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AI-powered BOQ calculator · Sri Lanka

How much will your house cost to build?

Describe your house and explore an indicative estimate, down to concrete and steel quantities. This data-informed planning tool draws on Structa’s experience across more than 2,000 projects and a selected historical priced residential dataset. It is not a measured BOQ or a current tender quote.

New to the calculator? Read the step-by-step guide

Sri Lanka’s first question before building

What might my house cost?

Developed with AI assistance; the estimate itself is calculated from historical priced project data and your inputs—not generated by an AI model.

Try it, then share your estimate

Your house

Storeys

Roof-top room / terrace floor optional sq ft A stair tower or covered room on the roof. Counted at half weight, as in Structa BOQs.

Total floor area —

Bathrooms

Bathrooms With shower cubicle

Roof

Flat concrete roofSlab with waterproofing Slab + Calicut tile roofTiles on timber over the slab Slab + metal sheet roofZn-Al sheets on steel purlins

Roof area sq ft Defaults to the top-floor area. Increase it for wide eaves.

Site Soil filling depth Imported soil needed to raise the ground floor. Structa BOQs assume 2 ft.

Finish level

Extras Boundary wall and gate Site security Structa design package Contingency A reserve for changes and surprises during construction. Price increase until you build

Portfolio-informed estimate · 2,000+ project experience

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Build + finish / sq ft—

Construction work—

Materials & fittings—

Extras & reserves—

Get an exact BOQ on WhatsApp

For a clean PDF, choose “Save as PDF” and turn off your browser’s “Headers and footers” print option.

Or call +94 77 889 2892 · hello@housedesign.lk

Where the money goes

Share of the estimate by trade.

Payments by construction stage

Roughly when each part of the money is needed, excluding extras and reserves.

Key quantities

Quantities for your house, scaled from Structa’s measured BOQs.

Indicative itemised estimate

work lines. Quantities scale with your inputs; unit rates come from historical priced project data and should be refreshed before use.

Compare finish levels

The same house at each finish level.

How this estimate is built

Rates used

Not included

Land, legal fees, and local-authority approval fees.
Soil investigation and special foundations such as piles. Weak ground needs an engineer’s assessment.
Ceilings. Structa’s standard finish is a painted concrete soffit.
Air conditioning, solar panels, landscaping, furniture and kitchen appliances.
Swimming pools and other one-off features.

Common questions

Structa Engineering and Contractors (Pvt) Ltd · Colombo 03 · ISO 9001:2015 certified

This calculator gives an early estimate. Your exact price comes from a BOQ prepared for your drawings and site.

Estimated cost—

See breakdown ↓

INDICATIVE PLANNING ESTIMATE

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Prepared with Structa’s experience across 2,000+ projects and a selected historical priced residential dataset. This is not a quotation or measured BOQ.

Your project assumptions

Budget by work category

Work category	Estimated amount (LKR)

How to use this estimate

The figures are data-informed planning allowances based on historical residential pricing. Site conditions, engineering design, authority requirements, material choices and current procurement rates can change the final price. The displayed ±25% band is illustrative, not a prediction or guarantee. Ask Structa for a site-specific measured BOQ before committing funds.

From a budget to a buildable plan

Structa coordinates house planning, architectural design and 3D visualisation, structural engineering, interiors, electrical and plumbing drawings, approval documentation and bills of quantities.

Discuss your project: +94 77 889 2892 · hello@housedesign.lk · housedesign.lk/contact-us/