Sitework and excavation
Cut and fill on sloped lots, export haul-off, shoring and dewatering for wet-season Clackamas County excavation.
CY · LF · TONWe prepare line-item construction estimates and quantity takeoffs for builders, subs and owners working in Lake Oswego, Clackamas County. Send plans and get an Excel and PDF estimate organized by CSI MasterFormat division in 24–48 hours.
Lake Oswego pricing turns on slope and foundation work in the hills above the Willamette, tight infill lots with limited staging, City of Lake Oswego tree and impervious-surface rules, Clackamas County permitting timelines, wet-season excavation and dewatering, and a ZIP-code-adjusted labor market tied to the Portland metro.
Lake Oswego is a built-out, hilly city where most new work is infill, teardown-rebuild and multifamily rather than greenfield subdivision. That changes what an estimate has to capture: stepped footings and retaining walls on sloped lots, engineered fill and shoring where a lot is tight, and utility relocations that a flat-lot template would miss entirely. We build takeoffs from your plan set, not from a square-foot average, so the quantities you bid are the quantities you build.
Our estimates come in Excel and PDF, organized by CSI MasterFormat division, with marked-up plan sets showing what we measured and where. Material and labor pricing is ZIP-code-adjusted for the Lake Oswego and Portland-metro market, using RSMeans data plus current supplier and subcontractor input. Turnaround is 24–48 hours for most projects, with rush available. If you are pricing work across the metro, our Oregon construction estimating team covers the surrounding cities, including Tigard and Oregon City.
For bidders. You need bid-ready quantities fast. We return division-coded takeoffs with waste factors, unit costs and clarifications so you can adjust your number before the bid date, not after.
For builders. You are buying out trades and tracking cost. We break the estimate down by CSI division and by phase, so you can compare subcontractor quotes line by line against a measured baseline.
For owners. You want a budget before design is finished. We estimate from schematic plans, flag scope gaps and give you a cost range tied to measurable quantities rather than a lump sum.
Select a bar to compare Lake Oswego with the largest Oregon markets we cover.
138 new housing units in 2025 (+475% vs 2024).
83 single-family · 55 multifamily (40%).
Lake Oswego issued permits for 138 new privately-owned residential units in 2025, up from 24 in 2024 — a 475% increase, per the U.S. Census Bureau Building Permits Survey. Of those, 83 were single-family and 55 were multifamily, so 40% of the year's units sat in apartment and townhome buildings. Permitted value was $51M, averaging $371,100 per unit. For a bidder, that mix means two different estimating problems running at once: scattered single-family infill with individual sitework, and multifamily structures where the MEP, framing and concrete packages carry the cost. Our multi-family estimating services and residential estimating services cover both, and the state page shows how Lake Oswego fits the wider Oregon market.
Lake Oswego ranked 18th of 25 covered state cities by residential units in 2025 and accounted for 1.5% of the 9,431 units permitted across those cities. That is a modest share, which matters when you are scheduling: local subcontractor capacity is limited, and the same concrete, framing and mechanical crews are also bidding work in Tigard, Oregon City and the rest of the Portland metro. Demand is being pushed by Portland-area semiconductor investment and Willamette Valley suburban growth. Builders pricing Lake Oswego work should expect trade pricing that tracks the metro rather than the city, and should confirm current permit fees and review timelines with the City of Lake Oswego building department.
We estimate the scopes that drive cost on Lake Oswego hillside, infill and multifamily projects.
Cut and fill on sloped lots, export haul-off, shoring and dewatering for wet-season Clackamas County excavation.
CY · LF · TONStepped strip footings, slab-on-grade, retaining walls and rebar priced from your structural sheets.
CY · SF · LBDimensional lumber, engineered joists, sheathing and hardware counted member by member from the framing plans.
LF · EA · BFPlumbing, HVAC and electrical rough-in quantities for multifamily and custom single-family buildings.
LF · EA · TONSlope-adjusted roof area, underlayment, flashing and WRB for steep-pitch Lake Oswego roofs.
SQ · LF · SFUnit-by-unit and common-area takeoffs for apartment and townhome projects, including amenity spaces.
SF · EA · LFPartitions, ceilings, doors, finishes and MEP modifications for tenant improvements and small commercial buildings.
SF · LF · EAWe compare subcontractor quotes against our measured baseline and flag scope gaps before you sign.
LS · EALake Oswego issued 138 new residential units in 2025, so most jobs are tight-lot rebuilds where footing, shoring and utility relocation quantities decide the bid.
55 of those 138 units were multifamily — 40% of the year's permits — so you are pricing podiums, tuck-under parking and Type III or V over concrete on constrained sites.
83 single-family units permitted in 2025, most on sloped lots above the lake, means stepped foundations, tall retaining walls and long concrete runs you cannot price from a square-foot average.
