How much does civil engineering cost for a Treasure Valley land development project?

It depends. Civil engineering scope and fee scale with the parcel — size, soils, topography, drainage context, irrigation easements, the city's submittal standards, and the depth of the comment-response cycle in that jurisdiction. The cost drivers are usually stormwater design, road and utility extension, and iteration with ACHD or the relevant highway district. Bailey scopes civil engineering as a fixed-fee or phased engagement after we've reviewed the parcel — every bid is custom. A 30-minute intake call gets you a real number, not a range pulled from someone else's project.

How much does land planning and entitlement work cost in Idaho?

It depends on the application stack. A preliminary plat in a city where the parcel is already correctly zoned looks nothing like an annexation + comp plan amendment + rezone + plat package with organized public opposition. Cost drivers are application types and ordering, neighborhood meetings, agency coordination depth, public hearing prep, and the political hot button in the specific city. Bailey scopes land planning per project after a feasibility review of the regulatory path. We share the bid on the intake call once we know what the parcel actually requires.

How much does commercial or industrial site design cost in the Treasure Valley?

It depends on the use, the site, and the agencies. A retail pad on a developed corner inside an existing shopping center is a different fee than a 40-acre business park requiring traffic studies, ITD coordination, utility extension, and detention sized for full impervious-surface buildout. Cost drivers are site access, parking layout, utility coordination, ITD or ACHD review, and whether the project triggers a traffic impact study. Every Bailey bid is parcel-specific — we share pricing on the intake call after we've seen the site and the use.

How much does civil engineering cost for a multifamily or mixed-use project in the Treasure Valley?

It depends on density, site size, parking type, and the city. A 40-unit garden-style apartment site in Nampa is a different fee than a 200-unit mixed-use building with structured parking in Boise. Cost drivers are residential infrastructure layout, common area design, parking solution (surface vs. structured), stormwater on a high-impervious site, and entitlement complexity if the project requires a CUP or comp plan amendment. Bailey scopes multifamily projects per parcel — we share pricing on the intake call after reviewing the site and the unit count.

FAQ · Pricing

How much does land development engineering cost in the Treasure Valley?

An honest answer for developers, realtors, and attorneys asking about Bailey's pricing across civil engineering, land planning, commercial, multifamily, and master-planned work — five service families, one rule.

By Kelli Black

COO, Bailey Engineering

Updated April 2026 · 7 min read

Quick answer

It depends on the land, the location, the size, and the situation. Bailey doesn't publish a price list because every parcel is different — soils, agencies, irrigation easements, the city's submittal cadence, the political context, and the outcomes the developer is solving for all move the bid up or down. Every engagement starts with a 30-minute intake call and a fixed-fee or phased-fee proposal scoped to the parcel — not a range pulled from someone else's project.

Why we don’t publish a price list

Every land development project is a custom problem, and a price list would lie about that. Two parcels that look identical on a county map can have wildly different engineering fees once you account for soils, slope, drainage context, irrigation easements, agency jurisdiction, the city’s current comment-response cycle, and the political hot button that will decide the entitlement.

Bailey scopes every project after we’ve actually looked at the parcel. The intake call is free, the proposal that follows is specific to the site, and the fee is either fixed or phased — not hourly with an open-ended ceiling. Below is what actually drives the cost in each of our five service families. Same rule applies to all of them: it depends, and we’ll tell you on the call.

A bid pulled from somebody else’s project tells you nothing about your project. The only useful number is the one scoped to your parcel.

Bailey methodology

Civil engineering

Civil engineering covers the structural bones of a land development project — feasibility studies, road and parking design, water and sewer systems, stormwater, irrigation, and value engineering. The fee scales with the parcel: size, soils, topography, drainage context, irrigation easements, the city’s submittal standards, and the depth of the comment-response cycle in that jurisdiction.

