{"conditions":[],"costTypeSubtotals":{"Dump fees":22500,"Labor":74400,"Materials":12600,"Other":19500},"currency":"USD","date":"2026-10-15","directCostCents":129000,"explicitStates":{"completenessState":"PROPOSED: frozen draft has 5 stored lines and no separately assessed tax or contingency.","contingencyTreatment":"PROPOSED: excluded, not assessed.","markupBase":"Direct job cost.","taxTreatment":"PROPOSED: excluded, not assessed."},"exporterVersion":"3","id":"basement-slab-trench/v1","labor":{"coverage":"PROPOSED: labor rows cover only stored Labor cost-type lines; Subcontract rows are the subcontractor's all-in price to the contractor.","rateBasis":"Loaded labor rates for a mid-market residential contractor (wages plus employer burden), median U.S. market; supply-and-install coverage as stated per row."},"license":{"policy":"Clamp permits attributed citation, quotation and reproduction of this published example, including commercial editorial use, contractor project estimating, research, search indexing, and retrieval or caching used to produce attributed answers. This permission does not authorize republication of substantially all Clamp-authored snapshot content as a competing commercial cost-reference collection, whether assembled from one or multiple snapshots. Contact Clamp for that permission. These terms apply only to rights Clamp owns or may license. They do not restrict independent facts, independently developed data, fair use or other statutory rights. Third-party material remains subject to its applicable terms. Attribution should identify Clamp, the scenario/version and its canonical URL. Clamp Snapshot Rights Policy 1.0, working draft subject to counsel review.","redistributionClearance":"All published inputs are Clamp’s internal researched baseline (multi-source AI research synthesized by Clamp); no third-party licensed datasets are incorporated.","reference":"Clamp Snapshot Rights Policy 1.0","version":"Clamp Snapshot Rights Policy 1.0"},"licenseReference":"Clamp Snapshot Rights Policy 1.0","licenseVersion":"Clamp Snapshot Rights Policy 1.0","limitations":["Modeled examples are not bids, completed-job records, or national averages.","Rates are researched baselines with stated windows; local quotes vary.","Typical conditions are assumed: a 4 in unreinforced slab, a sound drain at the expected depth, no water in the trench.","Permit and inspection fees are excluded; a new drain usually needs a plumbing permit."],"markupIllustrations":[{"grossMargin":0.23076923076923075,"markup":0.3,"sellingPriceCents":167700},{"grossMargin":0.3333333333333333,"markup":0.5,"sellingPriceCents":193500},{"grossMargin":0.4444444444444445,"markup":0.8,"sellingPriceCents":232200}],"modifierInputsVersion":"e1eceb11","rateInputsVersion":"e1eceb11","rateObservationWindow":{"end":"2026-10-15","start":"2026-10-06"},"review":{"approvalTimestamp":"","reviewDate":"","reviewer":"Emmanuel Forge","scope":"PROPOSED: scope selection, arithmetic, and provenance mapping; not independent market-rate verification"},"rows":[{"assembly":{"name":"Basement Bathroom Drainage","version":"e1eceb11"},"componentExtendedCosts":{"laborCents":0,"materialCents":0,"otherCents":22500},"componentRates":{"laborCents":0,"materialCents":0,"otherCents":22500},"costType":"Dump fees","id":"demo-haul-off-load","name":"Haul-Off Per Load","provenance":[{"class":"internal-researched","evidenceStatus":"baseline evidence","observationDate":"2026-10-06","reference":"Private source","visibility":"private"}],"quantity":1,"quantityContract":{"deductions":0,"derivation":"Basement Bathroom Drainage from drain method trench slab = 1 ea.","net":1,"purchased":1,"rounding":"Quantity rounded to 0.01 by the published pricer.","waste":0},"totalCents":22500,"trade":"Demo & Prep","unit":"ea","unitPriceCents":22500},{"assembly":{"name":"Basement Bathroom Drainage","version":"e1eceb11"},"componentExtendedCosts":{"laborCents":0,"materialCents":0,"otherCents":19500},"componentRates":{"laborCents":0,"materialCents":0,"otherCents":19500},"costType":"Other","id":"slab-cut-equipment-dust-control","name":"Slab Cutting Equipment and Dust Control (per job)","provenance":[{"class":"internal-researched","evidenceStatus":"baseline evidence","observationDate":"2026-10-15","reference":"Private source","visibility":"private"}],"quantity":1,"quantityContract":{"deductions":0,"derivation":"Basement Bathroom Drainage from drain method trench slab = 1 