A built-out city replaces rather than subdivides, so second-story additions, kitchen and structural remodels need selective demo and temporary shoring quantities measured wall by wall.
If you bid concrete, framing, roofing or mechanical scope in Clackamas County, you need division-level quantities to check against the GC's bid form before the deadline.
Schematic-stage budgets tied to measurable quantities let you test a design against a real cost range before you commit to construction documents and a permit submittal.
We estimate projects throughout Lake Oswego and the surrounding Clackamas, Washington and Multnomah County communities. Plans come to us as PDFs, and marked-up sets go back the same way.
The 2025 permit mix in Lake Oswego was 83 single-family units and 55 multifamily units, with a combined permitted value of $51M. That is the work we price most: rebuilds, small multifamily and the sitework that comes with both.
Demolition, erosion control, engineered fill and a new stepped foundation on a lot that was graded decades ago. We measure demolition by volume and foundation concrete by footing and stem-wall runs, not by floor area.
Watch for: Demo debris volume, undocumented fill, existing utility locations.
Three- to twelve-unit buildings, often with tuck-under or podium parking. We take off unit-by-unit so you can see the per-unit cost spread and compare it against the $371,100 average permitted value per unit reported for 2025.
Watch for: Fire separation assemblies, parking ventilation, per-unit MEP counts.
Sloped lots above the lake drive retaining wall, shoring and drainage quantities. We measure wall length, height and backfill separately, because those three lines move the concrete and excavation numbers more than the house itself.
Watch for: Shoring depth, wall height steps, footing embedment.
Second-story additions, structural remodels and kitchen and bath gut work in First Addition and Lake Grove. Selective demolition, temporary shoring and tie-in to existing framing are measured as separate line items.
Watch for: Existing framing size and spacing, header spans, temporary shoring.
Detached and attached ADUs on existing residential lots, usually with their own utility trench and sometimes their own service. We price the trench, meter and panel as separate scope so the utility line does not disappear into the sitework total.
Watch for: Utility trench length, separate service, driveway apron.
Small office, retail and light industrial buildings along the Highway 43 and Kruse Way corridors. Tenant improvements and shell work are taken off by CSI division so the landlord and tenant scopes stay separated.
Watch for: Demising walls, rooftop unit screening, shell versus TI split.
Two bids on the same set of Lake Oswego plans can differ by more than the plans do. These are the six drivers that move the number most in this city.
Lake Oswego administers its own building permits, and the city sits in Clackamas County, so plan review, right-of-way and stormwater requirements all run through local offices rather than a single county counter. Oregon adopts the IBC and IRC with state amendments, and the adopted edition changes on a cycle. Confirm the current edition and any local amendments with the Lake Oswego building department before you lock the permit and inspection line in your estimate.
City of Lake Oswego building department · Clackamas County · Oregon state amendments to IBC/IRCMuch of the city is built on hillsides and former orchard ground, so footing design often runs to stepped footings, deeper embedment or engineered fill rather than a uniform perimeter. On tight infill lots, excavation support and shoring can be a six-figure line on their own. We measure footing and stem wall by linear run and height step, and we price excavation and backfill separately so you can see where the slope is costing you.
Stepped spread footings · Engineered fill · Excavation support and shoringWillamette Valley winters bring months of rain, which affects both schedule and cost. Erosion control, temporary stabilization, dewatering and covered work all carry real money, and concrete pours in cold, wet weather need protection and sometimes accelerators. Roof drainage, foundation drains and storm connections are frequently larger scope here than on a dry-site template, and they should be measured rather than carried as a percentage.
Erosion control and SWPPP · Foundation drainage · Temporary dewateringLake Oswego sits inside the Portland-metro labor market, where union rates and apprenticeship ratios apply to a large share of commercial and multifamily work. Residential remodel labor is largely non-union but competes with the same crews, so availability drives premiums on small jobs. We price labor from current local rates rather than a national average, and we flag trades where the crew size you assume may not be available on your schedule.
Portland-metro labor market · Union rates and ratios · Subcontractor availabilityMany lots are reached by narrow, sloping streets with no staging area, and some lakefront or steep parcels carry tree protection, slope or shoreline restrictions that limit where you can work. That changes crane and concrete pump placement, spoils haul distance and the number of small loads you pay for. We ask for the site plan and any arborist or geotechnical report, because those documents move the sitework and concrete lines more than the building plans do.
Tree protection and slope restrictions · Crane and pump placement · Spoils haul distanceConcrete, framing lumber and structural steel are all trucked in from Portland-metro suppliers, so delivery windows and small-load premiums matter on tight lots. Oregon has no statewide sales tax, but Clackamas County and the city can levy construction-related fees and system development charges that belong in the budget, not the contingency. We show material, labor and fee lines separately so you can see which one is driving the total.
