Project Intelligence · Bengaluru · Updated 2026-08-17
30×40 House Construction Cost Estimator — Bengaluru
The definitive way to budget a 30×40 build: pick floors and quality tier, toggle borewell and compound work, and see the full derived cost — structure, finishes, MEP, approvals, GST and contingency — not a one-line per-sqft guess.
Essential
₹42 – 69 lakh
Standard
₹47 – 78 lakh
Premium
₹57 – 99 lakh
For a typical configuration — adjust every parameter below. Indicative, confirmed after site assessment.
- Written scope & quotation before any commitment
- One accountable coordinator, start to finish
- Screened execution professionals
- Stage-by-stage payments, reviewed before the next stage
- We never sell your requirement to contractors
The 30×40 (1,200 sqft) site is Bengaluru's default plot, and per-sqft headlines are the default way budgets go wrong on it. This estimator prices your build the way a good contractor does: buildable area from setbacks (~950 sqft per floor), quantities from your configuration, researched 2026 unit rates per quality tier, then the costs the per-sqft ads leave out — approvals, utilities, borewell, compound wall, GST and an honest contingency.
The breakdown reads like a contractor's actual bill of quantities: steel in kilograms, cement in bags, blocks, labour, shuttering, doors and windows counted, bathrooms priced by brand tier — with the contractor's overheads and margin shown as its own honest line instead of hidden in a rate. Every rate carries its source and date, and real project data recalibrates the numbers over time. Ranges are advisory until a free site assessment turns them into a written quotation.
Interactive estimate
Build your estimate
Change any parameter — everything recomputes instantly from researched unit rates. No sign-up, no phone number required to see the numbers.
Your project
Built-up area assumes typical BBMP setbacks on a 30×40 plot.
Quality tier
Estimated project cost · Standard
₹47 – 78 lakh
Timeline: 9–12 months · monsoon timing can stretch this
Advisory estimate for budgeting, not a quotation. A written, itemised Sevantay Realty quotation follows a free site assessment — and that document, not this page, is what you commit to. Includes GST at 18% and a 5–8% contingency.
Where the money goes
| TMT steel Fe500 (~4.0 kg/sqft) Consumption thumb rule: 3.5–4.5 kg per sqft of BUA — the model uses 4.0. | 7600 × kg | ₹4.3 – 5.2 lakh |
| Cement (~0.45 bags/sqft) Consumption: ~0.45 bags per sqft BUA including plaster (JK Cement, Happho). | 855 × bag | ₹2.9 – 3.8 lakh |
| M-sand (~1.6 cft/sqft) ~1.6 cft per sqft BUA including plaster and flooring mortar. | 3040 × cft | ₹1.4 – 2 lakh |
| Coarse aggregate (~1.2 cft/sqft) ~1.2 cft per sqft BUA. | 2280 × cft | ₹86,640 – ₹1,25,400 |
| Concrete blocks (~3.2/sqft) ~3.2 blocks per sqft BUA (brick-equivalent 25–35 ÷ 9). | 6080 × block | ₹1.9 – 2.9 lakh |
| Civil labour — mason, helper, all trades Mason ₹800–1,200/day, helper ₹450–700; central Bengaluru +15–25%. | 1900 × sqft (BUA) | ₹4.4 – 5.7 lakh |
| Shuttering, centering, curing & consumables Derived to reconcile component totals with audited turnkey bands — flagged for early calibration from real BOQs. | 1900 × sqft (BUA) | ₹1.8 – 2.7 lakh |
| Terrace waterproofing — full system | 950 × sqft (terrace) | ₹1.1 – 2.1 lakh |
| Compound wall & gate (~140 rft) Gate included as an averaged allowance; automation extra. | 140 × rft | ₹1.3 – 2.2 lakh |
| Sump & overhead tank | 1 lumpsum | ₹1 – 1.6 lakh |
- Works subtotal
- ₹37 – 59 lakh
- Design & consultant fees
- ₹1.1 – 2.9 lakh
- GST (18%)
- ₹6.9 – 11 lakh
- Contingency (5–8%)
- ₹2.3 – 5.8 lakh
- Estimated total
- ₹47 – 78 lakh
Choose your tier with open eyes
Same project, three honest specifications. The differences are listed exactly — this is where budget decisions belong.
