Using Bid Alternates on Outdoor Amenity Projects

A bid alternate lets an owner price a fixed base scope for a dog park, playground or fitness area while separately pricing add or deduct items such as shade structures, upgraded surfacing or extra stations. This protects the core project if budget falls short and lets the owner add scope quickly if funds allow, without rebidding.

Key takeaways

A base bid should represent the smallest scope the owner is fully committed to funding and building.
Add alternates price optional scope upward; deductive alternates price ways to shrink scope if the base bid comes in high.
Alternates should be listed in a fixed order of priority so award decisions are consistent and defensible.
Vague alternate descriptions are a leading cause of bid tabulation disputes and later change orders.
Every alternate needs its own line item in the bid form, not a lump-sum note buried in a proposal.

What a Bid Alternate Actually Does

A bid alternate is a separately priced item that sits outside the base bid. Bidders price the base scope and each listed alternate individually, and the owner decides after bids come in whether to include any alternates in the award. This differs from a simple wish list because the pricing is locked in at the same time as the base bid, under the same terms.

For a dog park project, a typical base bid might include fencing, grading, drainage and a single gate, with shade structures, an agility component, or a wash station priced as separate add alternates. If the budget supports it, the owner adds those items at award. If not, the base project still moves forward complete and usable.

Add Alternates vs. Deductive Alternates

Add alternates increase scope and cost above the base bid — an extra shade structure, upgraded turf, or additional fitness stations are common examples. Deductive alternates work the other direction: they identify scope that could be removed from an otherwise larger base bid if pricing comes in over budget, such as substituting a lower-cost surfacing system or reducing fencing height in a lower-risk area.

Most amenity projects lean on add alternates because owners tend to set a conservative base scope and expand it with confirmed funding. Deductive alternates are more common on larger municipal projects where the base scope is ambitious and a funding shortfall is a real possibility.

Structuring Alternates So They Are Easy to Award

Every alternate needs a clear, specific description, its own line on the bid form, and a stated priority order. Priority order matters because it tells bidders and reviewers which alternates get awarded first if only some can be funded. Without it, award decisions can look arbitrary and invite protest on public projects.

Bid item	Type	Priority
Base bid: fencing, grading, drainage, one gate	Base	Required
Alternate 1: double-gated entrance upgrade	Add	1
Alternate 2: shade structure over seating area	Add	2
Alternate 3: agility equipment package	Add	3

This structure lines up well with the scope language covered in a dog park specification writing guide, which is where most alternate descriptions originate.

Writing Alternate Scope Language That Holds Up

An alternate description needs the same level of specificity as the base bid item it modifies. "Add shade structure" invites wildly different pricing from different bidders. "Add one cantilever shade structure sized to cover the seating pad shown on sheet L-3, matching the fabric and post finish specified in the base bid" gives every bidder the same target.

This level of detail is easier to produce when the amenity submittal package is already organized. See what to include in an amenity submittal package for the documentation that supports clear alternate writing.

Evaluating Alternates During Bid Tabulation

At bid tabulation, compare base bids first, confirm the low base bidder is responsive and responsible, then layer in alternates by priority order until the available budget is used. Skipping around the priority list to chase a specific product or vendor preference is the fastest way to draw a bid protest on a publicly funded project.

The mechanics of comparing multiple proposals side by side, including alternates, are covered in bid tabulation for amenity proposals.

Mistakes That Undermine an Alternate Structure

Lumping several unrelated items into one alternate. If the owner may want the shade structure but not the agility equipment, they need separate line items.
Leaving the priority order out of the bid documents. This forces a subjective award decision after bids are already public.
Describing an alternate too loosely to price consistently. Bidders will price their own assumptions, and those assumptions will not match.
Adding alternates after bid opening. Scope changes after bids are submitted typically require a new solicitation, not a quick amendment.

A GOA project advisor can help translate a tiered wish list into a bid alternate structure that fits your procurement rules — request a quote to start that conversation.

Frequently asked questions

Can an owner reject all alternates and still award the base bid?

Yes. That is the core purpose of structuring optional scope as alternates rather than folding it into the base bid — the base project can proceed even if no alternates are funded.

Do alternates need to be awarded in the order they are listed?

On most publicly funded projects, yes. A stated priority order keeps the award process objective and defensible; skipping the order to reach a preferred item can create grounds for a bid protest.

How many alternates is too many?

There is no fixed number, but each additional alternate adds pricing complexity for bidders and evaluation complexity for the owner. Most amenity bids work well with two to five clearly defined alternates.

Should alternates be added after seeing how the base bid prices come in?

No. Alternates must be defined and included in the original bid documents so every bidder prices them under the same terms. Adding scope after bid opening generally requires a new solicitation.