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Home building and construction is among the most regulated and capital-intensive categories a homeowner or developer will ever navigate. Projects range from a $15,000 structural beam repair to a $2 million custom home on a raw lot, and every scope is governed by a layered stack of codes — the International Residential Code (IRC), International Building Code (IBC), local amendments, OSHA 29 CFR Part 1926 for construction site safety, and state-level contractor licensing boards that vary from California's CSLB to Florida's DBPR. The eleven sub-services below organize the HomeBuilder category by project type: ground-up residential and commercial construction, expansions, structural and interior work, remodeling, site prep, exterior systems, specialty builds, permitting and design, and restoration. Knowing which sub-service matches your scope before you call a contractor saves weeks of misdirected quoting.

Q: Do I need a licensed general contractor, or can I act as my own GC and hire subs directly?
Owner-builders can legally act as their own general contractor in most US states, pulling permits in their own name and hiring licensed subcontractors directly. However, most states limit this to primary residences and cap how often you can do it — California allows one owner-builder project every two years, for example. The risk is substantial: you assume full liability for OSHA site safety compliance, subcontractor workers' compensation gaps, and coordination errors. If a framing sub falls on your site and you have no workers' comp in place, you face personal liability. For projects over $100,000 or any commercial scope, hiring a licensed GC is almost always the financially safer path.
Q: What does a general contractor typically charge, and how is their fee structured?
General contractors charge in one of three ways. Cost-plus markup adds 15–25% overhead and profit on top of all subcontractor and material invoices — transparent but open-ended on final cost. Fixed-price or lump-sum contracts give you a guaranteed total but include a contingency buffer (typically 5–10%) that the GC keeps if unused. Construction management fees run 8–15% of project cost on larger commercial or custom residential projects where the owner wants independent oversight. For a $400,000 custom home, GC markup of 20% adds $80,000. Get itemized bids rather than single-line totals so you can compare apples to apples across contractors.
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New Home Construction
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Commercial Building Construction
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Additions and Expansions
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Structural Work
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Interior Build-Outs
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Renovations & Remodeling
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Site Preparation
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Exterior Construction
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Specialty Building Projects
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Permitting, Design & Project Management
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Restoration & Repairs
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HomeBuilder Hiring Guide

📖 Overview

[New Home Construction](https://contractorsplanet.com/?service=home-builder&subcat=new-home-construction) covers ground-up residential builds — from a spec house on a finished lot to a fully custom home engineered from scratch. Builders work under the IRC and local municipal codes, pulling foundation, framing, mechanical, and certificate-of-occupancy permits at each phase. Stick-frame wood construction dominates at $120–$250 per square foot for production builds; ICF (Insulated Concrete Form) and structural steel custom homes run $250–$500+ per square foot in high-cost markets. The general contractor coordinates [Framing](https://contractorsplanet.com/?service=framing), [Electrical](https://contractorsplanet.com/?service=electrical), [Plumbing](https://contractorsplanet.com/?service=plumbing), [HVAC](https://contractorsplanet.com/?service=hvac), and [Roofing](https://contractorsplanet.com/?service=roofing) subs, and the full project timeline typically runs 8–18 months depending on design complexity and permitting jurisdiction.

[Commercial Building Construction](https://contractorsplanet.com/?service=home-builder&subcat=commercial-building-construction) handles new office buildings, retail spaces, light industrial facilities, and mixed-use developments governed by the IBC rather than the IRC. Commercial projects require licensed commercial general contractors, Type I through Type V construction classifications, ADA compliance under the Americans with Disabilities Act, and fire-suppression systems per NFPA 13. Shell construction of a tilt-up industrial warehouse runs $60–$120 per square foot; Class A office shell-and-core runs $200–$400 per square foot, with tenant improvements layered on top. Commercial lenders typically require certified cost estimates and AIA contract formats (A101 or A102) before construction financing closes.

[Additions and Expansions](https://contractorsplanet.com/?service=home-builder&subcat=additions-and-expansions) covers room additions, second-story additions, garage conversions to living space, ADU (accessory dwelling unit) construction, and sunroom or enclosed porch additions. Each triggers a full building permit because the new space must meet current code — not the code in force when the original house was built — which frequently means upgrading electrical panels, adding egress windows to bedrooms, and bringing bathrooms up to current IPC standards. A single-story room addition typically runs $200–$350 per square foot all-in; second-story additions run $300–$500 per square foot because they require temporary shoring of the existing roof. ADUs are increasingly regulated at the state level — California SB 9 and SB 458 have significantly streamlined ADU permitting since 2022.

