Modular Home vs Stick-Built Cost Calculator
Introduction: comparing modular and stick-built home costs
This modular-versus-stick-built calculator compares a factory-priced modular home plus its site work with a traditional home's quoted price per square foot. Enter the relevant prices and finished areas to see total project cost and cost per square foot for each construction approach.
The comparison is limited to the direct construction figures entered in the form. It is useful for organizing modular manufacturer quotes and stick-built builder estimates, but it does not automatically capture every cost that may appear in a homebuilding budget.
Modular and stick-built estimates you provide
- Modular home base price ($) – The factory price for the modular unit or package, usually quoted by the manufacturer.
- Site prep & transport cost ($) – Estimated cost for foundation, utilities tie-in, crane, setting the modules, delivery, and other on-site work related specifically to the modular home.
- Modular home size (sqft) – The finished heated living area of the modular home (exclude garages, unfinished basements, or porches unless your quotes use those too).
- Stick-built price per sqft ($) – What a traditional builder charges per square foot for a similar home, including labor and materials.
- Stick-built size (sqft) – The total finished area of the stick-built home you are comparing against.
Modular and stick-built cost formulas
The calculator converts the modular quote and the stick-built per-square-foot estimate into like-for-like cost measures using straightforward arithmetic.
Modular home total and per-square-foot cost
For the modular home, the calculator adds the factory base price to modular-specific site and transport costs to obtain the entered project total:
Where:
- M = total modular home cost
- B = modular base price from the factory
- S = site preparation and transport costs
It then divides that modular total by the modular home's finished area to calculate cost per square foot:
Where:
- Cm = modular cost per square foot
- Am = modular home area (square feet)
Stick-built home total and per-square-foot cost
For the stick-built home, the entered local price per square foot is multiplied by the selected finished area to estimate total construction cost:
Where:
- T = total stick-built cost
- P = stick-built price per square foot
- As = stick-built home area (square feet)
The stick-built cost per square foot shown by the calculator is P, the price-per-square-foot figure entered in the form.
Comparing modular and stick-built costs
To express modular savings, compare the stick-built figures with the modular figures:
- Total modular savings = stick-built total cost minus modular total cost.
- Modular per-square-foot savings = stick-built cost per sqft minus modular cost per sqft.
A positive savings value means the modular estimate is lower for that measure; a negative value means the stick-built estimate is lower.
How to interpret modular versus stick-built results
For a modular-versus-stick-built comparison, read the total-cost and cost-per-square-foot figures together rather than relying on either one alone.
- Modular total cost and cost per square foot.
- Stick-built total cost and cost per square foot.
- The overall cost advantage of one entered estimate over the other.
- The cost-per-square-foot advantage of one entered estimate over the other.
When the modular estimate is lower overall
If the modular total is lower than the stick-built total, the entered factory price plus site work requires less upfront construction spending than the entered stick-built estimate.
If modular is also lower per square foot, the factory package and its associated site work are priced more efficiently than the local stick-built rate used in the comparison. Confirm that both quotes include comparable finishes and scope before treating that gap as a firm savings opportunity.
When the stick-built estimate is lower overall
If the stick-built total is lower, or its per-square-foot figure is lower, the numbers may indicate that:
- Your modular quote is relatively high for the size provided, or
- Local stick-built prices are especially competitive, or
- Site preparation and transport for the modular option are unusually expensive.
This does not automatically make modular unsuitable. It means the entered direct-cost case for modular is less favorable, so any value assigned to scheduling, factory production, or other preferences should be considered separately.
Balancing home size with construction cost
Modular and stick-built plans in this calculator can use different square footages. A smaller modular home can cost less in total while costing more per square foot, and a larger stick-built home can cost more overall while carrying a lower per-square-foot rate.
Use both modular-versus-stick-built measures together:
- Total cost helps you see which option better fits your budget.
- Cost per square foot helps you compare underlying cost efficiency.
Worked example: modular home and stick-built cost comparison
This modular-versus-stick-built example uses the calculator's displayed input values to show how factory, site, and area figures flow through the comparison.
- Modular home base price: $120,000
- Site prep & transport: $30,000
- Modular home size: 1,500 sqft
- Stick-built price per sqft: $150
- Stick-built size: 1,600 sqft
First, calculate the modular total cost:
M = B + S = $120,000 + $30,000 = $150,000
Then, calculate the modular cost per square foot:
Cm = M / Am = $150,000 / 1,500 sqft = $100 per sqft
Next, calculate the stick-built total cost:
T = P × As = $150 × 1,600 sqft = $240,000
The stick-built cost per square foot is simply the input price per sqft, $150 per sqft.
Now compare totals and per-square-foot values:
- Total savings with modular = $240,000 − $150,000 = $90,000
- Per sqft savings = $150 − $100 = $50 per sqft
In this modular comparison, the home is smaller by 100 sqft, but its entered total and per-square-foot cost are both lower. If site costs rose to $80,000, the modular total would be:
M = $120,000 + $80,000 = $200,000
At that point, total savings versus the $240,000 stick-built home would narrow to $40,000, and the modular cost per square foot would increase to:
Cm = $200,000 / 1,500 sqft ≈ $133 per sqft
This example shows why the site-preparation and transport allowance can materially change a modular home's cost position.
