Division 13 · Special construction
Special construction estimating for facilities that do not fit a standard template
Clean rooms, freezers, X-ray vaults and natatoriums behave nothing like ordinary buildings, and their prices are not found in a square foot database. Most of the cost sits inside vendor systems, tight tolerances and performance tests. LEEDS estimators separate the proprietary package from the surrounding construction, reconcile each quote to the drawings and specifications, and price the integration work that usually slips between trades.
13CSI Division covering specialized buildings and engineered systems
- 5.0 Google
- 4.9 Trustpilot
- 4.9 Clutch
Scope of takeoff
Special construction scope we quantify
Each facility type is broken into the vendor system, the supporting construction and the testing that proves it works.
Pre-engineered metal buildings
Frames, panels, trims, insulation and erection for storage, hangars and fabrication shells
Supplier package and foundation plans
Clean room envelopes
Modular wall and ceiling panels, sealed doors, pass-through chambers, flooring and gowning rooms
Room plans and cleanliness class schedule
Clean room air handling
HEPA and ULPA filter coverage, fan filter units, pressure controls and particle monitoring
Mechanical plans and air change criteria
Cold storage envelopes
Insulated panels, vapor barriers, freezer doors, vestibules and under-slab heating
Panel layouts and refrigeration specifications
Refrigeration interface
Evaporators, piping supports, condensate lines, floor drains and electrical rough-in at the envelope
Refrigeration plans and equipment schedule
Radiation shielding
Lead-lined drywall, heavy concrete walls, shielded doors, view windows and duct penetrations
Physicist shielding report and wall sections
Aquatic facilities
Pool shells, gutters, decks, filtration, chemical feed, slides and natatorium dehumidification
Pool plans and mechanical room details
Air-supported and fabric structures
Membranes, anchor trenches, inflation fans, airlocks and back-up power for sports domes
Structure supplier package
Sound and vibration control
Isolation floors, double wall assemblies, acoustic doors, isolators and sealed penetrations
Acoustical consultant specifications
Special purpose rooms
Vaults, studios, observatories, kennels and anechoic chambers with unique finishes and utilities
Plans and Division 13 specifications
Specialty system integration
Structural support, power, drainage and controls interfaced with vendor equipment
Coordination with vendor shop drawings
Testing, certification and commissioning
Smoke tests, pressure decay, particle counts, shielding surveys and pool chemistry startup
Specification testing requirements
Estimate types
What type of special construction estimating can you get?
Match the estimate to where your project is. Every option is priced as a flat fee before work begins.
Vendor package reconciliation
Side-by-side review of supplier quotes against drawings and specifications, listing inclusions, exclusions and the extra scope required to make bids comparable.
Accuracy
±5%
Turnaround
2 days
Best for
General contractors buying specialty systems
98%
takeoff accuracy on awarded projects
Why LEEDS
Why contractors switch to LEEDS
An estimating desk that behaves like an extension of your team, not a software subscription.
We separate the specialty supplier package, from the supporting construction so no scope falls between vendor and trade.
Every vendor quote is checked for delivery, hoisting, erection, startup and certification, and missing items are added to the estimate.
Performance requirements such as ISO class, freezer temperature or shielding thickness drive the quantities, not generic square foot rates.
Radiation shielding is estimated from the physicist's report, with wall thickness, lead equivalence and penetration treatments itemized.
Cold storage estimates include under-slab heating, vapor barrier continuity and vestibule scope that often gets overlooked.
Testing and commissioning costs are carried, as explicit lines so they are in the bid and the schedule.
Process
How our estimating process works
Four steps from upload to a bid-ready estimate, with a senior estimator signing off before anything leaves our desk.
- 1
Upload plans and scope
Send your drawings, specifications and bid invitation through the secure upload form. We confirm scope, deadline and a fixed price within two business hours.
- 2
Digital quantity takeoff
Estimators measure every item from calibrated plans in Bluebeam and PlanSwift, color-coding each layer so quantities can be traced back to the drawing.
- 3
Pricing and labor
Quantities are priced with location-adjusted material costs, crew productivity rates and equipment, then marked up to your overhead and profit targets.
- 4
Senior review and delivery
A second estimator audits quantities and pricing, documents assumptions and exclusions, and delivers your Excel workbook, PDF summary and marked-up plans.
Overview
Estimating buildings defined by performance, not form
CSI Division 13 holds the building types and systems whose cost is driven by a performance requirement: cleanliness class, temperature, pressure, radiation attenuation, water chemistry or acoustic isolation. The scope usually includes a specialty supplier package such as insulated panels, lead-lined walls, pool shells and filtration, or a fabric membrane with air supply. That package is only part of the work, and often the smaller part.