Portland-metro suppliers · System development charges · Small-load delivery premiumsLake Oswego sits in Clackamas County on the Willamette River, and its mix of hillside lots, older homes, and new infill shapes what an estimator actually measures. These five trades carry the most risk on local bids.
Sloped lots and mature tree canopy drive the sitework takeoff here. You are measuring cut and fill by cross-section, not a flat pad, and adding over-excavation under footings where the geotech report calls for it. Rock excavation is a separate bid item because basalt is common in the hills above the river. Erosion control is a real line item, not an afterthought — silt fence, inlet protection, and a construction entrance get priced by linear foot and each. If your project is in the hills, our sitework estimating services break out clearing, grubbing, structural fill, and export separately so you can see the haul cost. Confirm the city's adopted erosion and grading requirements with the building department before you lock the number.
Framing takeoffs in Lake Oswego run into two patterns: older homes being remodeled or added onto, and new infill where the plan set is tight and the lot is narrow. On remodels, you cannot trust the drawings alone — you measure existing walls, note the header sizes, and carry an allowance for reframing what the demo opens up. On new construction, the takeoff is board-by-board: studs by length and spacing, plates, headers, sheathing by sheet count, and hardware by each. Engineered lumber is common on long spans and gets priced per piece with a lead-time note. Our framing estimating services return a line-item list you can hand to a lumber yard for a quote.
MEP takeoffs here are fixture-and-device counts, not allowances. You count plumbing fixtures by type and note the venting and drain runs that the code requires, especially on remodels where existing drains may not be sized for modern fixtures. Electrical is counted by device, by circuit, and by panel capacity — an older home often needs a service upgrade that shows up as a separate line. HVAC is sized by load calculation, with ductwork measured by linear foot and fitting count. Our MEP estimating services organize all three by CSI division so a mechanical subcontractor can review just their scope. Confirm the locally adopted plumbing and electrical code editions with the building department.
Foundations on Lake Oswego hillsides are rarely simple. You will see stepped footings, retaining walls, and sometimes pin piles or helical piers where the slope and soil report demand them. The takeoff has to separate wall forms by height because formwork cost per square foot of contact area climbs fast above a certain wall height. Anchor bolt templates, hold-downs, and embeds are counted, not estimated. Add a waste factor for rebar that reflects lap splices and cutoffs — typical ranges run higher on stepped walls than on flat slabs. Our foundation estimating services and concrete estimating services both price by cubic yard placed plus formwork contact area, so a change in wall height does not hide in a lump sum.
Roof pitch and complexity drive the roofing number more than square footage does. Many Lake Oswego roofs are steep, cut up with valleys and dormers, so you are counting squares, ridge and hip linear feet, valley linear feet, and step flashing by the piece. Underlayment, ice-and-water shield at eaves and valleys, and a self-adhered membrane are separate lines. Ventilation — ridge vent, soffit vent, or a powered option — gets its own line because it is often omitted and then added as a change order. Our roofing estimating services price tear-off, disposal, and deck repair separately from the new roof so you can compare bids honestly.
Quick check for a single element. For a full drawing set, send the plans and we measure everything, including the items calculators miss.
Typical waste: 3–5% for slabs, 5–10% for footings and walls. Truck count assumes 10 CY loads; confirm load size with your ready-mix supplier.
Need the full takeoff with pricing? Upload your plans.
| Section | Line item | Qty | Unit |
|---|---|---|---|
| 03 30 00 | Footing concrete, 24 in. wide x 12 in. deep | 18.5 | CY |
| 03 30 00 | Slab-on-grade, 4 in. thick | 1,240 | SF |
| 03 20 00 | Rebar, #4 and #5, incl. laps and dowels | 3,850 | LB |
| 03 11 00 | Wall formwork, 8 ft height | 1,460 | SFCA |
| 06 10 00 | 2x6 stud wall, 16 in. O.C. | 2,180 | LF |
| 06 10 00 | Engineered floor joists, 16 in. deep | 1,950 | LF |
| 07 30 00 | Roof underlayment, synthetic | 32 | SQ |
| 07 30 00 | Ice-and-water shield, eaves and valleys | 410 | LF |
This example uses illustrative dimensions. Say you are pricing a stepped continuous footing for a hillside residence. The plan shows 185 linear feet of footing at 24 inches wide and 12 inches deep, plus two interior pad footings at 36 in. x 36 in. x 12 in.
| Step | Calculation | Result |
|---|---|---|
| Continuous footing volume | 185 LF x 2.0 ft x 1.0 ft = 370 CF | 370 CF |
| Convert to cubic yards | 370 ÷ 27 | 13.70 CY |
| Pad footing volume | 2 x (3.0 x 3.0 x 1.0) = 18 CF | 18 CF |
| Pad footing in cubic yards | 18 ÷ 27 | 0.67 CY |
| Subtotal | 13.70 + 0.67 | 14.37 CY |
| Waste factor (5%) | 14.37 x 1.05 | 15.09 CY |
| Order quantity | Round up to whole yard | 16 CY |
The waste factor matters because stepped footings produce more cutoff and spillage than a flat run, and a short pour means a cold joint or a second delivery charge. On a hillside, add a line for concrete pump or chute extension if the truck cannot reach the lower footing — that is a separate cost and it is easy to miss.
