An estimate can name a drain route while leaving its destination unconfirmed. Before authorizing construction, ask what you are paying for if the proposed outlet proves unavailable. Separate the cost of finding out from the cost of building a system that depends on that answer.
Identify The Assumption In The Price
Ask the bidder to mark the proposed endpoint on a drawing and state which fact remains open: the receiving system's identity, access rights, authority permission, physical condition or design suitability. Have the provider explain how the uncertainty affects the price and which work must wait.
Fairfax County's stormwater guidance distinguishes county, roadway and private drainage responsibilities and explains that drainage easements involve defined access and maintenance rights. That is a local example of why a nearby pipe cannot simply be treated as an available connection. It does not determine rights or approval for a property outside Fairfax County. Use the authority responsible for the actual location.
Compare The Cost Of Reaching A Decision
Ask each bidder to complete this record before comparing construction totals. The entries are questions, not technical instructions or a model contract.
Swipe or scroll sideways to compare every column. Keyboard users can focus the table area and use the arrow keys.
| Decision Stage | Deliverable To Request | Price Or Authorization Question |
|---|---|---|
| Initial investigation | Written finding about the proposed outlet and remaining uncertainty | What investigation is included, and what requires another fee? |
| Authority or owner response | Record of the actual response and its limits | Who seeks it, and is that work included? |
| Outlet usable for the proposed design | Revised scope tied to the verified route | What must be approved before construction starts? |
| Outlet unavailable or unsuitable | Explanation of the finding and separately proposed alternatives | What is owed for completed assessment, and what remains uncommitted? |
| Alternative design | New route, dependencies and itemized proposal | Who authorizes the new scope and any further investigation? |
Keep the original estimate as well as each revision. A request for a connection is not an approval, and an approval alone does not establish that the contractor has confirmed the physical condition or designed the complete route.
Compare Two Different Failure Outcomes
Illustrative comparison: Bid A includes an assessment and written findings before a construction decision. Bid B quotes construction on the assumption that an existing connection can be used, but leaves redesign and further investigation unpriced. If that connection is unavailable, the two totals no longer describe the same purchase.
Ask both bidders to explain what you receive and what you owe if the project stops after investigation. Ask whether any deposit covers assessment, reserved materials or construction, and obtain the actual terms for unused amounts. This article does not establish a cancellation or refund entitlement.
Write Down Who Can Approve The Alternative
Do not leave “choose another outlet” as an open instruction to a crew. Identify who prepares the revised design, obtains necessary permissions and presents the new price to the authorized decision-maker. Ask how any disturbed ground will be made safe if authorized investigation ends without a construction agreement.
The FTC recommends written estimates describing work, materials, timing and price. Apply that principle to the investigation and later construction as separate decisions. Keep local approval records with the accepted proposal, and resolve any claim about a neighbor's land or public infrastructure with the responsible authority or adviser.
This worksheet supplements LocalServ's wider drainage and basement-waterproofing coverage. It helps compare conditional spending; it does not design a drainage system, authorize discharge or guarantee a dry basement.
Sources And Local Resources
Sources checked November 9, 2026. Confirm current requirements with the authority responsible for your property.
- Fairfax County: Stormwater FAQslocal maintenance responsibilities and easement context; not nationwide permission rules.
- FTC: How To Avoid A Home Improvement Scamwritten estimate scope, materials, timing and price. Decision-stage worksheet and fictional comparison are LocalServ planning aids.