer, product line, and finish, the builder’s definition and yours will diverge on installation day. The same goes for flooring, countertops, light fixtures, and paint.
The contract should also include a schedule of values that breaks the total price into categories aligned with the lender’s draw system. Each draw corresponds to a completed milestone: foundation, framing, dry-in, rough mechanical, finishes. Your lender typically sends an inspector to verify the work before releasing funds. This structure keeps the builder from getting paid ahead of their progress and gives you leverage if quality slips.
Nail down the timeline too. The contract should define a substantial completion date, the point at which the home is functional and ready for occupancy even if minor punch-list items remain. If the builder misses that date without a legitimate reason like weather or material shortages, a liquidated damages clause entitles you to a set dollar amount per day of delay. Not every builder will agree to one, but asking tells you how confident they are in their schedule.
Change Orders
Changes during construction are inevitable; undocumented changes are where budgets explode. Every modification to the original scope, no matter how small, should be captured in a written change order that specifies the new work, the cost impact, and any schedule adjustment. Both you and the builder sign it before the work begins. A verbal agreement to “just go ahead and do it” has no enforceable price cap. Builders who resist putting changes in writing are the ones most likely to surprise you with an inflated invoice later.
Lien Waivers
Lien waivers protect you from claims by subcontractors and material suppliers who weren’t paid by your general contractor. In most states, an unpaid plumber or lumber supplier can place a mechanics lien on your property even if you have already paid the general contractor in full for that work. The lien clouds your title and can block your mortgage conversion. To prevent this, collect a lien waiver from the general contractor with every draw payment. A conditional waiver takes effect only once the check clears; an unconditional waiver takes effect immediately upon signing. Conditional waivers are safer for progress payments because they don’t release your protection until the money actually arrives.
Permits, Inspections, and Builder’s Risk Insurance
No construction can legally begin until the local building department issues a permit. The application requires detailed architectural plans, a site plan showing the home’s position on the lot, and specifications for electrical, plumbing, and mechanical systems. The plans must comply with your jurisdiction’s adopted building code, which in 49 states is based on the International Residential Code.3International Code Council. The International Residential Code Permit fees typically run between 0.5% and 1.2% of the estimated construction value, though some jurisdictions charge a flat fee. Separate trade permits for electrical, plumbing, and HVAC work often apply on top of the main building permit.
Once construction starts, municipal inspectors visit at required milestones. Common inspection points include the foundation before backfill, framing before walls are closed, rough plumbing and electrical before insulation, insulation and fire-stopping before drywall, and the final inspection before occupancy. Failing an inspection doesn’t end the project, but it halts progress until the issue is corrected and the inspector returns. Your builder should know the local inspection sequence cold. Vagueness here is a warning sign.
A standard homeowner’s insurance policy does not cover a house under construction. Most homeowner policies void coverage after 30 to 60 days of vacancy, exclude theft of uninstalled building materials sitting on the lot, and contain exclusions for damage during construction or structural alteration. Builder’s risk insurance fills that gap. It covers the structure as it is being built, protects materials in transit and in storage on site, and can include coverage for soft costs like additional loan interest if a covered loss delays the project. Your lender will almost certainly require a builder’s risk policy before releasing the first draw. The policy typically runs for 12 months, with extensions available if construction runs long. Whether you or the builder pays the premium depends on your contract.
The Construction Sequence
Site Work and Foundation
Construction starts with clearing the lot and excavating for the foundation. Heavy equipment removes trees, brush, and topsoil, then digs trenches or a hole to the depth specified by the structural engineer. Concrete footings reinforced with steel rebar are poured first, spreading the load of the house across a wider area of soil. Foundation walls or a slab go in next, forming the base the entire structure sits on. Waterproofing membranes applied to the exterior of foundation walls keep moisture from migrating into the lower levels. Once the foundation cures and passes inspection, the builder backfills around it and prepares for framing.
Framing
Framing turns the foundation into a recognizable house. Floor joists, wall studs, and roof rafters go up according to the architectural drawings, built from dimensional lumber or engineered wood products depending on span requirements. Plywood or oriented strand board sheathing gets nailed to exterior walls and the roof deck for structural rigidity. This is the first time you can walk through the house and feel the actual room sizes. A framing inspection verifies the structural work before the walls are enclosed.