[Structural Work](https://contractorsplanet.com/?service=home-builder&subcat=structural-work) addresses load-bearing modifications, foundation repair, beam replacement, post-and-pier corrections, seismic retrofitting, and wall removal requiring engineering sign-off. Any modification to load-bearing walls, headers, or the lateral force-resisting system requires a licensed structural engineer's stamped drawings in virtually every US jurisdiction. Foundation repairs range from $2,000 for minor crack injection to $30,000+ for full underpinning or helical pier installation. Seismic retrofit programs — common in California, Oregon, and Washington — typically run $3,000–$10,000 for a cripple-wall bolt-and-brace under the existing IRC Chapter 3 guidelines. This sub-service frequently pairs with [Concrete](https://contractorsplanet.com/?service=concrete) and [Masonry](https://contractorsplanet.com/?service=masonry) contractors depending on foundation type.

[Interior Build-Outs](https://contractorsplanet.com/?service=home-builder&subcat=interior-build-outs) covers the transformation of raw or shell space into finished living or working area — framing interior partitions, hanging and finishing [Drywall](https://contractorsplanet.com/?service=drywall), installing [Flooring](https://contractorsplanet.com/?service=flooring), [Painting](https://contractorsplanet.com/?service=painting), trim carpentry, and coordinating mechanical rough-ins. Commercial tenant improvement build-outs run $50–$200 per square foot depending on finish level; residential basement finishing typically runs $30–$80 per square foot for open layouts and $60–$120 per square foot for fully finished space with bathrooms. Build-outs in older commercial buildings may trigger asbestos abatement requirements under EPA NESHAP 40 CFR Part 61 before any demolition begins — coordinate with an [Asbestos](https://contractorsplanet.com/?service=asbestos) contractor before breaking walls.

[Renovations & Remodeling](https://contractorsplanet.com/?service=home-builder&subcat=renovations-remodeling) handles kitchen and bathroom remodels, whole-home renovations, and selective gut-rehabs where the structure stays but interior systems are replaced or reconfigured. Kitchen remodels average $25,000–$75,000 for mid-range finishes and $80,000–$200,000+ for custom cabinetry, stone countertops, and high-end appliances. Bathroom remodels run $10,000–$35,000 for standard scopes. Whole-home gut renovations of older housing stock typically run $100–$200 per square foot when all mechanical systems are replaced. This sub-service overlaps heavily with the standalone [Renovation](https://contractorsplanet.com/?service=renovation) and [Remodeling](https://contractorsplanet.com/?service=remodeling) categories, which provide more granular breakdowns by room and scope.

[Site Preparation](https://contractorsplanet.com/?service=home-builder&subcat=site-preparation) covers the ground work before any foundation is poured: land clearing, grading, cut-and-fill earthwork, utility trenching, erosion control (required under EPA Construction General Permit for sites over 1 acre), and septic system installation where municipal sewer is unavailable. [Excavation](https://contractorsplanet.com/?service=excavation) contractors handle bulk earthwork, while [Surveyor](https://contractorsplanet.com/?service=surveyor) services establish legal boundaries and benchmark elevations before grading begins. A basic lot clearing and grading package for a residential lot runs $3,000–$15,000; full site prep including utility stubs and septic can reach $30,000–$80,000 in rural markets. OSHA 1926 Subpart P governs excavation safety for trenches deeper than five feet.

[Exterior Construction](https://contractorsplanet.com/?service=home-builder&subcat=exterior-construction-1) covers the building envelope systems applied after framing is complete: [Stucco & Siding](https://contractorsplanet.com/?service=stucco-siding), roofing assemblies (coordinated with [Roofing](https://contractorsplanet.com/?service=roofing) contractors), windows and [Windows](https://contractorsplanet.com/?service=windows) installation, exterior doors, [Balcony](https://contractorsplanet.com/?service=balcony) and deck construction, and waterproofing membranes. Fiber cement siding (James Hardie being the dominant brand) runs $8–$14 per square foot installed; LP SmartSide engineered wood runs $7–$12 per square foot. Deck and balcony construction triggers structural permits in most jurisdictions — IRC Section R507 governs exterior decks, and post-2015 code revisions require galvanized or stainless steel ledger hardware. Exterior waterproofing membrane systems must meet ASTM E2570 water-resistive barrier standards.

