Article updated on September 30, 2026
Most contractor siding jobs are awarded through bidding, so if you want to grow your business, you need to draft up competitive bids that stand above the rest. Fortunately, it’s not too challenging to write an estimate. Let’s look at what a siding bid is and what are the necessary components for a siding cost estimate.
A siding bid is a document sent from a siding contractor that expresses interest in tackling a potential client’s siding project. The bid includes the project’s price breakdown and provides a road map of how the contractor will execute the project.
Siding bids are important for both the contractor and the client. As a contractor, you need to see if the project will be profitable before agreeing to it. And customers use bids to scope out as many contractors and their estimates as possible to find one that fits within their budget and fulfills their requirements.
If you want to win more siding bids, you must include the following:
Although it may seem obvious, adding your contact information to the siding cost estimate bid is central to your business. If it’s not there, they’ll skip over your bid since there’s no way to contact you. Ensure you provide the basics, including your name, business address, phone number, and email address.
You’ll want to provide an overview of the specific siding project. Define the services needed and outline what you’ll achieve. You should include a detailed list of the materials—siding type, color, and brand name. And if you’re using subcontractors, be sure to list them here as well.
Before drafting the siding cost estimate bid, you should have scheduled a visit with the client so you can see the location of the job. It’s during this visit that you’ll get a real idea of the project and determine accurate measurements to ensure a correct estimate. During this visit, it’s crucial to develop a friendly rapport with the potential customer.
You should add your findings from the visit to your bid. This includes site conditions, whether you’ll need to remove old siding, or if there is rotting wood.
Before you can price a siding job, you need an accurate takeoff: how much material the project actually needs.
Start with the exterior wall area, then subtract window and door openings rather than including them in your total, since siding doesn't cover glass or door surfaces. Standard calculators use roughly 21 square feet per door and 9 to 21 square feet per window depending on size, though your own measurements will always be more accurate than an average.
Add a waste factor on top of the net wall area to cover cuts, overlaps, and mistakes. Industry-standard calculators commonly use 10% for simple, rectangular walls, and 15% to 20% for complex layouts with multiple corners, gables, or architectural details.
Beyond the siding panels themselves, a complete takeoff should account for the accessories that go with the job: J-channel and starter strips, corner posts, weather-resistive barrier (house wrap), flashing around windows, doors, and roof lines, mounting blocks for fixtures and vents, and trim coil for fascia and soffit. Missing an accessory line item is one of the easiest ways to underbid a job, since these add up quickly across a full exterior. Getting accurate wall dimensions from the start, rather than re-measuring by hand, is where Hover Measurements can save time on this step.
Don’t just include the final, lump total in your siding cost estimate. It’s important to break out each line item that goes into the cost to show the customer you’re transparent with your pricing. When listing your pricing component, make sure you include:
1. The total cost of siding materials. You can determine this by multiplying the material’s cost per square foot by the home’s total square footage. So, if the project requires vinyl siding at around $3 per square foot for a 1,000-square-foot home, you can charge the homeowner $3,000 for material costs alone; this feeds into the overall siding installation cost.
2. The total cost of additional materials. When siding a house, you need to take into consideration the extra materials needed. This can include J-channel, starter strips, and corner pieces, among others. The cost of labor. To pay your workers fairly, you need to add their wages to the final cost. Determine how many workers you need and how many hours it’ll take to complete the job, and then multiply the two numbers to get the total hours worked. Multiply that sum by their wage to get the total cost of labor.
3. The cost of labor. To pay your workers fairly, you need to add their wages to the final cost. Determine how many workers you need and how many hours it’ll take to complete the job, and then multiply the two numbers to get the total hours worked. Multiply that sum by their wage to get the total cost of labor.
How many hours a siding job actually takes varies more than most cost guides admit, since it depends on more than square footage alone. A few factors consistently drive labor hours up or down:
Material. Fiber cement is heavier and requires specialized cutting tools that produce silica dust, which slows installation compared to lighter materials like vinyl.
Stories and access. A two-story home takes longer per square than a single story, since scaffolding, lifts, or extra ladder trips slow down every step.
Tear-off. Removing existing siding before installing new material adds hours on top of installation, more if there are multiple layers or hidden damage underneath.
Crew size and experience. The same job can take a two-person crew twice as long as a four-person crew.
Because these factors compound differently on every job, tracking your own completed jobs over time is a more reliable guide than any single hours-per-square figure, since published numbers for this vary widely depending on crew setup and methodology.
4. Taxes. You can charge the client the taxes on service and siding material and help yourself from paying taxes on your business profits. We recommend you hire an accountant to help determine what your taxes should be per job.
5. Overhead and profit margin. Including overhead, or extra costs, and giving room for yourself to make a profit helps to prevent surprise expenses and keeps you in business. Your overhead costs could include a myriad of different things, including uniforms, office rent, insurance, accounting, and different software integrations—anything extra you need to complete the project. The profit you choose to add to the final siding project price depends on your desired profit margin. You don’t want it to be too large and possibly scare off potential clients, but making it too small will eat into your business. Typically, contractors add a 10% profit margin to their project’s totals.
