Last updated: 30 October 2026 · By the Sqft Expert engineering team
Quick answer
A 30×40 rental building in Bangalore is usually a G+2: three floors of about 900–1,100 sq.ft each, 2,700–3,300 sq.ft in total, with the owner living on one floor and renting the other two. Each floor fits either one 2BHK (about 800–850 sq.ft) or two 1BHKs (about 380–420 sq.ft each), off one common staircase on a side wall.
Construction costs about ₹48.6 lakh to ₹83.5 lakh on Sqft Expert packages (₹1,799–₹2,529 per sq.ft, GST included). A 3,000 sq.ft G+2 with rental floors on the Dream Value package and the owner's floor finished to Luxury Home specification comes to roughly ₹57.3 lakh. The full breakdown is on the 30x40 house construction cost in Bangalore page.
Key takeaways
- One 2BHK per floor gives fewer, longer-staying family tenants. Two 1BHKs per floor give more rent but more turnover, kitchens and bathrooms.
- Owners usually live on the ground floor (no stairs, garden access) or the top floor (terrace, privacy, less noise).
- Upgrading only the owner's floor saves about ₹6.6 lakh compared with building every floor on Luxury Home.
- Plan three things for every unit from day one: a separate electricity meter, water storage and the parking count.
- Design the foundation and columns for the final number of floors, even if you build in stages.
The first decision shapes everything else: what goes on each floor.
One 2BHK or two 1BHKs per floor?
On a 30×40 G+2, each rental floor has about 850–900 sq.ft of usable built-up area after the common staircase. That fits one 2BHK or two compact 1BHKs.
| One 2BHK per floor | Two 1BHKs per floor | |
|---|---|---|
| Unit size | About 800–850 sq.ft | About 380–420 sq.ft each |
| Rental units on a G+2 (owner on one floor) | 2 | 4 |
| Typical tenants | Families | Working professionals, couples |
| Turnover | Lower; families tend to stay longer | Higher; more vacancies to manage |
| Construction cost | Lower: one kitchen and two baths per floor | Higher: two kitchens and two baths per floor, more doors, plumbing and wiring |
| Parking pressure | Manageable | High; a 30×40 cannot park a car for every unit |
| Total rent | Lower | Usually higher in areas near offices and metro stations |
So which is right? Near tech parks and metro lines, two 1BHKs usually earn more. In family neighbourhoods near schools, one 2BHK per floor is easier to let and to manage. Check what is actually renting quickly within a kilometre of your site before you decide.
Which floor should the owner live on?
Most owners on a 30×40 G+2 take either the ground floor or the top floor. Both work. They suit different families.
- Ground floor: no stairs, which matters for elderly parents. It has direct access to the parking and the front setback garden, and makes it easy to keep an eye on the building. The downside is less privacy, because every tenant walks past your door.
- Top floor: private use of the terrace, no footsteps overhead, better views and breeze. The downside is daily stairs unless you plan a lift, and more heat from the roof, so budget for heat-reflective terrace treatment.
One more option: a ground + first floor duplex for the owner with one rental floor on top. You get a family home and one tenant, which is a good middle path. See the 30x40 duplex house plan.
Floor-by-floor layout of a 30×40 G+2 rental building
Here is the usual arrangement, described in words, for a G+2 with the owner on the ground floor and one 2BHK on each upper floor:
| Level | What goes there |
|---|---|
| Front setback | Gate, one car, two-wheelers, sump, electricity meter board |
| Ground floor (owner) | 2BHK or 3BHK compact, with its own entrance separate from the staircase lobby |
| Staircase | Common, on one side wall, about 7.5×12 ft, with the unit doors opening off each landing |
| First floor (rental) | One 2BHK, or two 1BHKs facing front and back |
| Second floor (rental) | Same as the first floor, so kitchens and bathrooms stack |
| Terrace | Overhead tanks, solar heater, drying area; decide in the rental agreement who may use it |
With stilt parking, the owner's unit moves to the first floor and the building becomes stilt + 3 floors, if your plot's FAR and height limit allow it. Stack every kitchen and bathroom directly above the one below. It is the single biggest saving in plumbing cost and future leak repairs.