[Specialty Building Projects](https://contractorsplanet.com/?service=home-builder&subcat=specialty-building-projects) covers structures and builds that fall outside standard residential or commercial framing: barndominium construction, modular and panelized homes, [Carport](https://contractorsplanet.com/?service=carport) and [Shed](https://contractorsplanet.com/?service=shed) construction requiring permits, [Pool & Spa](https://contractorsplanet.com/?service=pool-spa) structure integration, [Sauna](https://contractorsplanet.com/?service=sauna) room construction, and prefab or steel building erection. Modular homes built to HUD standards (24 CFR Part 3280) typically run $100–$200 per square foot including set and finish; site-built barndominiums run $80–$150 per square foot for the shell. Steel building kits from manufacturers like Mueller Buildings or General Steel run $15–$30 per square foot for the kit alone, with erection and foundation adding $20–$50 per square foot.

[Permitting, Design & Project Management](https://contractorsplanet.com/?service=home-builder&subcat=permitting-design-project-management) handles the pre-construction and administrative layer that determines whether a project breaks ground on schedule or stalls for months. [Architect](https://contractorsplanet.com/?service=architect) services produce stamped construction documents required for permit submission; architectural fees run 8–15% of construction cost on custom homes. Owner's representative and construction management firms charge 5–10% of project cost to oversee GC performance, draw requests, and change order review. Permit fees are set by local jurisdictions and typically run 0.5–2% of construction valuation. Jurisdictions with electronic permit portals (most major metros by 2024) cut review times from 8–12 weeks to 3–6 weeks for standard residential projects. Building [Design](https://contractorsplanet.com/?service=design) professionals — designers who are not licensed architects — can produce permitted plans in most states for standard residential scopes.

[Restoration & Repairs](https://contractorsplanet.com/?service=home-builder&subcat=restoration-repairs) covers damage-driven scopes: fire and smoke restoration, [Water & Mold Remediation](https://contractorsplanet.com/?service=water-mold-remediation) rebuild-outs, storm and hail structural damage repair, and historic preservation rebuilds. Insurance-covered restoration projects are typically bid on Xactimate software — the industry standard for carrier-approved estimates — and contractors without Xactimate familiarity often lose adjuster negotiations. Fire restoration framing and drywall replacement runs $50–$150 per square foot depending on char depth and structural involvement. Historic preservation projects may qualify for federal Historic Tax Credits (20% of qualified rehabilitation expenditures under IRC Section 47) when the structure is listed on or eligible for the National Register of Historic Places.

Choosing the right sub-service is the first step to getting accurate quotes from contractors who specialize in your actual scope. A general framing contractor is not the right call for a seismic retrofit, and a remodeling contractor is not equipped to pull commercial IBC permits. For emergencies — active structural failure, post-fire or post-flood structural assessment, or a foundation crack that appeared suddenly — call a licensed structural engineer directly before any contractor begins work. Most offer emergency assessment appointments within 24–48 hours, and their stamped report protects you in both insurance negotiations and subsequent contractor bidding.

✅ What it covers

💵 Typical cost range

$2,000 to $2,000,000

Cost spans an extreme range because the category covers everything from a $2,000–$5,000 structural crack repair to a $2 million+ custom home. Ground-up residential construction runs $120–$500 per square foot depending on finish level and market. A 2,000 sq ft production home in the Midwest runs $240,000–$400,000; the same footprint in coastal California or New York runs $500,000–$1,000,000+. Room additions average $200–$350 per square foot. Basement finishing runs $30–$80 per square foot open-plan, $60–$120 per square foot fully finished. Kitchen remodels average $25,000–$75,000 mid-range and $80,000–$200,000+ custom. Site preparation adds $3,000–$80,000 before any foundation work. Permit fees run 0.5–2% of construction valuation. General contractor overhead and profit typically adds 15–25% to subcontractor costs on competitively bid projects.

🛡️ Hiring tips

  • Verify your contractor holds a current state general contractor license and check for active disciplinary actions on your state licensing board's website — in California that's CSLB.ca.gov, in Florida it's MyFloridaLicense.com, and most states offer real-time license lookup
  • Require a signed AIA or AIBD contract (or equivalent with equivalent terms) before any work begins — verbal agreements and letter contracts are not enforceable for disputes involving mechanics liens, change orders, or warranty claims
  • Never pay more than 10–15% upfront on projects under $100,000; California law caps deposits at 10% or $1,000, whichever is less, and similar caps apply in many states
  • Get stamped structural engineer drawings before any contractor bids on load-bearing wall removal, foundation repair, or seismic retrofit — bids without engineering are guesses that will be revised after demolition
  • Confirm the contractor will pull permits in their own name, not yours; homeowner-pulled permits expose you to full liability if subcontractors are injured and create problems at resale when inspectors' notes reference unlicensed work
  • Request a lien waiver from the general contractor and each major subcontractor at every draw payment — mechanics liens can attach to your property even if you paid the GC and the GC failed to pay subs
  • Check the contractor's certificate of insurance for both general liability (minimum $1 million per occurrence on residential, $2 million on commercial) and workers' compensation — call the insurer to confirm the policy is active before signing
  • Get at least three detailed line-item bids and compare scope, not just total price — a bid $30,000 lower than competitors often excludes permits, site cleanup, or finish materials that competitors itemized