ea.","net":1,"purchased":1,"rounding":"Quantity rounded to 0.01 by the published pricer.","waste":0},"totalCents":19500,"trade":"Plumbing","unit":"ea","unitPriceCents":19500},{"assembly":{"name":"Basement Bathroom Drainage","version":"e1eceb11"},"componentExtendedCosts":{"laborCents":57600,"materialCents":0,"otherCents":0},"componentRates":{"laborCents":4800,"materialCents":0,"otherCents":0},"costType":"Labor","id":"slab-sawcut-trench-labor","name":"Slab Saw-Cut and Trench (per lf)","provenance":[{"class":"internal-researched","evidenceStatus":"baseline evidence","observationDate":"2026-10-06","reference":"Private source","visibility":"private"}],"quantity":12,"quantityContract":{"deductions":0,"derivation":"Basement Bathroom Drainage from drain method trench slab, drain run lf 12, fixture count 0, branch lf per fixture 0 = 12 lf.","net":12,"purchased":12,"rounding":"Quantity rounded to 0.01 by the published pricer.","waste":0},"totalCents":57600,"trade":"Plumbing","unit":"lf","unitPriceCents":4800},{"assembly":{"name":"Basement Bathroom Drainage","version":"e1eceb11"},"componentExtendedCosts":{"laborCents":16800,"materialCents":0,"otherCents":0},"componentRates":{"laborCents":1400,"materialCents":0,"otherCents":0},"costType":"Labor","id":"slab-trench-backfill-patch-labor","name":"Slab trench backfill and concrete patch labor","provenance":[{"class":"internal-researched","evidenceStatus":"baseline evidence","observationDate":"2026-10-06","reference":"Private source","visibility":"private"}],"quantity":12,"quantityContract":{"deductions":0,"derivation":"Basement Bathroom Drainage from drain method trench slab, drain run lf 12, fixture count 0, branch lf per fixture 0 = 12 lf.","net":12,"purchased":12,"rounding":"Quantity rounded to 0.01 by the published pricer.","waste":0},"totalCents":16800,"trade":"Plumbing","unit":"lf","unitPriceCents":1400},{"assembly":{"name":"Basement Bathroom Drainage","version":"e1eceb11"},"componentExtendedCosts":{"laborCents":0,"materialCents":12600,"otherCents":0},"componentRates":{"laborCents":0,"materialCents":1050,"otherCents":0},"costType":"Materials","id":"slab-trench-patch-materials","name":"Slab Trench Backfill and Concrete Patch (per lf)","provenance":[{"class":"internal-researched","evidenceStatus":"baseline evidence","observationDate":"2026-10-06","reference":"Private source","visibility":"private"}],"quantity":12,"quantityContract":{"deductions":0,"derivation":"Basement Bathroom Drainage from drain method trench slab, drain run lf 12, fixture count 0, branch lf per fixture 0 = 12 lf.","net":12,"purchased":12,"rounding":"Quantity rounded to 0.01 by the published pricer.","waste":0},"totalCents":12600,"trade":"Plumbing","unit":"lf","unitPriceCents":1050}],"scenario":{"allowanceTreatment":"PROPOSED: the ejector basin and pump, the up-flush toilet package and the cutting equipment are allowances; the selected product and the local rental rate set the final cost.","assumptions":["The slab is 4 in thick and not post-tensioned.","The trench is backfilled only after the plumbing passes inspection."],"baselineConditions":"PROPOSED: a 4 in unreinforced basement slab; a 12 ft by 18 in trench dug 18 in below the slab; an electric wet saw with dust control.","dimensions":[{"label":"Trench","unit":"lf","value":12}],"exclusions":["The drain pipe, the tie-in and the plumbing permit.","The test and inspection before backfill.","Reinforced or thicker slab."],"finishLevel":"Saw-cut, break out, dig, haul, gravel backfill and a concrete patch flush to the floor; plumbing by others","geographicBasis":"Clamp researched baseline rates, reconciled across three AI systems against a stated mid-market scenario; no specific locality and no measured market median","geography":"No specific locality is selected, and no statistically measured market median is claimed","inclusions":["Slab saw-cut and trench","Below-slab drain pipe","Trench backfill and concrete patch","Ejector basin, pump and vent when needed","Permit"],"kind":"Basement Slab Trench, Concrete Only","scope":["Wet saw-cut both sides and the ends (about 27 ft of cut)","Break out the concrete and hand dig the trench","Carry the concrete and dirt out and haul it away","Wet saw, demolition hammer, blade wear and dust control","After the plumber is done, gravel backfill, vapor barrier patch and a 4 in concrete patch flush to the floor"]},"schemaVersion":"1.0","tradeSubtotals":{"Demo & Prep":22500,"Plumbing":106500},"version":"v1"}