The biggest cost drivers in civil engineering are almost always stormwater design, road and utility extension, and the iteration cycle with ACHD or the relevant highway district. A site with shallow groundwater, an existing irrigation district facility running through it, and a 4-round Caldwell or Meridian comment cycle is a different fee than a flat infill site in Boise with curb-and-gutter streets already in place.

Land planning

Land planning is the political and procedural work — entitlements, preliminary layouts, agency coordination, neighborhood meetings, and public hearings. The fee scales with the application stack: how many application types, in what order, in which city, against which political hot button.

A simple plat in a city where the parcel is already correctly zoned and the comp plan FLUM matches the zoning is the smallest fee we write. An annexation + comp plan amendment + rezone + preliminary plat package in a city with organized public opposition, school capacity concerns, and a development agreement to negotiate is the largest. The variance can be 10x or more on the same acreage — because the work is in the process, not the parcel.

Commercial & industrial site design

Commercial and industrial work covers business parks, retail centers, industrial facilities, parking, site access, and utility coordination. The fee scales with the use, the site, and the agencies that touch it.

A retail pad on a developed corner inside an existing shopping center — utilities at the boundary, access already approved, drainage tied into the existing system — is a different fee than a 40-acre business park on raw land requiring traffic studies, ITD coordination on a state route, utility extension across an irrigation district, and detention sized for full impervious-surface buildout. The cost drivers are site access, parking layout, utility coordination, ITD or ACHD review depth, and whether the project triggers a traffic impact study.

Multifamily site design

Multifamily and mixed-use work covers apartment complexes, condominium developments, mixed-use projects, residential infrastructure, common areas, and parking. The fee scales with density, site size, parking type, and the city’s entitlement posture toward the project type.

A 40-unit garden-style apartment site in Nampa with surface parking and a straightforward CUP is a different fee than a 200-unit mixed-use building with structured parking in downtown Boise, where the project may require a comp plan amendment, design review, and infrastructure improvements that significantly change the cost equation. Cost drivers are residential infrastructure layout, common area design, parking solution (surface versus structured), stormwater on a high-impervious site, and entitlement complexity.

Master-planned communities

Master-planned community work covers large-scale planning, phased development, infrastructure master planning, multi-phase coordination, community amenities, and long-term planning. The fee scales with scale, phasing, and infrastructure model — and unlike the other service families, the engagement runs for years, not months.

A 200-acre community phased over 5 years with city water and sewer is a different engagement than a 1,500-acre community phased over 15 years with shared regional stormwater, a private water system serving multiple HOA boundaries, and a development agreement that binds entitlement to infrastructure milestones. Cost drivers are phasing strategy, shared infrastructure design, multi-phase coordination, agency relationship management across the project lifecycle, and amenity engineering.

What moves the bid up or down

Across every service family, the same factors push the fee in one direction or the other. None of them are surprises — they’re the things every experienced engineer reads off a parcel before quoting.

Site characteristics. Soils, slope, groundwater depth, floodplain, wetlands, archaeological flags. Anything that turns a screen into a study moves the bid up.
Location. Which city, which highway district, which irrigation district, which fire district. ACHD versus a Canyon County highway district versus ITD jurisdiction all carry different design standards and review timelines.
Size. Acres, lot count, unit count, square footage. Size correlates with fee, but not linearly — phasing and shared infrastructure can flatten the curve on larger projects.
Constraints. Easements, irrigation district encroachments, utility availability, school capacity ordinances (Middleton), fire response time (Nampa), comp plan FLUM mismatches.
Outcomes. What the developer is actually solving for — yield, schedule, cost certainty, or a clean exit. The engineering changes when the goal changes.
Process depth. Number of application types, number of comment-response rounds, neighborhood meeting count, public hearing risk, agency letter requirements.
Timeline. Compressed schedules with fixed deadlines (closing dates, quarterly investor meetings, agency moratorium windows) move the bid up because they reduce optionality.

Same parcel, two different developers with two different goals, two different bids. That’s normal — and it’s the reason a published price list would lie.