The rest is the construction that makes the system work. A freezer needs an under-slab heating system to prevent frost heave, vapor barriers and a vestibule. A clean room needs sealed penetrations, HEPA coverage, pressure cascades and monitoring. A linear accelerator vault needs poured walls up to seven feet thick, shielded doors and ducts routed with offsets. We quantify these interfaces and assign them to the right trade.
Quotes are compared on an equal basis. We list what each vendor includes and excludes: delivery, hoisting, erection, commissioning and certification, then add the missing items to the estimate. The result is a clear division of responsibility between the supplier, your crews and other subcontractors, with the risk of unassigned scope removed.
Deliverables
What's included in your estimate package
Every deliverable is formatted so it can go straight into a proposal, a purchase order or an owner report.
- XLSX
Estimate workbook
Quantities, unit costs, labor hours and totals organized by CSI division, with subtotals, markups and a bid summary tab.
- PDF
Marked-up plans
Color-coded takeoff drawings showing exactly where every measured quantity came from.
- XLSX
Material procurement list
Consolidated material quantities with waste factors applied, ready to send to suppliers for quotes.
- XLSX
Labor hours by task
Crew-based labor hours and productivity rates so you can check the schedule against the estimate.
- PDF
Assumptions and exclusions log
Every clarification, allowance and exclusion documented so your proposal scope is defensible.
- PDF
Bid summary sheet
A proposal-ready one-page summary with overhead, profit, bonds and contingency applied.
Clients
Who relies on our estimates
From single-trade subs to national developers, every client gets the same measured-twice standard.
Reviews
What contractors say after their first bid with us
What general contractors, subcontractors and developers say after bidding with our numbers.
“We use LEEDS for independent bid reviews on every multifamily deal. Their preliminary numbers have landed within 6% of final GMP on three projects in a row.”
Priya Raman
Development Manager, Northgate Partners · Denver, CO
“Squares, underlayment, flashing lengths, fastener counts, even the ridge vent. The waste factors were right for the roof pitch. Bid-ready out of the box.”
Greg Lindqvist
Estimator, Summit Roofing Co. · Kansas City, MO
“Duct takeoff by gauge and size, equipment schedules, hangers, insulation. They understand sheet metal. Turnaround was 36 hours on a 90,000 square foot clinic.”
Tom Beaulieu
President, Beaulieu Mechanical · Minneapolis, MN
Project types
Project types we estimate
The same measured-twice standard applies whether the scope is a tenant improvement or a ground-up campus.
FAQ
Special Construction Estimating FAQs
What does Division 13 special construction include?
Division 13 covers buildings and systems with unusual performance needs, including pre-engineered structures, clean rooms, cold storage, radiation protection, aquatic facilities, air-supported structures and sound or vibration control. Some project types are now spread across other divisions, but the estimating challenge is the same: specialized systems and tight integration.
How do you estimate clean room construction?
We measure wall and ceiling modules, doors, flooring and pass-throughs by room class, then add air handling, HEPA coverage, pressure controls and monitoring. Sealed penetrations, utilities and certification testing are carried separately so the estimate reflects the true cost of meeting the cleanliness class.
Can you price radiation shielding from a physicist's report?
Yes. We use the report's thickness and material requirements to quantify poured concrete, lead sheeting or gypsum board, shielded doors, view windows and penetrations, and we coordinate with structural drawings for the loads heavy shielding walls add to slabs and footings.
Do you handle vendor quotes for specialty systems?
We review quotes against drawings and specifications, identify exclusions such as unloading, erection, anchors or startup, and add the missing scope. This gives you a fair comparison between suppliers and a clear picture of the true installed cost.
Can you estimate a cold storage facility with an under-slab heating system?
Yes. We quantify the insulated slab build-up, heating conduits or glycol loops, vapor barriers, panels, freezer doors and refrigeration interfaces. Under-slab systems are priced separately because they are critical for frost heave prevention but are frequently overlooked.
How quickly can you deliver a special construction estimate?
Vendor reconciliations are often ready in two days, and detailed estimates take four to five depending on complexity and drawing volume. We confirm the schedule before starting and can expedite for bid dates when documents are complete.
Related
Related estimating services
Most projects need more than one trade. Bundle them into a single upload and we price the whole scope together.
Blog
Insights from the estimating desk
Practical guidance on bidding, takeoffs and protecting margin.
Ready for a special construction estimating quote?
Upload your plans and get a fixed quote within 2 business hours. Most estimates are delivered in 24–48 hours.