Guide
What to Include in a Construction Scope of Work
A scope of work (SOW) describes exactly what will be built, repaired or installed, and just as importantly what won't. It is the document every bid is priced against. When bids come back far apart, the cause is often a vague scope that each contractor read differently.
Why the scope matters
- It lets contractors price the same job, so bids are comparable.
- It sets the standard the finished work is checked against.
- It is the baseline for change orders: anything outside it is a change.
What to include
- Project overview. Property address, the area(s) of work, and the goal in one or two sentences ("Replace the flat roof on Building C").
- Reference documents. Drawings, specifications, photos, engineering reports, and HOA or lender requirements, each with a date or revision.
- Work included. Described by area or trade, in the order it happens: demolition and removal, preparation, installation, finishes, and connections to existing systems.
- Quantities and measurements. Square footage, counts, and dimensions where known — or a clear statement that the contractor is responsible for field-verifying them.
- Materials and specifications. Product, brand and model, grade, color, or a performance standard, and whether substitutions ("or equal") are allowed and who approves them.
- Owner-supplied items. Anything you will provide (fixtures, appliances, tile), and who receives, stores and installs it.
- Work excluded. Adjacent work that is not part of this job, and any work by others.
- Existing conditions. What is known, what hasn't been inspected, and how hidden conditions (rot, outdated wiring, hazardous materials) will be handled if found.
- Permits, codes and inspections. Who pulls and pays for permits, schedules inspections, and provides any required engineering.
- Site logistics. Working hours, access, parking, staging, utilities available to the contractor, occupied-space rules, protection of finishes, and daily cleanup.
- Schedule and milestones. Target start and completion, milestones payments tie to, and known constraints such as tenant move-ins or weather-sensitive work.
- Acceptance criteria. How "done" is judged: passing inspection, a specific finish standard, a completed punch list.
- Closeout deliverables. Final cleaning, punch-list completion, warranties and manuals, as-built notes, and lien waivers.
- Changes. Changes need written approval with price and schedule impact before the work proceeds.
Vague versus clear wording
| Vague | Clear |
|---|---|
| Update the bathroom. | Remove existing vanity, toilet and floor tile. Install owner-supplied 36 in. vanity and new toilet; tile floor (approx. 50 SF) with tile at $X/SF allowance. |
| Fix the roof. | Tear off existing membrane to deck on Building C (approx. 12,000 SF, contractor to field-verify). Replace damaged decking at a unit price per SF. Install new membrane per attached specification. |
| Paint the unit. | Patch and paint walls and ceilings in all rooms, two finish coats, owner-selected colors; trim and doors semi-gloss. Exclude cabinets. |
| Contractor handles cleanup. | Broom-clean work areas daily; remove all debris from site; final clean before walkthrough. |
Quantities and allowance amounts above are placeholders to show the form of the wording.
Handling unknowns
Every renovation has some. Rather than hoping, write them in: ask for unit prices for likely extras (per square foot of replaced decking, per linear foot of replaced pipe), set allowances for undecided items, and state that hidden conditions will be documented with photos and priced by change order before work continues.
Scope of work checklist
- Address, area of work and project goal
- Reference documents with dates or revisions
- Included work, in sequence, by area or trade
- Quantities or a field-verification requirement
- Materials, specifications and substitution rules
- Owner-supplied items and who installs them
- Exclusions and work by others
- Existing and hidden conditions process
- Permits, inspections and engineering responsibility
- Hours, access, staging, protection and cleanup
- Schedule, milestones and constraints
- Acceptance criteria and closeout deliverables
- Change-order process
Using a scope with BidCraft
Property owners can post a project on BidCraft and have contractors bid against the same scope, then line the bids up side by side; AI drafts the scope from your project description for you to edit. If you'd rather hand the project off, Project Help takes a short description and comes back with a contractor and comparable pricing. Contractors can draft a bid from a scope description with the free Quick Bid.
Frequently asked questions
What is a scope of work in construction?
A written description of exactly what work will be performed on a project — and what will not — including materials, quantities, responsibilities, schedule and how completion is judged. Contractors price their bids against it.
Who writes the scope of work, the owner or the contractor?
Either can. On bid jobs the owner, or the owner's architect or project manager, usually writes it so every contractor prices the same work. On smaller jobs a contractor often writes it as part of the proposal; the owner should review it carefully before signing.
How should a scope of work handle hidden conditions?
State how they will be handled: the contractor documents the condition with photos, prices the fix by change order, and waits for written approval. Unit prices for likely extras, agreed in advance, keep those change orders predictable.