For facing-specific placement (entrance, kitchen corner, staircase side), see the east facing, north facing, west facing and south facing 30×40 plans. Each includes a G+2 rental layout.
How much does a 30×40 G+2 rental building cost?
About ₹48.6 lakh to ₹83.5 lakh for 2,700–3,300 sq.ft, civil construction only. The trick most owners use is to finish the rental floors on an economical package and upgrade only their own floor. For a 3,000 sq.ft G+2 (1,000 sq.ft per floor):
| Approach | How it is worked out | Approx. cost |
|---|---|---|
| All floors on Dream Value | 3,000 × ₹1,799 | ₹54.0 lakh |
| Rental floors on Dream Value, owner's floor at Luxury Home specification | 2,000 × ₹1,799 + 1,000 × ₹2,129 | ₹57.3 lakh |
| All floors on Luxury Home | 3,000 × ₹2,129 | ₹63.9 lakh |
That middle row saves about ₹6.6 lakh against building everything on Luxury Home, and tenants usually pay for location and size more than for premium fittings. The structure, waterproofing and plumbing quality stay the same on every floor. Only finishes change. Ask for a floor-wise quote that shows this split.
Approvals, compound wall, borewell, utility connections and a lift (if any) are extra. Compare packages on house construction packages in Bangalore.
How to estimate the rental return
Gross rental yield is the annual rent divided by what you spent to build, shown as a percentage. Leave the land out if you already own it, and include it if you are buying a site to build on.
Gross yield = (monthly rent per unit × number of units × 12) ÷ construction cost × 100
An illustration only, not a market rate: if two rental 2BHKs each let for ₹20,000 a month, the annual rent is ₹4.8 lakh. On a construction cost of ₹57.3 lakh, that is a gross yield of about 8.4%. Before you decide, look up what similar units actually rent for within a kilometre of your site.
Then subtract the running costs: property tax, maintenance, vacancy between tenants and common-area electricity. That gives the real figure.
Services to plan for three households
A rental building fails on services more often than on structure. Plan these in the drawings, not after handover:
- Electricity: a separate BESCOM meter for each unit plus one for the common areas (staircase lights, water pump). Leave space for the meter board in the front setback.
- Water storage: a common planning figure is 135 litres per person per day. Three families of four need about 1,600 litres a day, so size the sump and overhead tank for at least one to two days. See sump size requirements.
- Water metering: separate lines or sub-meters for each unit avoid arguments over water bills.
- Parking: a 30×40 front setback or stilt takes one or two cars plus two-wheelers. Decide who gets the car space before you sign agreements, and check the parking norms that apply to your number of units.
- Sound: a floor finish with an underlay, and solid-core unit doors, reduce noise complaints between floors.
- Rainwater harvesting: as required by BWSSB for your plot size.
Build now or build in stages?
Many owners build the ground floor or G+1 first and add rental floors later. That works, with one condition: the foundation and columns must be designed for the final floor count from the start.
Here's the trade-off. Building in stages spreads the cost, but each stage brings a new mobilisation, a disturbed household and a new round of waterproofing at the joint between old and new work. Building all floors at once is usually cheaper per sq.ft and finishes sooner. Either way, get the full building sanctioned, not just the first stage, and decide the stair position on day one.
5 mistakes to avoid in a 30×40 rental building
- Designing the foundation for fewer floors than you will build. It cannot be fixed cheaply later.
- Kitchens and bathrooms that don't stack. Leaks in rental buildings become neighbour disputes.
- One shared electricity meter. Splitting bills between tenants never works for long.
- Undersized water storage. A sump sized for one family runs dry with three.
- Building more units than the plot can park. Parking becomes the most common tenant complaint.
Build your 30×40 rental building with Sqft Expert
Sqft Expert is a Bangalore turnkey house construction company founded in 2019. Every package includes architectural and structural design, 310+ quality checks and a 10-year structural warranty. Ask us for a floor-wise estimate that shows the owner's floor and the rental floors separately. See rental building construction in Bangalore for other plot sizes, or get an estimate with the construction cost calculator.