What the intake call looks like

Most Bailey engagements start with a 30-minute intake call with Kelli or Jonah. There’s no obligation, no high-pressure pitch, and no charge for the call itself. We’d rather tell you “this isn’t a Bailey project” on the call than waste both sides’ time on a bid we can’t deliver well.

What we cover:

The parcel. Address, acreage, current zoning, what you’re trying to build.
The regulatory path. Which application types you’ll likely need, in what order, against which city’s current political context.
The agencies. ACHD or local highway district, irrigation district, fire district, school district if residential, ITD if near a state route.
The constraints. Anything we can spot from the call that changes the math — irrigation easements, shallow groundwater, school capacity concerns, comp plan FLUM mismatches.
The fit. Whether this is the kind of project Bailey does well, or whether you’d be better served by a firm with a different specialty.

After the call, you get a written proposal scoped to your parcel — fixed-fee for feasibility studies and most defined engagements, phased for entitlement and engineering work where the scope evolves, and a clear timeline with the cost drivers called out. That’s the bid. It is, in every case, custom.

Frequently asked questions

How much does civil engineering cost for a Treasure Valley land development project?: It depends. Civil engineering scope and fee scale with the parcel — size, soils, topography, drainage context, irrigation easements, the city's submittal standards, and the depth of the comment-response cycle in that jurisdiction. The cost drivers are usually stormwater design, road and utility extension, and iteration with ACHD or the relevant highway district. Bailey scopes civil engineering as a fixed-fee or phased engagement after we've reviewed the parcel — every bid is custom. A 30-minute intake call gets you a real number, not a range pulled from someone else's project.
How much does land planning and entitlement work cost in Idaho?: It depends on the application stack. A preliminary plat in a city where the parcel is already correctly zoned looks nothing like an annexation + comp plan amendment + rezone + plat package with organized public opposition. Cost drivers are application types and ordering, neighborhood meetings, agency coordination depth, public hearing prep, and the political hot button in the specific city. Bailey scopes land planning per project after a feasibility review of the regulatory path. We share the bid on the intake call once we know what the parcel actually requires.
How much does commercial or industrial site design cost in the Treasure Valley?: It depends on the use, the site, and the agencies. A retail pad on a developed corner inside an existing shopping center is a different fee than a 40-acre business park requiring traffic studies, ITD coordination, utility extension, and detention sized for full impervious-surface buildout. Cost drivers are site access, parking layout, utility coordination, ITD or ACHD review, and whether the project triggers a traffic impact study. Every Bailey bid is parcel-specific — we share pricing on the intake call after we've seen the site and the use.
How much does civil engineering cost for a multifamily or mixed-use project in the Treasure Valley?: It depends on density, site size, parking type, and the city. A 40-unit garden-style apartment site in Nampa is a different fee than a 200-unit mixed-use building with structured parking in Boise. Cost drivers are residential infrastructure layout, common area design, parking solution (surface vs. structured), stormwater on a high-impervious site, and entitlement complexity if the project requires a CUP or comp plan amendment. Bailey scopes multifamily projects per parcel — we share pricing on the intake call after reviewing the site and the unit count.
How much does it cost to engineer a master-planned community in Southern Idaho?: It depends on scale, phasing, and infrastructure model. A 200-acre community phased over 5 years is a different engagement than a 1,500-acre community phased over 15 years with shared regional stormwater, a private water system, multiple HOA boundaries, and a development agreement that binds entitlement to infrastructure milestones. Cost drivers are phasing strategy, shared infrastructure design, multi-phase coordination, agency relationship management across the lifecycle, and amenity engineering. Bailey scopes master-planned engagements per project — we share pricing on the intake call after reviewing the parcel and the phasing concept.

Want a real number on your parcel?

Most engagements start with a 30-minute intake call. We review the parcel, confirm the regulatory path, and follow up with a fixed-fee or phased proposal scoped to your project.

Schedule an intake call →