Dry-In
Making the structure weather-tight is the bridge between exterior and interior work. The roof gets its underlayment and final covering, whether shingles, metal panels, or tile. Windows and exterior doors are installed and sealed. A weather-resistant barrier goes on under the siding to block moisture while letting water vapor escape from inside the wall cavity. Siding, brick, or stone veneer follows. Once the house is dried in, rain and wind can’t damage the interior, and the builder can run mechanical systems without worrying about wet conditions.
Rough-In
With the shell sealed, plumbers, electricians, and HVAC technicians install their systems inside the open wall and ceiling cavities. Plumbers run supply and drain lines. Electricians pull wire to every outlet, switch, and fixture location. HVAC technicians install ductwork, air handlers, and refrigerant lines. All of this work must remain visible for inspection. The building department sends separate inspectors for each trade to verify installations meet code. Only after every rough-in inspection passes can the builder insulate the walls and hang drywall. Covering up uninspected work is a code violation that can force you to tear open finished walls.
Interior and Exterior Finishes
Drywall goes up, gets taped, mudded, and sanded smooth. Painters prime and apply finish coats. Finish carpenters install trim, baseboards, doors, and cabinetry. Countertops, flooring, and tile work follow. Plumbing fixtures, light fixtures, and appliances are the last items installed. Outside, the driveway gets poured, final grading ensures water drains away from the foundation, and landscaping fills in the yard. This phase is where material selections come together, and where change orders are most tempting and most expensive.
Final Inspection, Punch List, and Certificate of Occupancy
After the builder finishes all work, the local building department conducts a final inspection covering fire safety, electrical function, plumbing operation, and overall compliance with the approved plans. If the inspector finds deficiencies, they issue a correction list the builder must address before the project can close out. Minor items rarely cause major delays. Unpermitted work or a code violation in a concealed space can stop the process cold.
Before or alongside the final municipal inspection, you and the builder walk the entire house together to create a punch list of cosmetic defects and incomplete items. Paint touch-ups, cabinet adjustments, scratched hardware, misaligned doors. Hold back a portion of the final payment until every punch-list item is resolved. Builders are far more responsive to a punch list when money is still on the table.
Once all inspections pass and corrections are complete, the local authority issues a Certificate of Occupancy. No one can legally live in the house without one, and your lender won’t convert the construction loan into a permanent mortgage until they have a copy. Expect your property to be reassessed for tax purposes shortly after completion. The new assessed value will reflect the finished home rather than the vacant lot, which means a significant property tax increase on your next bill.
After You Move In: Tax Treatment and Warranties
Interest paid on a construction loan may be deductible as home mortgage interest during the building phase, with a time limit. You can treat a home under construction as a qualified residence for up to 24 months, starting any time on or after the day construction begins, as long as the home actually becomes your qualified residence when it is ready for occupancy.4Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction If the build drags past 24 months, interest paid beyond that window loses its deductibility.
The deduction applies to mortgage debt up to $750,000 ($375,000 if married filing separately) for loans taken out after December 15, 2017.4Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction For a custom build, the total loan amount, including land and construction costs, counts toward that cap. If your project exceeds it, only the interest attributable to the first $750,000 of debt is deductible. Keep detailed records of construction draws and interest payments for your tax preparer.
New homes come with builder warranties that follow a tiered structure commonly called the 1-2-10 rule. During the first year, the builder covers defects in workmanship and materials, such as cracking drywall seams, sticking doors, and paint imperfections. For the first two years, coverage extends to major systems including plumbing, electrical, and HVAC. Structural defects in load-bearing components like the foundation, framing, and roof structure are covered for up to ten years.5Consumer Advice (FTC). Warranties for New Homes These timeframes are industry standards, but the specifics depend on your builder’s written warranty and your state’s implied warranty laws. Read the warranty document before closing. Most warranties do not cover landscaping, normal wear, or damage caused by the homeowner’s failure to maintain the home. Document any defects in writing and submit claims promptly, because waiting too long can forfeit coverage even for legitimate issues.