# Can a Builder Build a New Tower Without Owners' Consent? What the Law Actually Says No — once flats in a sanctioned apartment scheme are sold and occupied, the land marked for common use becomes the collective property of all owners, not spare inventory the builder can develop again. A Karnataka High Court Division Bench confirmed this directly in a September 2026 ruling: a developer cannot get a new block sanctioned by reckoning Floor Area Ratio (FAR) on common land without the **express consent of existing owners**. If you live in an older, phase-wise apartment complex — in Bengaluru or anywhere else in India — and you've just heard whispers of a 'Phase 2 tower' or a new block coming up on the open plot inside your compound, this ruling is worth understanding in detail before your next RWA meeting. ## The Ruling That Changes the Game for Phase-Wise Complexes The case is *H.M. Tambourine Apartment Owners Association v. Bangalore Development Authority*. The facts are common enough that they'll feel familiar to owners in dozens of similar complexes across Indian cities: - The apartment scheme had already been sanctioned, and 241 flats in an earlier block were already occupied. - The builder then sought sanction for a fifth block, on the same land, by treating it as available FAR. - The Karnataka High Court's Division Bench held that once purchasers acquire undivided interest in a sanctioned scheme, that land is common area and common facilities — and a builder cannot unilaterally get further construction sanctioned on it without existing owners' express consent. The reasoning is simple and, frankly, overdue: buyers don't just purchase a flat — they purchase an undivided share in the land the entire scheme sits on. Sanctioned open space, parking areas, gardens, and similar land aren't a builder's leftover asset once possession has been handed over. *(Source: RERA weekly case-law digest, ibclaw.in, covering rulings from September 7–12, 2026.)* ## What Counts as 'Common Area' in Your Apartment Complex? This is the question every RWA needs to answer first, and the answer lives in one document: **your project's originally sanctioned building plan**, filed with the local development authority (BDA, in Bengaluru's case) at the time of project approval. Common area typically includes: - Open land and setbacks not earmarked for a specific building or unit - Internal roads, parking areas, and landscaped zones - Amenity spaces such as clubhouses, gardens, and playgrounds shown in the sanctioned plan - Any land that was part of the total plot on which FAR/FSI for the *entire* scheme was calculated If a builder's 'new tower' land falls into any of these categories in your sanctioned plan, the H.M. Tambourine precedent applies directly: it's common property, and it needs owners' consent to be touched. ## The Two-Thirds Consent Rule, Explained Alongside the Karnataka HC ruling, K-RERA has separately reiterated a consent threshold for changes to common areas and facilities: alterations of this kind require the consent of at least **two-thirds of allottees**, not a simple builder announcement or a general body meeting where only a handful of owners were present. This matters for two reasons: 1. It sets a *numerical* bar — a builder can't claim 'the association was informed' as equivalent to consent from two-thirds of owners. 2. It applies to alterations generally — not just new towers, but structural changes, repurposing of common amenities, or reducing common open space for any new construction. ## What a Builder Can and Can't Do Without Owner Consent | Scenario | Needs owners' consent? | Why | |---|---|---| | Adding a new tower on land shown as common/open space in the sanctioned plan | Yes — express consent required | Land becomes common property once flats are sold and occupied (H.M. Tambourine ruling) | | Structural alteration to an existing block (e.g., adding floors) | Yes — two-thirds consent threshold applies | Falls under K-RERA's alteration consent rule | | Builder retains a separate, distinctly demarcated plot outside the sanctioned common scheme | Depends on original allotment terms | Must be verified against the sanctioned plan and builder-buyer agreements, not assumed | | Repairs or maintenance within already-approved common facilities | No — routine maintenance isn't 'alteration' | Doesn't change FAR, ownership, or common area boundaries | | Reallocating open parking/garden area to a new saleable block | Yes — express consent required | Reduces common area available to existing owners | This table is a starting framework, not a legal verdict for your specific complex — always cross-check against your project's sanctioned plan and RERA registration. ## What 'Express Consent' Actually Requires This is where many owners get caught out. 'Consent' in this context does not mean: - A notice pasted on the society board - A verbal discussion at an AGM with low attendance - Silence from owners who didn't object Express consent, as courts have read it, requires a clear, documented, affirmative agreement — typically in writing, ideally with individual owner signatures or a formally recorded resolution meeting the applicable consent threshold. If a builder's 'consent' consists of an announcement rather than documented sign-off, it likely doesn't meet the legal bar set by this ruling. ## 3 Questions Every RWA Should Ask Before a 'Phase 2' Announcement Before any conversation about a new block progresses further, an RWA — or an individual owner — should ask: 1. **Is this land marked as common area in the originally sanctioned building plan?** Get a copy of the sanctioned plan from the local development authority if your association doesn't already have one on file. 2. **Has the two-thirds owner consent threshold actually been met, and is there documentation to prove it?** A meeting minute referencing 'general approval' isn't the same as a signed, threshold-compliant consent record. 3. **Is any 'consent' being sought now, or is the builder proceeding on the assumption that occupation of earlier blocks implied consent for future ones?** These are legally distinct, and this ruling specifically rejects the second assumption. ## This Isn't Just a Bengaluru Problem While this ruling comes from the Karnataka High Court and is most directly binding within that state, the underlying principle — that common land becomes collectively owned once a scheme is sanctioned and flats are sold — reflects a broader logic found in apartment ownership laws and RERA frameworks across India. Phase-wise apartment complexes with visible 'undeveloped' plots inside the compound exist in Gurugram, Noida, Pune, and Hyderabad just as much as in Bengaluru. Any RWA facing a similar 'next phase' announcement should be asking the same three questions, regardless of city, while checking the specific state RERA and apartment ownership rules that apply locally. ## What to Do If a Builder Announces a New Tower in Your Complex - Request the originally sanctioned building plan from your local development authority or RERA project page. - Convene a formal RWA general body meeting specifically on this issue, with attendance and voting properly recorded. - Ask the builder, in writing, to produce documented proof of the consent threshold being met — not a verbal assurance. - If in doubt, consult a lawyer familiar with RERA and apartment ownership law before signing anything, including 'no objection' forms. This article is general information based on a recent court ruling and is not personalised legal advice. Verify facts specific to your project's sanctioned plan and RERA registration with a qualified professional before taking any action. ## Frequently Asked Questions See below. --- *If you're evaluating a resale flat in an older Bengaluru complex, or researching a new project before you buy, Cityyframe's verified listings and locality insights can help you check a project's RERA and sanctioned-plan status before you commit.*