Essential
₹42 – 69 lakh
A sound, honest build with ISI-marked basics — the spec most "starting at" ads quietly describe.
- M20 RCC, standard Fe500 steel, solid-block masonry
- Vitrified tiles ~₹60–80/sqft, flush doors, UPVC basic windows
- Tractor-class emulsion, Cera/Hindware-class sanitaryware
- Right where a 30×40 budget is the binding constraint
Standard
selected₹47 – 78 lakh
The spec most families actually build — branded materials, better waterproofing, cleaner detailing.
- M20/M25 mix as design demands, branded cement (UltraTech/ACC class)
- GVT tiles ~₹80–120/sqft, teak-finish main door, UPVC windows
- Apcolite-class paints, Jaquar-class CP fittings
- Proper terrace waterproofing system, not just a chemical coat
Premium
₹57 – 99 lakh
Designer elevation, large-format finishes, premium brands — the house photographs like a project.
- Elevation features (cladding, pergolas, cantilevers) engineered in
- Large-format/imported tiles, hardwood doors, premium UPVC/aluminium
- Royale-class paints, Kohler/Grohe-class bathrooms
- Automation-ready electrical, designer lighting
Where can I save?
Compare like-for-like quotations
3–8%Three contractors quoting the "same" house differ by lakhs in steel brand, wall thickness and fixture allowances. Normalising quotes before choosing routinely saves more than any material downgrade.
Phase the build structurally
defers 25–40%Design columns and footing for the full height but build fewer floors now. The extra structural cost is small; retrofitting strength later is impossible.
Tile and sanitaryware timing
1–3% of totalFinish materials bought during festival-season dealer schemes save 10–20% on tiles, CP fittings and paints without changing the specification.
Keep the footprint simple
2–6%Every cantilever, curved wall and level change adds shuttering and labour. A clean rectangle with a considered elevation costs less than a complicated massing with a plain one.
Assumptions, unit rates and sources behind this estimate
| Rate used | Unit | Standard band | Basis | As of |
|---|---|---|---|---|
| TMT steel Fe500/550D (JSW/Tata class) | per kg | ₹56 – ₹68 | Research · tatanexarc.com, buildmaadi.com | 2026-08 |
| Cement 50kg bag (UltraTech/ACC/Birla class) | per bag | ₹340 – ₹450 | Research · varnahomes.in, buildmaadi.com | 2026-08 |
| M-sand (structural + plaster) | per cft | ₹45 – ₹65 | Research · alphasand.in, varnahomes.in | 2026-08 |
| Coarse aggregate (20mm/12mm) | per cft | ₹38 – ₹55 | Research · infralens.in, houseyog.com | 2026-08 |
| Solid concrete blocks (6"/4" mix) | per block | ₹32 – ₹48 | Research · alphasand.in, indiamart.com | 2026-08 |
| Civil labour — all trades (labour-contract basis) | per sqft (BUA) | ₹230 – ₹300 | Research · architects4design.com, relgrow.com | 2026-08 |
| Shuttering, centering, curing, scaffolding & consumables | per sqft (BUA) | ₹95 – ₹140 | Research · houseyog.com, jkcement.com | 2026-08 |
| Terrace waterproofing — full system (screed + membrane) | per sqft (terrace) | ₹120 – ₹220 | Research · asianpaints.com, houseyog.com | 2026-08 |
| Flooring — tiles supplied + laid | per sqft (floor) | ₹140 – ₹210 | Research · mytyles.com, morbitilehub.com | 2026-08 |
| Main door — door, frame, hardware, install | per door | ₹32,000 – ₹62,000 | Research · tfsworld.in | 2026-08 |
| Internal doors — flush door, frame, hardware | per door | ₹9,000 – ₹16,000 | Research · tfsworld.in, nobroker.in | 2026-08 |
| Windows — UPVC/aluminium, glazed & installed | per sqft (window) | ₹500 – ₹750 | Research · mccoymart.com, nobroker.in | 2026-08 |
| Interior painting (walls + ceiling) | per sqft (paintable) | ₹28 – ₹40 | Research · aapkapainter.com | 2026-08 |
| Exterior painting (Asian Paints ladder) | per sqft (wall) | ₹28 – ₹42 | Research · aapkapainter.com | 2026-08 |