A few line items and legal requirements often get left out of a first-draft bid, and each one affects both cost and timeline.
Tear-off and disposal. Removing old siding, renting a dumpster, and disposing of debris all add cost beyond the new material and labor. Price this as its own line item rather than folding it into labor, so the customer sees exactly what it covers.
Sheathing and rot repair. You won't know the full extent of hidden damage until the old siding comes off. Rather than guessing, include a per-unit allowance for rotted sheathing or framing repair, so both you and the customer know how additional damage will be priced if it's found.
Fall protection. Under OSHA's residential construction standard (29 CFR 1926.501), workers 6 feet or more above a lower level must be protected by guardrails, safety nets, or a personal fall arrest system. Factor the cost of that equipment and setup time into multi-story jobs.
Lead paint rules for older homes. If the home was built before 1978, the EPA's Renovation, Repair, and Painting Rule requires your firm to be EPA-certified and to use lead-safe work practices whenever a project disturbs more than 20 square feet of exterior painted surface. Certification, containment, and cleanup all take time and should be reflected in both your price and your schedule.
Last but not least, you’ll want to include the project’s schedule in your bid. This will cover the project's duration from start to finish, detailing siding milestones in between. Remember to add some padding in case of delays or unseen events.
There are a few elements you can add to your siding cost estimate bids to really make them stand out and earn your client’s trust. The first is to incorporate value-added services into the bid. These are details that prove how your services will add value to the potential client. You can show this by providing an extra service or extending an existing one.
Another way to stand above the crowd is to showcase your differentiators by explaining how your business differs from your competitors and why you are perfect for the project. This could mean you use unique siding software that lets the clients see the project before it’s even been completed. Using Hover’s technology, you can snap a few pictures of the home with your smartphone, and the app will develop a 3D model. This interactive model will then give you every measurement you need to estimate a siding project.
With more accurate estimates and this visual in front of them, homeowners are more likely to choose you as their contractor. Business win rates are an impressive 2.6x higher when contractors show a Hover 3D model during appointments. It’s exciting for people to see their own home transformed before their eyes, and Hover gives them a fun and easy way to start playing with the possibilities.
Contractors use "bid," "estimate," and "proposal" differently depending on the region and the business. Generally, a bid or estimate communicates the project's scope and price, while a proposal packages that information for the customer, often with more detail on your company, comparison options, and a signature line. Whichever term you use, a strong document that becomes a signed contract should include:
Inclusions and exclusions. State clearly what's covered, and what isn't, so there's no ambiguity if something comes up mid-project.
Material and color selections. Document the specific products the customer chose, not just "vinyl siding," so there's no dispute about what was agreed to.
Allowance wording. If any portion of the job is priced as an allowance (like rot repair, above), spell out how work beyond that allowance will be priced and approved.
Payment milestones. Most contractors structure payment in stages: a deposit to start, a progress payment, and a final payment on completion, rather than collecting the full amount upfront or waiting until the very end.
A signed change-order process. Any change to scope, price, or timeline should be documented and signed by both parties before the work happens, not agreed to verbally on-site. Tools like Hover Agreements can keep that signature and documentation tied to the same project record as the original bid.
Chat with a rep today to learn how to bid a siding job, see how our software can help you build more accurate bids, and impress customers with an interactive experience.
Nationally, installed siding costs about $4 to $12 per square foot for vinyl, $6 to $15 for fiber cement, $2.25 to $15 for wood, and $6 to $10 for aluminum, depending on your region and the complexity of the job. For real-world examples, including totals for common home sizes like 1,000, 1,500, and 2,000 square feet, see our full breakdown of house siding costs.
As covered above, plan for roughly 10% waste on simple, rectangular walls and 15% to 20% on complex layouts with multiple corners, gables, or heavy detailing. Vertical profiles like board-and-batten and jobs using multiple colors tend to run toward the higher end of that range, since shorter cut runs and color-matching add extra waste. Many pros also set aside a small amount of attic stock, extra material reserved for future repairs, so a matching dye lot is available if it's ever needed.
An estimate is typically a non-binding, educated guess of what a project will cost, since final material and labor pricing can shift once work begins. A quote is more specific and becomes binding once both parties agree to it in writing, which is why some clients specifically ask for a quote rather than an estimate when they want price certainty before signing. As with bid, estimate, and proposal, exact usage varies by contractor and region, so it's worth confirming which one a client is actually asking for.
It can. Some industry sources report that siding proposals sent within 24 hours of the initial consultation convert at meaningfully higher rates than ones that arrive days later, since a prompt, professional bid signals reliability before the work has even started. If you can't turn around a fully itemized bid that quickly, following up with a brief note confirming you're working on it can help keep the lead warm in the meantime.
Not necessarily. Before investing time in a full takeoff and bid, it's worth screening a project for basic fit: does the scope match your crew's experience and capacity, is the timeline realistic, and does the client's budget expectation seem aligned with what the job will actually cost? Bidding on a project that's a poor fit costs you the same preparation time as one you're likely to win, without the payoff.