Project WHA8WE

Residential complex with 8 flats, estimated against the client’s bill-of-quantities template.

A real permit plan, anonymised. BauKIT produced the quantity takeoff from it, then filled in and priced the client's bill-of-quantities template.

Current download package →

The input

One sheet of permit plan and the client’s requirements.

Floor plans of basement, ground and upper floor, four sections, four elevations, roof plan and site plan, all on one sheet at 1:100. No CAD model, no structural calculation, no soil report.

The client's bill-of-quantities template with 245 items
The client's reinforcement table (kg per m² or m³ of element)
Total construction time of 51 weeks
Manufacturer and special items left unpriced; the client applies its own purchase prices

Permit plan of the residential complex with 8 flats: floor plans, sections, elevations and site plan on one sheet (anonymised)

Plan author, applicant and landowners have been removed.

The quantity takeoff

Where each of the 39 quantities comes from.

Every quantity carries its calculation, its place in the plan and a confidence class. BauKIT had to assume only two quantities because the plan does not provide them, and says why in each case. In the bill of quantities, each of the 249 items carries its calculation as well.

PLAN: 5of 39
labelled directly in the plan
HERLEIT: 32of 39
derived from plan dimensions, formula shown
ANNAHME: 2of 39
not in the plan, assumed with a reason

Work	Quantity	Calculation / derivation	Source (plan)	Class
Floating heated screed 7 cm (build-ups D01/D02/D03)	422.32 m²	2 × (2 × 65.04 + 2 × 40.54) = 422.32, matching the net living area in the area schedule (422)	Area schedule, net living area per flat; build-ups D01/D02/D03	PLAN
Precision clay block masonry 38 cm (AW02 Porotherm 38)	403.97 m²	Ground floor left 48.62 × 2.50 − 25.31 + ground floor right 48.62 × 2.40 − 24.25 + upper floor 2 × 48.62 × 2.80 − 56.98 = 403.97; openings over 0.5 m² deducted (ÖNORM B 2204)	Wall axis 48.62 m per building block from the dimension chains; heights from section 02-01; opening schedule	HERLEIT
Strip topsoil 30 cm and store on site	201.53 m³	(924 − 252.22) × 0.30 = 201.53	NOT IN PLAN: topsoil depth not stated, no soil report; 30 cm based on the plan note “Humus 30cm”	ANNAHME

Three rows from the quantity takeoff, shortened and translated.

Review notes

What BauKIT left open, and why.

The quantity takeoff ends with 16 review notes. They state which documents are missing, what was assumed as a result, and which items need recalculating once those documents exist. After them come 51 items for which a supplier price still has to be obtained. Five of the review notes:

No structural calculation supplied

Reinforcement was calculated from the client's reinforcement table. BauKIT also states how much the slab reinforcement would drop with precast element slabs and asks for the structural calculation and slab system to be confirmed.

No soil report

Excavation class, bearing capacity and groundwater level are unknown. Disposal is priced as clean excavated soil; dewatering for the basement is not in the bill of quantities and is reported as open.

Building-services interface unclear

There are no building-services drawings. Chases, openings, core drillings and pipe penetrations are entered as assumptions and need agreeing with the mechanical and electrical trades.

Permit plan, not construction drawings

The estimate is based on the 1:100 permit plan, using dimension chains and area stamps. Where no dimensions are given, for example for the 12 cm internal walls, BauKIT measured in the drawing and says so.

Contradictions between plan and template

Six places where the plan and the bill-of-quantities template do not match are listed one by one. One example: an internal wall is 15 cm thick in the plan, while the template only has a 17 cm item.

The estimate

€1,470,790 net for the master builder’s scope.

This is a partial estimate, not a turnkey construction cost. The client’s template covers master builder works, external insulation, site connections and external works. Windows, roofing and sheet-metal work, building services, electrical work and PV are not included, so no cost per m² of gross floor area can be derived from it.

56 items are left without a unit price: 51 manufacturer and special items at the client’s request, and five scaffolding and temporary-works hire items where the catalogue price does not fit the template. The quantities are measured; the client applies its own purchase prices. They are not included in the total.
Provisional and alternative items worth €39,121 net are listed separately and are not in the total either.
Unit prices are catalogue benchmarks, not a contractor’s own pricing.

Net by work group

07Concrete and reinforced concrete€532,720 · 36.2 %
01Site overheads€373,070 · 25.4 %
10Plaster and render€156,392 · 10.6 %
08Masonry€78,203 · 5.3 %
12Waterproofing€61,777 · 4.2 %
04Scaffolding€49,760 · 3.4 %
11Screed€46,989 · 3.2 %
06Site connections and infrastructure€37,524 · 2.6 %
…Remaining 8 work groups€134,355 · 9.1 %

Check it yourself

The current download package is project WA16WE.

A residential complex with 16 flats and an underground car park, estimated turnkey: three permit plans, quantity takeoff, room and opening schedules, priced bill of quantities and ONLV file.

Go to project WA16WE →