Comparison table: modular versus stick-built home considerations
This modular-versus-stick-built table summarizes the cost inputs and practical considerations that can affect the estimates. It is not a cost guarantee, but it can help identify which quote details need closer review.
| Aspect | Modular home | Stick-built home |
|---|---|---|
| Cost structure in this calculator | Base factory price plus site prep & transport, divided by modular square footage. | Price per square foot multiplied by home size. |
| Typical cost predictability | May be easier to define when the factory package and setting scope are clearly specified. | Can change with weather delays, labor availability, and on-site changes. |
| Construction timeline | Factory production and site work may occur at the same time. | On-site work generally follows the construction sequence. |
| Design flexibility | Depends on the manufacturer's catalog and engineering limits; fully custom layouts may be constrained. | Can accommodate custom designs, subject to builder, budget, and site constraints. |
| Site sensitivity | Costs can rise with difficult access, long transport distances, or crane requirements. | Difficult sites can also raise costs, although modules and specialized transport are not required. |
| Appraisal and resale research | Local comparable sales and lender familiarity may require checking. | Local comparable sales may be more readily available in some markets. |
| Energy performance | Depends on the selected factory specifications, installation, and local code requirements. | Depends on the builder, materials, specifications, and local code requirements. |
Assumptions and limits of the modular versus stick-built calculator
This modular-versus-stick-built calculation intentionally uses a narrow set of cost inputs, so review these assumptions before applying the results to a full project budget:
- Land cost is excluded. The tool assumes you already own the land or will evaluate land costs separately. Purchase price, closing costs, and land development fees are not included.
- Soft costs are not modeled. Architectural design, engineering, permits, impact fees, surveys, legal fees, and similar professional services are not part of the calculations unless you manually fold them into your site prep figure.
- Utilities and infrastructure are simplified. Connecting to water, sewer or septic, power, gas, and internet can be costly on some sites. Include these in your site prep estimate if you want them reflected in the modular total.
- Financing, taxes, and insurance are excluded. The calculator compares construction costs only. It does not account for interest on construction loans, mortgage terms, property taxes, or insurance premiums.
- No time-value or delay costs. Schedule differences can have financial impacts, but this modular-versus-stick-built calculation does not assign a dollar value to them.
- Quality and specification differences. The tool assumes you are comparing homes of roughly similar build quality, finishes, and features. A high-end modular home will not be directly comparable to a bare-bones stick-built shell.
- Regional price variation. Stick-built price per square foot and modular quotes vary by region, labor market, materials, and site. The calculator relies entirely on the numbers you enter and does not provide regional defaults.
- Results are estimates, not quotes. Use the outputs as a planning guide and a way to frame conversations with builders or lenders, not as a binding budget or contract price.
Tips for realistic modular and stick-built inputs
Meaningful modular-versus-stick-built results depend on estimates that cover comparable scope, specifications, and finished area.
- Use written quotes when possible. For modular base price and site work, rely on recent quotes from manufacturers and local contractors rather than generic advertising ranges.
- Align specifications. Make sure the modular and stick-built homes you compare have similar bedroom and bathroom counts, finish levels, and energy performance, so the price difference reflects construction method rather than quality.
- Include all major site work. For the modular option, fold in foundation, utility hookups, driveways, and required landscaping if those are not clearly included in either quote.
- Use local stick-built price data. Ask builders, real estate agents, or recent new-home owners in your area what they paid per square foot for similar homes. Online national averages may not reflect your local market.
- Test several site-cost assumptions. Try low, expected, and high estimates for modular site costs and the stick-built price per square foot to see which assumption moves the comparison most.
How to use the modular versus stick-built calculator in your decision process
Use this modular-versus-stick-built calculator as an early comparison tool, then replace broad assumptions with complete, written scopes from the builders and contractors involved.
- Checking whether modular provides a clear cost advantage at your target size.
- Testing how much site costs can increase before modular loses its savings edge.
- Comparing several modular models or packages to a single stick-built design.
- Using the figures in discussions with builders, lenders, or appraisers to clarify the assumptions behind each estimate.
Pair the numeric comparison with non-price considerations such as builder reputation, warranty coverage, customization needs, construction schedule, and local experience with modular projects.
Modular versus stick-built next steps
Because this calculator covers selected direct construction costs, your complete modular or stick-built budget may be higher than the totals shown. Review items such as landscaping, driveways, appliances, furniture, and a contingency allowance separately.
Before selecting a construction method, consider obtaining:
- Detailed written bids from both modular and stick-built builders for the same or very similar plans.
- Professional advice from a construction cost consultant, builder, or real estate agent familiar with modular projects in your area.
- Clarification from lenders and appraisers on how they treat modular homes in your market.
Used with matched scopes and current quotes, this calculator can clarify the direct-cost trade-offs between a modular home and a stick-built home.
Arcade Mini-Game: Modular Home vs Stick-Built Cost Calculator Calibration Run
Use this quick arcade run to practice separating useful scenario inputs from common planning mistakes before you rely on the calculator output.
Start the game, then use your pointer or arrow keys to catch useful inputs and avoid bad assumptions.