Now price the formwork by contact area. The footing sides are 1.0 ft high, two faces, so 185 LF x 2 x 1.0 = 370 SFCA for the continuous footing, plus 2 x (4 sides x 3.0 ft x 1.0 ft) = 24 SFCA for the pads, totaling 394 SFCA. Formwork is priced per square foot of contact area, so a change in footing depth changes the form cost even if the concrete volume barely moves.
Finally, count the rebar. A typical detail might call for four #4 bars continuous plus #4 dowels at 16 in. on center. That is 185 LF x 4 bars = 740 LF, plus dowels at roughly 12 per footing x 2 ft = 24 LF, plus lap allowance. Convert to pounds using the unit weight of #4 bar, then add a waste factor for laps and cutoffs. If you want this level of detail on your own plans, send them through our get an estimate page and we will return a division-organized takeoff.
Sloped lots change three things: excavation quantities, foundation type, and access. You will see more cut and fill, stepped or pier-supported foundations, and sometimes a crane or pump where a truck cannot reach. Rock excavation is a real risk in the hills above the river. A takeoff that assumes a flat lot will underprice the job, so we measure the actual grades and note where a geotech report is needed.
We price labor using ZIP-code-adjusted rates from RSMeans data, and we can shift the labor basis when a project is subject to prevailing wage or a union agreement. Tell us the requirement up front — public work, a PLA, or a Davis-Bacon trigger — because it changes the labor line on every division. We do not guess at wage determinations; if you have the applicable schedule, send it with the plans.
Most projects return in 24 to 48 hours. Larger commercial or multi-family sets, or projects with a lot of addenda, take longer, and we will tell you the date when we confirm scope. Rush service is available if you have a bid deadline. Deliverables come as Excel and PDF organized by CSI MasterFormat division, with marked-up plan sets so you can see what we measured.
The permit figures come from the U.S. Census Bureau, Building Permits Survey, for permits issued by the city itself. They count new privately-owned residential units only, so they exclude commercial permits, additions, and alterations. In 2025 the city issued 138 new residential units, up from 24 in 2024, with 83 single-family and 55 multifamily units. That is a 475% change year over year, and the permitted value was $51M.
Yes, and remodels are a large share of the work here. The catch is that existing conditions rarely match the drawings, so we carry allowances for reframing, subfloor repair, and service upgrades, and we flag them clearly instead of burying them in a lump sum. If you can get us photos or a site visit report, the allowances get tighter. Otherwise we price to the plan and list what we assumed.
We keep them separate from construction cost. Permit fees, plan review, system development charges, and utility connection fees vary by jurisdiction and by project type, so we list them as a distinct section rather than blending them into division costs. That way your construction bid stays clean and your owner's budget shows the soft costs honestly. Verify current fee schedules with the city before you finalize.
PDF plan sets are ideal, and we can work from CAD or Revit files when they are available. We use Bluebeam Revu and PlanSwift for measurement and RSMeans data for pricing. If you have a specification book, addenda, or a geotech report, send those too — they change quantities. Marked-up plan sets come back with the estimate so you can check our dimensions against the drawings.
Yes. We cover the Portland metro and the Willamette Valley, including nearby cities like Oregon City, Tigard, and Albany, plus Corvallis, Keizer, and Grants Pass. Pricing is adjusted by ZIP code, so material and labor rates reflect the local market rather than a statewide average. If your project is in Clackamas County or just outside it, we can price it.
Sitework. Bidders consistently leave out rock excavation, export hauling, erosion control, and dewatering, then absorb the cost or file a change order. On hillside lots these items can swing the budget by a wide margin. We break them out as separate lines so you can see the exposure before you sign a contract, not after the excavator hits basalt.
Yes. Multifamily made up 40% of the new residential units permitted in 2025, so it is a real part of the local market. We price those projects by building type and unit mix, with separate divisions for structure, envelope, MEP, and sitework, and we carry unit-count-driven quantities for fixtures, devices, and finishes. Our multi-family estimating services page explains the format in more detail.
Upload your plan set and we will return a division-organized takeoff with marked-up drawings, usually within 24 to 48 hours.