More frequently asked questions

When does it make more sense to tear down and rebuild rather than renovate an existing structure?
The tipping point is generally when renovation costs exceed 70–80% of the cost to build new. Homes with significant foundation problems, extensive termite or rot damage, knob-and-tube wiring throughout, galvanized plumbing, asbestos-containing materials in walls and ceilings, and load-bearing walls in conflict with the desired floor plan often cross this threshold. A licensed structural engineer's assessment ($500–$2,000) and a preliminary renovation cost estimate from a GC are the two inputs you need to compare against a new-build cost per square foot for your market. Historic tax credits and local preservation ordinances can shift the math toward renovation for qualifying older structures.
What is the difference between stick-frame, modular, and manufactured (HUD-code) construction?
Stick-frame construction is built entirely on-site, piece by piece, under local IRC permits and inspections — it's the dominant method for custom and semi-custom homes and carries no financing restrictions. Modular homes are factory-built in sections to IRC standards, then transported and assembled on a permanent foundation; they finance and appraise like site-built homes and typically cost 10–20% less per square foot for comparable finish. Manufactured homes (formerly called mobile homes) are built to HUD 24 CFR Part 3280 — a federal code, not IRC — on a permanent steel chassis; they finance differently (chattel loans vs. mortgages) and appreciate more slowly. Confusing the three categories leads to wrong financing applications and permit submissions.
What permits are typically required for a new home build, and how long does the process take?
A ground-up residential build requires at minimum a building permit, grading and erosion control permit, electrical permit, plumbing permit, and mechanical permit — often issued as sub-permits under the main building permit. Some jurisdictions also require separate fire sprinkler, energy compliance (Title 24 in California, IECC elsewhere), and right-of-way permits for driveway aprons. Review times range from 3–6 weeks in metro jurisdictions with electronic portals to 12–20 weeks in smaller municipalities with paper-based review. Plan check fees and permit fees together typically run 1–3% of construction valuation. Hiring a permit expeditor ($500–$2,500) can cut review time by 20–40% in congested jurisdictions.
What are the warning signs that a construction project is heading toward major problems?
The clearest early indicators are a GC who cannot produce current lien waivers from subs already paid, draw requests that outpace the percentage of work actually complete, subcontractors who show up and tell you they haven't been paid, and a site that sits idle for more than two weeks without a documented reason. On the structural side, watch for framing lumber that is visibly wet or green-treated where kiln-dried is specified, anchor bolt placement that doesn't match the engineered foundation plan, and any framing inspection that generates a correction notice the GC doesn't share with you. Request a copy of every inspection report directly from your building department — you have the right to that information.
What are the most common contractor scams in home construction, and how do I avoid them?
The most prevalent scam is the large upfront deposit — contractors who demand 30–50% before breaking ground often disappear or become unresponsive once they have your money. A related scheme is the low-ball bid that swells through change orders after demolition reveals 'unexpected' conditions; legitimate contractors include a contingency line in their bid. Storm-chaser contractors who appear after hail or wind events and ask you to sign an insurance assignment of benefits before you've reviewed the adjuster's estimate have become increasingly regulated — some states (Florida, Colorado, Texas) now restrict AOB clauses. Always verify the contractor's license number independently on your state board's website rather than taking their word or their business card.
What should I do if I discover a structural crack or active foundation movement in my home?
Stop any ongoing excavation or grading near the foundation immediately and document the crack with a ruler and dated photos. Horizontal cracks in basement block or poured concrete walls — especially those wider than 1/4 inch or with displacement — indicate lateral soil pressure and are more serious than vertical shrinkage cracks. Call a licensed structural engineer (not a foundation repair contractor, whose business model depends on finding problems) for an independent assessment first; fees run $500–$2,000 for a residential inspection with a written report. If the crack appeared suddenly or is actively widening, contact your homeowner's insurance carrier before any contractor begins work, and consult a [Home Inspector](https://contractorsplanet.com/?service=home-inspector) for a comprehensive baseline condition report.

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