| Electrical — wiring, points, DBs (Polycab/Havells wire class) | per sqft (BUA) | ₹32 – ₹50 | Research · houseyog.com, civillane.com | 2026-08 |
| Bathroom — plumbing, waterproofing, tiling, sanitaryware & CP | per bathroom | ₹1 lakh – ₹1.7 lakh | Research · renubath.in, housegyan.com | 2026-08 |
| Kitchen & utility civil — counter base, dado, sink point | lumpsum | ₹40,000 – ₹80,000 | Research · houseyog.com, nobroker.in | 2026-08 |
| Compound wall (5–6 ft masonry) with MS gate | per rft | ₹950 – ₹1,600 | Research · houseyog.com, aecord.com | 2026-08 |
| Borewell — drilling, casing, pump & electricals | lumpsum | ₹90,000 – ₹2 lakh | Research · roboborewell.in, krishnaborewell.com | 2026-08 |
| RCC sump (~10,000 L) + overhead tank | lumpsum | ₹1 lakh – ₹1.6 lakh | Research · ekaplumbingbangalore.com, architects4design.com | 2026-08 |
| BBMP plan sanction, khata & scrutiny (up to G+2) | lumpsum | ₹40,000 – ₹90,000 | Research · sturdygroups.com, aecord.com | 2026-08 |
| BESCOM power + BWSSB water/sanitary connections & deposits | lumpsum | ₹35,000 – ₹90,000 | Research · citizenmatters.in, nobroker.in | 2026-08 |
Researched rates are refreshed as the market moves; calibrated rates are updated from anonymised, aggregated Sevantay Realty quotations and invoices. No individual vendor or customer pricing is ever identifiable.
Turn this estimate into a real, written quotation
A free site assessment converts these ranges into your number — itemised, with material brands named, and payable stage by stage. No advance until you approve the scope.
What moves this cost most
- Floors — each adds ~950 sqft of built-up area at full rate
- Finish tier — moves the rate ±₹200–500/sqft on its own
- Soil — rock excavation or deep footings surface only after digging starts
- Steel & cement — ~25–30% of cost; market moves flow straight through
- Design complexity — elevation features add 10–18% to structure and finishing
Commonly excluded from quotes
- Land cost, stamp duty and registration
- Interiors: modular kitchen, wardrobes, loose furniture
- Elevation extras beyond the chosen tier (stone cladding, landscape)
- Rainwater harvesting beyond the statutory minimum
- Solar water heater / solar power systems
Hidden costs to budget for
- Rock excavation if hard strata is hit — ₹1–4 lakh on bad plots
- Betterment charges in newly added BBMP wards
- Water tankers during construction if the borewell disappoints
- Labour cess and design changes mid-build — the classic budget eaters
- Deep borewells: Bengaluru increasingly needs 800–1,200 ft
Common questions
What does a 30x40 G+1 house cost in Bengaluru in 2026?
With approvals, borewell, compound wall, GST and contingency included — the way this estimator counts — a G+1 computes to ₹47–78 lakh at Standard tier on the full bill-of-quantities model. Bare construction-only quotes look lower because they exclude exactly those items.
Why is this higher than "₹1,700 per sqft" ads?
Those rates describe a stripped Essential spec and exclude approvals, borewell, sump, compound wall and GST. Ask any advertiser for their exclusion list and the gap closes fast — that is precisely why this estimator itemises everything.
How much does each extra floor add?
Roughly ₹20–30 lakh per floor at Standard tier (≈950 sqft of materials, labour and finishes plus a bathroom), but sanction costs step up beyond G+2 and a lift becomes worth considering at G+3.
Can I build G+3 on any 30x40 site?
No — FAR and road width decide. Many 30×40 plots on narrower roads are capped lower. Plan sanction determines it, and we coordinate that assessment before construction planning.
Ready for your real number?
A free site assessment turns these ranges into a written, itemised quotation with staged payments — the document you actually commit to.